New Holland Tractor Workmaster 50 / Workmaster 60 / Workmaster 70 / Tier 4B (final). SERVICE MANUAL - page 20
Electrical systems - FAULT CODES
DTC 17E - 04-Injection control : Number of injections is limited
by system
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the requested number of fuel injections and the current capability
of the fuel injection system to fulfill that request. If the ECU A-9000 determines that the requested number of fuel
injections can not be reached, this fault will occur.
Cause:
The ECU A-9000 has determined that the requested number of fuel injections is greater than the current capability of
the fuel injection system.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
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Electrical systems - FAULT CODES
DTC 17E-12-Number of injections is limited by quantity balance
of high pressure pump
Control Module : ECU
Context:
The ECU A-9000 monitors the requested number of fuel injections and the current capability of the fuel injection sys-
tem to fulfill that request. If the ECU A-9000 determines that the number of requested fuel injections is greater than the
current capability of the fuel injection system, this fault will occur. For more information regarding the troubleshooting
of the fuel system, see Fuel injection system - Troubleshooting (10.218).
Cause:
The ECU A-9000 has determined that the number of requested fuel injections is greater than the current capability of
the fuel injection system to fulfill that request.
Possible failure modes:
1. Faulty fuel back-flow, excessive.
2. Faulty high pressure pump, worn or ageing.
3. Faulty fuel metering unit, unable to open.
4. Faulty fuel temperature, too high.
5. Faulty fuel injectors, worn or internal leakage.
6. Faulty fuel filters, clogged.
7. Faulty charge gear pump, low efficiency.
8. Faulty Pressure Relief Valve (PRV), leakage.
9. Faulty rail pressure sensor B-9004, drifted signal or leakage.
10. Faulty fuel injection system, leaking or blocked lines.
11. Faulty ECU A-9000, software.
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Electrical systems - FAULT CODES
DTC 17F-12-Missing adjustment value programming for injector in
cylinder 1
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 uses an IMA code to correct fuel trim for each fuel injector equipped with the
engine at every key ON. If the ECU A-9000 determines that this trim correction for fuel injector number 1 Y-9001 can
not be performed, this fault will occur. For more information about how to configure injector IMA codes, see Fuel
injectors - Configure - IMA codes (10.218).
Cause:
The ECU A-9000 has determined that the fuel injector number 1 Y-9001 fuel trim correction can not be performed.
Solution:
1. Use the Electronic Service Tool (EST) ensure that the correct IMA code is programmed to fuel injector number 1
Y-9001.
A. If the correct code is not programmed. Use the EST to program the correct code.
B. If the correct code is programmed, continue to Step 2.
NOTE: The IMA code may be under the paint on the fuel injector.
2. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
87
Electrical systems - FAULT CODES
DTC 18F-02-Lambda sensor heater power stage open circuit
Control Module : ECU
NOTE: If the Lambda sensor B-9123 is replaced, it is necessary to perform the Replacement of the Lambda Sensor
- Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service. See Lambda
sensor - Configure - Reset ECU data (Lambda sensor) (55.989), if necessary.
Context:
The Lambda sensor B-9123 has a heating element encased in ceramic that heats the sensor tip. Whenever the heater
is operating, the heater low side driver power stage contained in the Engine Control Unit (ECU) A-9000 is monitored
for an open circuit condition. If an open circuit condition exists in the heater control circuit, this fault will occur. For in-
formation regarding the functional operation of the Lambda sensor B-9123 see Lambda sensor - Overview (55.989).
For more information regarding the technical specifications of the lambda sensor B-9123, see Lambda sensor - Tech-
nical Data (55.989).
Cause:
The Lambda sensor B-9123 low side driver heater control circuit is open.
Possible failure modes:
1. Faulty Lambda sensor B-9123 heater control circuit wiring, open circuit.
2. Faulty Lambda sensor B-9123 battery voltage supply wiring, open circuit.
3. Faulty Lambda sensor B-9123, failed internally.
4. Faulty ECU A-9000, software.
Solution:
1.
Verify that the fault present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 4.
2.
Check the Lambda sensor B-9123 heater circuit wiring for an open circuit condition.
Disconnect the vehicle harness (VE) from the Lambda sensor B-9123 at connector X-9123.
