Isuzu Rodeo UE. Service manual - part 240

6E1–331

RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P1336 CKP System Variation Not Learned

 

Step

Action

Value(s)

Yes

No

1

Was the ”On–Board Diagnostic (OBD) System Check”
performed?

—

Go to Step 2

Go to

Powertrain

OBD System

Check 

2

Perform the Crankshaft Position Sensor Tooth Error
Correction(TEC) Learning Procedure as follows:
When performing the Crankshaft Position Sensor
Tooth Error Correction (TEC) Learning Procedure
always set the vehicle parking brake and block the
drive wheels. Release the throttle immediately when
the engine starts to decelerate. Once the learn
procedure is completed, engine control will be returned
to the operator and the engine will respond to throttle
position.

1. Install a Tech 2.
2. Put vehicle in Park or Neutral.
3. Run the engine until it is above the specified

temperature.

4. Set the vehicle parking brake and block the drive

wheels.

5. Turn all accessories OFF.
6. Enable the Crankshaft Position Sensor Tooth Error

Correction (TEC) Learning Procedure with the Tech
2.

7. Raise the engine RPM to the specified value

RELEASING the throttle as soon as the engine
shuts out.

Does the Tech 2 indicate that Crankshaft Position
System variation has been learned?

70

°

C (158

°

F)

3920 RPM

Go to Step 5 

Go to Step 3 

3

Attempt Crankshaft Position System Variation
Learning Procedures many times as the specified
value.

Does the Tech 2 indicate that Crankshaft Position
System variation has been learned?

5

Go to Step 5 

Go to Step 4 

4

Repair Check for a problem with the a Crank Sensor to
Crankshaft relationship and repair as necessary?
Refer to the Excessive Crankshaft Variation Symptom
Table.

—

Go to Step 5 

—

5

1. Using the Tech 2, clear DTCs.
2. Start the engine and idle at normal operating

temperature.

3. Operate vehicle within the conditions for setting this

DTC as specified in the supporting text.

Does the Tech 2 indicate that this diagnostic ”Ran and
Passed?”

—

Go to Step 6 

Go to Step 2 

6

Check if any additional DTCs are set.

Are any DTCs displayed that have not been
diagnosed?

—

Go to

applicable
DTC table

System OK

6E1–332

RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) P1380 ABS ROUGH ROAD SYSTEM

FAULT

014RX002

Circuit Description

The PCM identifies an engine misfire by detecting the
variations in crankshaft speed. The crankshaft speed
variations can also occur when a vehicle is operated over
a rough surface.  The ABS (Anti–Lock Brake System) can
detect when the vehicle is on a rough surface based on
the wheel acceleration/deceleration data supplied by
each wheel speed sensor. The EBCM (Electronic Brake
Control Module) over the Class 2 serial data line sends
this information to the PCM. The OCM then uses this
information in order to determine if the crankshaft
variations are being caused by an actual engine misfire or
from being driven on a rough surface.
This Diagnostic determines if the ABS system is not
capable of detecting a rough road situation.  DTC P1380
is a type D code.

Conditions for Setting the DTC

f

20 unusable ABS data values within a 50 value sample.

Conditions for Clearing the DTC

f

A history DTC clears after 40 consecutive warm–up
cycles without a fault.

f

The Tech 2 can clear the DTC.

Diagnostic Aids

The setting of this DTC indicates that a misfire was
detected and that the PCM could not determine if the

detected misfire was true or due to operating the vehicle
on a rough surface. A misfire can be a true misfire with or
without setting this DTC.  Check the EBCM for poor
connections at the Class 2 serial data terminals. Be sure
no true misfire exists after repairing the cause of this DTC.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
1. The Powertrain OBD System Check prompts the

technician to complete some basic checks and store
the freeze frame and failure records data on the
Tech 2 is applicable. This creates an electronic copy
of the data taken when the malfunction occurred.
The information is then stored on the Tech 2 for
later reference.

2. ABS DTCs are found by selecting Chassis on the

Tech 2.

3. Be careful to clear only DTCs and not the captured

information stored on the Tech 2. The Tech 2 will
issue a warning if this is about to happen.

4. A DTC P1380 being reset indicated that the PCM is

not receiving the correct information from the EBCM
due to an ABS DTC.

