Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 81

5A-23 Automatic Transmission/Transaxle:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC and pending DTC.

DTC Troubleshooting

NOTE
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure: ” and confirm
that the trouble has been corrected.

DTC Detecting Condition

Trouble Area

Transmission error that is inconsistent between transmission data
and transmission monitor (CAN bus monitor) data is detected more
than 7 times continuously.
(1 driving cycle detection logic)

• ECM
• TCM
• Combination meter
• BCM
• ABS/ESP

® control module

• Steering angle sensor (if equipped)
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• CAN communication line circuit

Step

Action

Yes

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check in related
manual”.

Control module connector check
1) Check connection of connectors of all control modules

communicating by means of CAN.

2) Recheck DTC in TCM referring to “DTC Check in related

manual”.

Is there DTC P1774?

Go to Step 3.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules

communicating by means of CAN.

3) Check CAN communication circuit between control

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Go to Step 4.

Repair circuit.

Automatic Transmission/Transaxle: 5A-24

DTC check
1) Turn ignition switch to OFF position.
2) Connect connectors of disconnected control modules

communicating by means of CAN.

3) Disconnect connector of any one of control module other

than TCM.

4) Recheck DTC for TCM.

Is DTC P1774 detected?

Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 3)
one by one and check
that DTC P1774 is
detected by TCM each
time connector is
disconnected. When
DTC P1774 is not
detected by TCM while
checking in this way, go
to description under
“NO” below. If DTC
P1774 is detected by
TCM even when
connectors of all control
modules that use CAN
communication with
TCM are disconnected,
substitute a known-
good TCM and recheck.

Check power and
ground circuit of control
module disconnected in
Step3). If circuit is OK,
substitute a known-
good control module
disconnected in Step 3)
and recheck.

Step

Action

Yes

5A-25 Automatic Transmission/Transaxle:

DTC P1777: TCM Lost Communication with ECM (Reception Error)

S5JB0E5104042

Wiring Diagram
Refer to “DTC P1774: CAN Communication Bus Off”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC and pending DTC.

DTC Troubleshooting

NOTE
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure: ” and confirm
that the trouble has been corrected.

DTC Detecting Condition

Trouble Area

Reception error of communication data for ECM is detected for
longer than specified time continuously.
(1 driving cycle detection logic)

• ECM
• ABS/ESP

® control module

• TCM
• CAN communication line circuit

Step

Action

Yes

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check in related
manual”.

Control module connector check
1) Check connection of connectors of all control modules

communicating by means of CAN.

2) Recheck DTC in TCM referring to “DTC Check in related

manual”.

Is there DTC P1777?

Go to Step 3.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.

DTC check in ABS/ESP

® control module

1) Check DTC in ABS/ESP

® control module.

Is there DTC U1100?

Go to Step 4.

Go to Step 5.

DTC check
1) Check DTC in ECM referring to “DTC Check in Section

1A in related manual”.

Is there DTC P1674?

Go to “DTC P1674:
CAN Communication
(Bus Off Error) in
Section 1A”.

Check ECM power and
ground circuit. If circuit
is OK, CAN
communication circuit
between ECM and ABS/
ESP

® control module is

open circuit.

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules

communicating by means of CAN.

3) Check CAN communication circuit between control

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Check TCM power and
ground circuit. If circuit
is OK, substitute a
known-good TCM and
recheck.

Repair circuit.

Automatic Transmission/Transaxle: 5A-26

DTC P1874: 4L Switch Circuit Malfunction (Short)

S5JB0E5104044

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and transfer position switch to “4H” position.
4) Keep engine running at idle speed for 10 seconds or more with select lever “D” range.
5) Start vehicle and increase vehicle speed to about 60 km/h (37 mile/h) for 2 minutes.
6) Stop vehicle.
7) Check DTC, pending DTC and freeze frame data.

DTC Troubleshooting

12V

PNK/WHT

BLK

E93-4

16 15 14 13 12 11

4 3

24 23

10 9

18 17

E92

17 16

26 25

15 14

13 12

23 22

11 10 9

21 20 19

8 7

E93

I5JB0A510026-01

1. 4L/N switch

3. 4WD control module

2. TCM

4. Terminal arrangement of TCM connector (viewed from harness side)

DTC Detecting Condition

Trouble Area

Actual transfer position is 4H although TCM detected 4L/N switch
is turned ON with vehicle speed between 29 km/h (18 mile/h) and
88 km/h (55 mile/h). (if equipped with 4L/N switch)
(1 driving cycle detection logic)

• 4L/N switch or its circuit.
• TCM

Step

Action

Yes

Vehicle speed signal check
1) Check DTC in ECM and ABS/ESP

® control module

referring to “DTC Check in Section 1A in related manual”
or “DTC Check in Section 4E”.

Is there DTC P P0500: Vehicle speed sensor (VSS)
malfunction in ECM and/or DTC C1021, C1022, C1025,
C1026, C1031, C1032, C1035 and/or C1036 in ABS/ESP

control module?

Go to applicable DTC
diag. flow.

Go to Step 2.

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check in related
manual”.

Do you have SUZUKI scan tool?

Go to Step 4.

Go to Step 5.

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