With the key switch in the ON position, use a multimeter to perform the following voltage check on the vehicle
harness (VE) side :
From
To
Value
X-9123 pin 4
chassis ground
There should be approximately
12.0 V.
A. If there is no voltage, there is an failure in the battery voltage supply wiring to the lambda sensor B-9123. Use
the appropriate vehicle service manual, if necessary, to locate and repair the failed conductor.
B. If there is voltage, leave connector X-9123 disconnected and continue with Step 3.
3.
Check the Lambda sensor B-9123 low side driver wiring for an open circuit.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
With the key in the OFF position, use a multimeter to perform the following continuity check for an open circuit on
the vehicle harness (VE) side :
From
To
Value
X-9123 pin 3
X-9102 pin K07
There should be continuity.
88
Electrical systems - FAULT CODES
A. If there is no continuity, there is an open circuit in the Lambda sensor B-9123 low side driver wiring between
connector X-9123 pin 3 and connector X-9102 pin K07. Use the appropriate service manual, if necessary, to
locate and repair the broken conductor.
B. If there is continuity, leave connector X-9123 disconnected and continue to Step 4.
4.
Replace the Lambda sensor B-9123.
Use the EST, see Lambda sensor - Configure - Reset ECU data (Lambda sensor) (55.989) if necessary, to
perform the Replacement of the Lambda Sensor - Reset ECU Data.
Use EST to check to see that this fault has been resolved.
A. If the fault has been resolved, return the machine to service.
B. If this fault has not been resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires.
Verify that the connectors are fully installed.
Flex the harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
89
Electrical systems - FAULT CODES
DTC 18F-03-Lambda sensor heater power stage short circuit to
battery
Control Module : ECU
NOTE: If the Lambda sensor B-9123 is replaced, it is necessary to perform the Replacement of the Lambda Sensor
- Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service. See Lambda
sensor - Configure - Reset ECU data (Lambda sensor) (55.989), if necessary.
Context:
The Lambda sensor B-9123 has a heating element encased in ceramic that heats the sensor tip. Whenever the
heater is operating, the heater low side driver power stage contained in the Engine Control Unit (ECU) A-9000 is
monitored for a short circuit to battery condition. If a short circuit to a power source condition exists in the heater
control circuit, this fault will occur. For information regarding the functional operation of the Lambda sensor B-9123
see Lambda sensor - Overview (55.989). For more information regarding the technical specifications of the lambda
sensor B-9123, see Lambda sensor - Technical Data (55.989).
Cause:
The Lambda sensor B-9123 low side driver heater control circuit is shorted to a voltage source.
Possible failure modes:
1. Faulty Lambda sensor B-9123 heater control circuit wiring, short to a voltage source.
2. Faulty Lambda sensor B-9123, internal failure.
3. Faulty ECU A-9000, software.
Solution:
1.
Verify that the fault present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check the Lambda sensor B-9123 heater control circuit wiring for a short to voltage source condition.
Disconnect the vehicle harness (VE) from the Lambda sensor B-9123 at connector X-9123.
With the key switch in the ON position, use a multimeter to perform the following voltage check on the vehicle
harness (VE) side :
From
To
Value
X-9123 pin 3
Chassis ground
There should be no voltage.
A. If there is voltage, leave connector X-9123 disconnected and continue to Step 3.
B. If there is no voltage, leave connector X-9123 disconnected and continue to Step 4.
3.
Locate the Lambda sensor B-9123 heater control circuit wiring short to voltage source condition.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
With the key in the OFF position, use a multimeter to perform the following continuity check on the vehicle harness
(VE) side :
From
To
Value
X-9102 pin K07
to all other pins in connector X-9102
There should be no continuity.
90
Electrical systems - FAULT CODES
A. If there is continuity, there is a short to a voltage source condition in the vehicle harness (VE). Use the appro-
priate service manual, if necessary, to locate and repair the shorted conductors.
B. If there is no continuity, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
4. Replace the Lambda sensor B-9123.
Use the EST, see Lambda sensor - Configure - Reset ECU data (Lambda sensor) (55.989) if necessary, to
perform the Replacement of the Lambda Sensor - Reset ECU Data.
Use EST to check to see that this fault has been resolved.
A. If the fault has been resolved, return the machine to service.
B. If this fault has not been resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
5. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
91
Electrical systems - FAULT CODES
DTC 18F-04-Lambda sensor heater power stage short circuit to
ground
Control Module : ECU
NOTE: If the Lambda sensor B-9123 is replaced, it is necessary to perform the Replacement of the Lambda Sensor
- Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service. See Lambda
sensor - Configure - Reset ECU data (Lambda sensor) (55.989), if necessary.