5. When DTC P1380 is set, and ABS DTC should also

be set.

6. Refer to Section 5E of the manual for ABS

DTCs and repairs.

6E1–333

RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

8. Repair any condition that remains and is causing a

misfire by following the table for any DTC that has
set.

9. Replacement PCMs must be reprogrammed. Refer

to the latest Isuzu Technical Communication System
information for programming procedures.

DTC P1380 ABS Rough Road System Fault

 

Step

Action

Value(s)

Yes

No

1

Was the ”On–Board Diagnostic (OBD) System Check”
performed?

—

Go to Step 2 

Go to

Powertrain

OBD System

Check 

2

1. Turn the ignition switch ON, with the engine OFF.
2. Install the Tech 2.
3. Check for any ABS DTCs.

Were any ABS DTCs set?

—

Go to Step 6 

Go to Step 3 

3

1. Turn the ignition switch ON, with the engine OFF.
2. Review the Freeze Frame data and note the

parameters.

Did a misfire DTC set?

—

Go to Step 4 

Go to Step 10

4

Was a DTC P1380 also set?

—

Go to Step 5 

Go to Step 8 

5

Did a ABS DTC also set?

—

Go to Step 6 

Go to Step 9 

6

Repair the condition causing the ABS DTC.

Is the action complete?

—

Go to Step 7 

—

7

Check if any additional DTCs are set.

Are any DTCs displayed that has not been diagnosed?

—

Go to

applicable
DTC table

System OK

8

Repair the condition causing the misfire.

Is the action complete?

—

Go to Step 10

—

9

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.Refer to On–Vehicle Service in
Powertrain Control Module and Sensors for
procedures. 

And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.

Is the action complete?

—

Go to Step 10

—

10

1. Using the Tech 2, clear the DTCs.
2. Start the engine and idle at normal operating

temperature.

3. Operate the vehicle within the conditions for setting

this DTC as specified in the supporting text.

Does the Tech 2 indicate that this diagnostic has ”Ran
and Passed?”

—

Verify repair

—

6E1–334

RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) P1381 ABS ROUGH ROAD CLASS 2 

SERIAL DATA FAULT

014RX002

Circuit Description

The PCM identifies an engine misfire by detecting the
variations in crankshaft speed. The crankshaft speed
variations can also occur when a vehicle is operated over
a rough surface. The ABS (Anti–Lock Brake System) can
detect when the vehicle is on a rough surface based on
the wheel acceleration/deceleration data supplied by
each wheel speed sensor. The EBCM (Electronic Brake
Control Module) over the Class 2 serial data line sends
this information to the PCM. The PCM then uses this
information in order to determine if the crankshaft
variations are being caused by an actual engine misfire or
from being driven on a rough surface. DTC P1381 is a
type D code.

Conditions for Setting the DTC

f

A DTC P0300–P0304 has been set.

f

The vehicle speed is greater than 1 mph (2 km/h).

f

The Manifold Absolute Pressure (MAP) is below 99.7
kPa.

f

The engine speed is below 3406 RPM.

f

The PCM has not received any ABS information for 2.5
seconds.

Action Taken When the DTC Sets

f

The PCM records the operating conditions at the time
the diagnostic fails. The Failure Records buffers stores
this information.

f

A history DTC is stored.

f

The PCM will not illuminate the Malfunction Indicator
Lamp (MIL).

Conditions for Clearing the DTC

f

A history DTC clears after 40 consecutive warm up
cycles without a fault.

f

The Tech 2 can clear the DTC.

Diagnostic Aids

The setting of this DTC indicates that a misfire was
detected and that the PCM could not determine if the
detected misfire was true or due to operating the vehicle
on a rough surface. A misfire can be a true misfire with or
without setting this DTC. Check the EBCM for poor
connections at the Class 2 serial data terminals. Be sure
no true misfire exists after repairing the cause of this DTC.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
1. The Powertrain OBD System Check indicates that a

misfire was detected and that the PCM could not
determine if the detected misfire was true or due to
operating the vehicle on a rough surface. A misfire
can be a true misfire with or without setting this
DTC. Check the EBCM for poop connections at the
Class 2 serial data terminals.  Be sure no true
misfire exists after repairing the cause of this DTC.