Context:
The Lambda sensor B-9123 has a heating element encased in ceramic that heats the sensor tip. Whenever the
heater is operating, the heater low side driver power stage contained in the Engine Control Unit (ECU) A-9000 is
monitored for a short circuit to ground condition. If a short to ground condition exists in the heater control circuit, this
fault will occur. For information regarding the functional operation of the Lambda sensor B-9123 see Lambda sensor
- Overview (55.989). For more information regarding the technical specifications of the lambda sensor B-9123, see
Lambda sensor - Technical Data (55.989).
Cause:
The Lambda sensor B-9123 low side driver heater control circuit is shorted to ground.
Possible failure modes:
1. Faulty Lambda sensor B-9123 heater control circuit wiring, shorted to ground.
2. Faulty Lambda sensor B-9123, failed internally.
3. Faulty ECU A-9000, software.
Solution:
1.
Verify that the fault present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check the Lambda sensor B-9123 heater control circuit wiring for a short to ground condition.
Disconnect the vehicle harness (VE) from the Lambda sensor B-9123 at connector X-9123.
Use a multimeter to check for continuity on the vehicle harness (VE) side :
From
To
Result
X-9123 pin 3
chassis ground
There should be no continuity.
A. If there is continuity, continue with Step 3.
B. If there is no continuity, continue with Step 4.
3.
Locate the Lambda sensor B-9123 heater control circuit wiring short to ground condition.
Carefully disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
Use a multimeter to check for continuity on the vehicle harness (VE) side :
From
To
Result
X-9102 pin K07
chassis ground
There should be no continuity.
A. If there is continuity, there is a short to ground condition in the vehicle harness (VE) between connector X-9123
pin 3 and X-9102 pin K07.Use the appropriate vehicle service manual, if necessary, to locate and repair the
grounded conductor.
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Electrical systems - FAULT CODES
B. If there is no continuity, the ECU A-9000 connector X-9102 is damaged or the ECU A-9000 has failed. Locate
and repair the damage or replace the ECU A-9000.
4. Replace the Lambda sensor B-9123.
Use the EST, see Lambda sensor - Configure - Reset ECU data (Lambda sensor) (55.989) if necessary, to
perform the Replacement of the Lambda Sensor - Reset ECU Data.
Use EST to check to see that this fault has been resolved.
A. If the fault has been resolved, return the machine to service.
B. If this fault has not been resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
5. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires.
Verify that the connectors are fully installed.
Flex the harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
93
Electrical systems - FAULT CODES
DTC 18F-04-Lambda sensor heater power stage short circuit to
ground
Control Module : ECU
NOTE: If the Lambda sensor B-9123 is replaced, it is necessary to perform the Replacement of the Lambda Sensor
- Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service. See Lambda
sensor - Configure - Reset ECU data (Lambda sensor) (55.989), if necessary.
Context:
The Lambda sensor B-9123 has a heating element encased in ceramic that heats the sensor tip. Whenever the
heater is operating, the heater low side driver power stage contained in the Engine Control Unit (ECU) A-9000 is
monitored for a short circuit to ground condition. If a short to ground condition exists in the heater control circuit, this
fault will occur. For information regarding the functional operation of the Lambda sensor B-9123 see Lambda sensor
- Overview (55.989). For more information regarding the technical specifications of the lambda sensor B-9123, see
Lambda sensor - Technical Data (55.989).
Cause:
The Lambda sensor B-9123 low side driver heater control circuit is shorted to ground.
Possible failure modes:
1. Faulty Lambda sensor B-9123 heater control circuit wiring, short to ground condition.
2. Faulty Lambda sensor B-9123, internal failure.
3. Faulty ECU A-9000, software.
Solution:
1.
Verify that the fault present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 4.
2.
Check the Lambda sensor B-9123 heater control circuit wiring for a short to ground condition.
Disconnect the vehicle harness (VE) from the Lambda sensor B-9123 at connector X-9123.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
Use a multimeter to perform the following continuity check on the vehicle harness (VE) side :
From
To
Value
X-9123 pin 3
chassis ground
There should be no continuity.
X-9102 pin K07
All pins in connector X-9102
There should be no continuity.
A. If there is continuity, there is a short circuit in the lambda sensor B-9123 vehicle harness (VE) wiring. Use the
appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no continuity, leave connector X-9123 disconnected and continue to Step 3.
3.
Replace the Lambda sensor B-9123.
Use the EST, see Lambda sensor - Configure - Reset ECU data (Lambda sensor) (55.989) if necessary, to
perform the Replacement of the Lambda Sensor - Reset ECU Data.
Use EST to check to see that this fault has been resolved.
A. If the fault has been resolved, return the machine to service.
94
Electrical systems - FAULT CODES
B. If this fault has not been resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
4. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
95
Electrical systems - FAULT CODES
DTC 199-02-Turbocharger boost pressure is higher than expected
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors boost pressure using the intake manifold pressure sensor B-9001.
If the ECU A-9000 determines that boost pressure is higher than expected, this fault will occur. For more information
regarding the troubleshooting of an over-boost condition, see Turbocharger - Troubleshooting (10.250).
Cause:
The ECU A-9000 has determined that boost pressure is higher than expected.
Possible failure modes:
1. Faulty wastegate, sticking or broken linkage.
2. Faulty intake manifold pressure sensor B-9001, signal drifted.
3. Faulty ECU A-9000, software.
96
Electrical systems - FAULT CODES
DTC 199-02-Turbocharger boost pressure is higher than expected
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors boost pressure using the intake manifold pressure sensor B-9001.
If the ECU A-9000 determines that boost pressure is higher than expected, this fault will occur. For more information
regarding the troubleshooting of an over-boost condition, see Turbocharger - Troubleshooting (10.250).
Cause:
The ECU A-9000 has determined that boost pressure is higher than expected.
Possible failure modes:
1. Faulty wastegate pressure modulator valve Y-9008, if applicable.
2. Faulty wastegate, sticking or broken linkage.
3. Faulty intake manifold pressure sensor B-9001, signal drifted.
4. Faulty ECU A-9000, software.
97
Electrical systems - FAULT CODES
DTC 1B1-03-CAN A Bus off failure
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two separate Controller
Area Networks (CAN). Proper configuration and monitoring of the two twisted pair configured networks is also a func-
tion of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. If the ECU A-9000 senses that CAN Node
A Bus is not functioning properly, this fault will occur.
Cause:
ECU A-9000 has sensed a Bus Off state to be present at the CAN Node A.
Possible failure modes:
1. Faulty supply voltage or ground, missing.
2. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
3. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve those vehicle CAN faults first, then check to see that this fault is
also resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
98
Electrical systems - FAULT CODES
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the OFF position, use a multimeter to measure the resistance of the CAN connection on the
vehicle (VE) harness side:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
X-9102 pin K24
chassis ground
There should be no continuity
X-9102 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, see the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
99
Electrical systems - FAULT CODES
DTC 1B1-04-CAN A Bus off passive failure
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two separate Controller
Area Networks (CAN). Proper configuration and monitoring of the two twisted pair configured networks is also a func-
tion of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. If the ECU A-9000 senses that CAN Node
A Bus is not functioning properly, this fault will occur.
Cause:
ECU A-9000 has sensed a “Bus Off” state to be present at the CAN Node A.
Possible failure modes:
1. Faulty supply voltage or ground, missing.
2. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
3. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve those vehicle CAN faults first, then check to see that this fault is
also resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
100
Electrical systems - FAULT CODES
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the “OFF” position, use a multimeter to measure the resistance of the CAN connection on
the vehicle (VE) harness side:
From
To
Value
X-9122 pin K24
X-9122 pin K25
There should be 120 Ω.
X-9122 pin K24
chassis ground
There should be no continuity
X-9122 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9122 pin K24
X-9122 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, refer to the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
101
Electrical systems - FAULT CODES
DTC 1B5-02-CAN communication error between vehicle controller
to ECU
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two or more separate
Controller Area Networks (CAN). Proper configuration and monitoring of these twisted pair configured networks is also
a function of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. The ECU A-9000 receives and responds
to proprietary information like low and high idle or intermediate speed set points and parameters or feedback. If the
ECU A-9000 does not receive the message every 0.050 s, this fault will occur.
Cause:
ECU A-9000 has sensed a timeout of required vehicle controller data provided on CAN Node A.
Possible failure modes:
1. Faulty vehicle system, related CAN fault.
2. Faulty supply voltage or ground, missing.
3. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
4. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve the vehicle CAN faults, then check to see that this fault is also
resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
102
Electrical systems - FAULT CODES
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the OFF position, use a multimeter to measure the resistance of the CAN connection on the
vehicle (VE) harness side:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
X-9102 pin K24
chassis ground
There should be no continuity
X-9102 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, see the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
103
Electrical systems - FAULT CODES
DTC 1B7-02-CAN transmit error - EEC1 message (Electronic Engine
Control 1 message - Torque, accelerator pedal, engine speed, and
other signals)
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two separate Controller
Area Networks (CAN). Proper configuration and monitoring of the two twisted pair configured networks is also a func-
tion of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. If the ECU A-9000 senses that CAN Node
A Bus is not functioning properly, this fault will occur.
Cause:
ECU A-9000 has sensed a timeout of required vehicle controller data provided on CAN Node A.
Possible failure modes:
1. Faulty supply voltage or ground, missing.
2. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
3. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve those vehicle CAN faults first, then check to see that this fault is
also resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
104
Electrical systems - FAULT CODES
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the OFF position, use a multimeter to measure the resistance of the CAN connection on the
vehicle (VE) harness side:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
X-9102 pin K24
chassis ground
There should be no continuity
X-9102 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, see the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
105
Electrical systems - FAULT CODES
DTC 1C6-03-CAN communication failure between vehicle controller
and ECU controller - TSC1_PE message
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two separate Controller
Area Networks (CAN). Proper configuration and monitoring of the two twisted pair configured networks is also a func-
tion of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. If the ECU A-9000 senses that CAN Node
A Bus is not functioning properly, this fault will occur.
Cause:
ECU A-9000 has sensed a timeout of vehicle data provided on CAN Node A.
Possible failure modes:
1. Faulty supply voltage or ground, missing.
2. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
3. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve those vehicle CAN faults first, then check to see that this fault is
also resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
106
Electrical systems - FAULT CODES
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the OFF position, use a multimeter to measure the resistance of the CAN connection on the
vehicle (VE) harness side:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
X-9102 pin K24
chassis ground
There should be no continuity
X-9102 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, see the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
107
Electrical systems - FAULT CODES
DTC 1C8-03-CAN communication failure between vehicle controller
and ECU controller - TSC1_VE message
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 is capable of connecting to and communicating on two separate Controller
Area Networks (CAN). Proper configuration and monitoring of the two twisted pair configured networks is also a func-
tion of the ECU A-9000. CAN Node A Bus is the main vehicle interface bus. The ECU A-9000 provides a CAN
termination resistor for the CAN Node A Bus, internal to the ECU A-9000. If the ECU A-9000 senses that CAN Node
A Bus is not functioning properly, this fault will occur.
Cause:
ECU A-9000 has sensed a timeout of required vehicle controller data provided on CAN Node A.
Possible failure modes:
1. Faulty supply voltage or ground, missing.
2. Faulty CAN circuit wiring, open circuit, short to ground, or short circuit.
3. Faulty ECU A-9000, termination resistor or software.
Solution:
1.
Verify fault is present and in active state.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check for other vehicle CAN faults.
Use the EST to determine if vehicle CAN faults exist.
A. If other vehicle CAN faults do exist, resolve those vehicle CAN faults first, then check to see that this fault is
also resolved.
B. If other vehicle CAN faults do not exist, continue with Step 3.
3.
Check the ECU A-9000 supply voltage.
Disconnect the vehicle (VE) harness from the ECU A-9000 at connector X-9102.
To energize the Main relay K-9102, place a jumper wire between the vehicle harness (VE) side of connector X-9102
pin K28 and chassis ground.
Use a multimeter to check for voltage on the vehicle (VE) harness side:
From
To
Value
X-9102 pin K01
X-9102 pin K02
There should be approximately
12.0 V.
X-9102 pin K03
X-9102 pin K04
There should be approximately
12.0 V.
X-9102 pin K05
X-9102 pin K06
There should be approximately
12.0 V.
A. If the voltage is present on all of the checks, leave connector X-9102 disconnected and continue with Step 4.
108
Electrical systems - FAULT CODES
B. If the voltage is not present for one or more of the checks, see the appropriate vehicle service manual and
electrical schematics, if necessary, to locate and restore supply power to the ECU A-9000.
4.
Determine the condition of the ECU A-9000 CAN circuit.
With the key switch in the OFF position, use a multimeter to measure the resistance of the CAN connection on the
vehicle (VE) harness side:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
X-9102 pin K24
chassis ground
There should be no continuity
X-9102 pin K25
chassis ground
There should be no continuity
Use a multimeter to measure the resistance of the CAN termination resistor, internal to the ECU A-9000:
From
To
Value
X-9102 pin K24
X-9102 pin K25
There should be 120 Ω.
A. If the measured resistances are correct and neither conductor is grounded, check the ECU A-9000 for the
appropriate software and re-flash, if necessary.
B. If the measured resistances are not correct or one or both of the conductors is grounded, see the appropriate
vehicle service manual and electrical schematics, if necessary, to locate and restore the termination resistance
to the CAN circuit.
5.
Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
109
Electrical systems - FAULT CODES
DTC 1D1-03-ECU internal failure
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 performs a diagnostic check of the sensor supplies by monitoring the sensor
supplies communication. If the ECU A-9000 detects a communication error during this diagnostic check, this fault will
occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
110
Electrical systems - FAULT CODES
DTC 1D2-02-ECU internal failure - EEPROM write error
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 has detected an error during the last EEPROM write operation. The hardware
encapsulation of the ECU A-9000 checks each data block of the EEPROM and sets a status flag depending on if an
error is found or not found. These flags are processed every 20 milliseconds by the Diagnostic System Management
(DSM) and if the value is out of range, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
111
Electrical systems - FAULT CODES
DTC 1D2-03-ECU internal failure - EEPROM erase error
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 has a functionality for reading and erasing values to a memory media (Flash
or EEPROM). If the ECU A-9000 determines that this process can not be performed or successfully completed, this
fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
112
Electrical systems - FAULT CODES
DTC 1D2-04-ECU internal failure - EEPROM read error
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 has detected an error during the last EEPROM write operation. The hardware
encapsulation of the ECU A-9000 checks each data block of the EEPROM and sets a status flag depending on if an
error is found or not found. These flags are processed every 20 milliseconds by the Diagnostic System Management
(DSM) and if the value is out of range, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
113
Electrical systems - FAULT CODES
DTC 1D2-12-ECU internal failure - EEPROM write/read error
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 has detected an error during the last EEPROM write operation. The hardware
encapsulation of the ECU A-9000 checks each data block of the EEPROM and sets a status flag depending on if an
error is found or not found. These flags are processed every 20 milliseconds by the Diagnostic System Management
(DSM) and if the value is out of range, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
114
Electrical systems - FAULT CODES
DTC 1D3-12-ECU internal failure - Software resets in DSM 0
Control Module : ECU
Context:
If this fault is active, the Engine Control Unit (ECU) A-9000 has detected an error that has led to a software reset.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
115
Electrical systems - FAULT CODES
DTC 1D4-12-ECU internal failure - Query/response communication
errors
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the communication between the ECU A-9000 processor and the
power stage controller over the SPI bus. If there is an error in the communication, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
116
Electrical systems - FAULT CODES
DTC 1D8-12-ECU internal failure - SPI communication error
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the communication between the ECU A-9000 processor and the
power stage controller over the SPI bus. If there is an error in the communication, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
117
Electrical systems - FAULT CODES
DTC 1D9-02-ECU internal failure - ADC test
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the Analog Digital Converter (ADC) plausibility by performing a fixed
input voltage test. If the voltage during the test is out of range, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
118
Electrical systems - FAULT CODES
DTC 1D9-03-ECU internal failure - Voltage ratio in ADC monitoring
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the Analog Digital Converter (ADC) for plausibility by providing a test
voltage to be converted. If the converted voltage is out of range, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
119
Electrical systems - FAULT CODES
DTC 1D9-12-ECU internal failure - NTP error in ADC monitoring
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the Analog Digital Converter (ADC) plausibility by running a No-load
Test Pulse operation (NTP). If the ECU A-9000 detects an error during this operation, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
120
Electrical systems - FAULT CODES
DTC 1DA-12-ECU internal failure - Fuel calibration
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 checks the map for the conversion from fuel quantity to torque for consistency.
If there is an error during this conversion check, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
121
Electrical systems - FAULT CODES
DTC 1E1-03-Starter relay high side driver circuit shorted to battery
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 controls the starter control relay K-9104 using a low side and high side driver.
If the ECU A-9000 detects a short circuit to battery in the high side driver circuit, this fault will occur.
Cause:
The ECU A-9000 has detected a short circuit to battery in the starter control relay K-9104 high side driver circuit.
Possible failure modes:
1. Faulty starter control relay K-9104 wiring, short to a voltage source.
2. Faulty starter control relay K-9104, internal failure.
3. Faulty ECU A-9000, software.
Solution:
1.
Verify fault is present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check the starter control relay K-9104 coil for an internal failure.
Remove the starter control relay K-9104.
Use a multimeter to measure the relay coil resistance on the starter control relay K-9104 pins :
From
To
Value
X-9120 pin 85
X-9120 pin 86
There should be approximately 70 -
130 Ω.
A. If there is approximately 70 - 130 Ω, leave the starter control relay K-9104 disconnected and continue to Step
3.
B. If there is not approximately 70 - 130 Ω, the relay has failed. Replace the starter control relay K-9104.
3.
Check the starter control relay K-9104 high side driver vehicle harness (VE) wiring for a short to a voltage source.
With the key in the OFF position, use a multimeter to perform the following voltage check for short to a voltage
source on the vehicle harness (VE) side :
From
To
Value
X-9120 pin 85
Chassis ground
There should be no voltage.
With the key in the ON position, use a multimeter to perform the following voltage check for short to a voltage
source on the vehicle harness (VE) side :
From
To
Value
X-9120 pin 85
Chassis ground
There should be no voltage.
A. If there is voltage, there is a short to a voltage source in the starter control relay K-9104 wiring in the vehicle
harness (VE). Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no voltage, continue to Step 4.
4.
Check the starter control relay K-9104 high side driver vehicle harness (VE) wiring for a short circuit.
122
Electrical systems - FAULT CODES
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
With the key in the OFF position, use a multimeter to perform the following continuity check for short circuit on the
vehicle harness (VE) side :
From
To
Value
X-9102 pin K53
All pins in connector X-9102
There should be no continuity.
A. If there is continuity, there is a short circuit in the starter control relay K-9104 wiring in the vehicle harness (VE).
Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no continuity, check the ECU A-9000 for the appropriate service manual and re-flash, if necessary.
5. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 01 - Power distribution and glow plugs (engine schematics)
(55.100.DP-C.20.E.01)
Wiring harnesses - Electrical schematic sheet 02 - Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
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Electrical systems - FAULT CODES
DTC 1E1-04-Starter relay high side driver circuit shorted to ground
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 controls the starter control relay K-9104 using a low side and high side driver.
If the ECU A-9000 detects a short circuit to ground in the high side driver circuit, this fault will occur.
Cause:
The ECU A-9000 has detected a short circuit to ground in the starter control relay K-9104 high side driver circuit.
Possible failure modes:
1. Faulty starter control relay K-9104 wiring, short to ground.
2. Faulty starter control relay K-9104, internal failure.
3. Faulty ECU A-9000, software.
Solution:
1.
Verify fault is present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 5.
2.
Check the starter control relay K-9104 coil for an internal failure.
Remove the starter control relay K-9104.
Use a multimeter to measure the relay coil resistance on the starter control relay K-9104 pins :
From
To
Value
X-9120 pin 85
X-9120 pin 86
There should be approximately 70 -
130 Ω.
A. If there is approximately 70 - 130 Ω, leave the starter control relay K-9104 disconnected and continue to Step
3.
B. If there is not approximately 70 - 130 Ω, the relay has failed. Replace the starter control relay K-9104.
3.
Check the starter control relay K-9104 high side driver vehicle harness (VE) wiring for a short to ground.
With the key in the OFF position, use a multimeter to perform the following continuity check for a short to ground
on the vehicle harness (VE) side :
From
To
Value
X-9120 pin 85
Chassis ground
There should be no continuity.
A. If there is continuity, there is a short to ground in the starter control relay K-9104 wiring in the vehicle harness
(VE). Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no continuity, continue to Step 4.
4.
Check the starter control relay K-9104 high side driver vehicle harness (VE) wiring for a short circuit.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
With the key in the OFF position, use a multimeter to perform the following continuity check for a short to ground
on the vehicle harness (VE) side :
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