Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 58

1A-179 Engine General Information and Diagnosis: For Petrol Engine Model

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.

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to 
“Precautions for DTC Troubleshooting: For Petrol Engine Model”.

 

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 detection logic)

• ECM
• BCM
• TCM (for A/T model)
• Keyless start control module (if equipped)
• ABS  or  ESP

® control module 

• 4WD control module (if equipped)
• Combination meter
• CAN communication line circuit
• Steering angle sensor (for vehicle with ESP

®)

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check” 
performed?

Go to Step 2.

Go to “Engine and 
Emission Control 
System Check: For 
Petrol Engine Model”.

2

DTC check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Check ECM, TCM (for A/T model), ABS / ESP

® control 

module, 4WD control module (if equipped), keyless start 
control module (if equipped) and BCM for DTC.

Is there any DTC(s) other than CAN communication DTC(s) 
at each control module (other than DTC P1618, P1674, 
P1676, P1678, P1685 in ECM, DTC P1774, P1777, P1778 
in TCM (for A/T model), DTC U1073, U1100, U1101, U1121, 
U1126, U1139, U1140, U1144 in BCM, ABS / ESP

®

 control 

module and 4WD control module (if equipped) and DTC 
No.31 / 33 in keyless start control module (if equipped))?

Go to applicable DTC 
diag. flow.

Go to Step 3.

Engine General Information and Diagnosis: For Petrol Engine Model 1A-180

3

ECM, TCM (for A/T model), BCM, ABS / ESP

® control 

module, 4WD control module (if equipped), combination 
meter, keyless start control module (if equipped) and 
steering angle sensor (for vehicle with ESP

®) 

connectors check
1) Check for proper connection at each ECM, TCM (for A/T 

model), BCM, ABS / ESP

® control module, 4WD control 

module (if equipped), combination meter, keyless start 
control module (if equipped) and steering angle sensor 
(for vehicle with ESP

®) connector terminals with ignition 

switch turned OFF.

2) If connections are OK, recheck ECM for DTC with 

engine running.

Is there DTC P1674?

Go to Step 4.

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

4

ECM power and ground circuit check
1) Check ECM power and ground circuit referring to “ECM 

Power and Ground Circuit Check: For Petrol Engine 
Model”.

Are they in good condition?

Go to Step 5.

Repair ECM power and/
or ground circuits.

5

DTC check in BCM, TCM (for A/T model), ABS / ESP

® 

control module, 4WD control module (if equipped) and 
keyless start control module (if equipped) (bus off)
1) Check DTC(s) in TCM (for A/T model), ABS / ESP

® 

control module, 4WD control module (if equipped) and 
BCM.

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS / ESP

®

 control module and 4WD control module 

(if equipped) and/or DTC No.33 in keyless start control 
module (if equipped)?

Go to Step 6.

Go to Step 7.

6

DTC check in ECM (bus off)
1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Check TCM (for A/T model), BCM, ABS / ESP

® control 

module and 4WD control module (if equipped) for 
DTC(s).

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS / ESP

®

 control module, 4WD control module (if 

equipped) and/or DTC No.33 in keyless start control module 
(if equipped)?

Go to Step 7.

CAN communication 
circuit wire between 
ECM and ABS / ESP

® 

control module is open 
or high resistance. If 
wires are OK, substitute 
a known-good ECM and 
recheck.

7

DTC check in ECM
1) Connect connectors to ECM and disconnect connector 

from BCM with ignition switch turned OFF.

2) Check ECM for DTC(s).

Is there DTC P1674?

Go to Step 8.

CAN communication 
circuit wire between 
BCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good BCM and recheck.

Step

Action

Yes

No

1A-181 Engine General Information and Diagnosis: For Petrol Engine Model

8

DTC check in ECM
1) Disconnect connectors from TCM (for A/T model) with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 9.

CAN communication 
circuit wire between 
TCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good TCM (for A/T 
model) and recheck.

9

DTC check in ECM
1) Disconnect connector from keyless start control module 

(if equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 10.

CAN communication 
circuit wire between 
keyless start control 
module and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good keyless start 
control module and 
recheck.

10 DTC check in ECM

1) Disconnect connector from combination meter with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 11.

CAN communication 
circuit wire between 
combination meter and 
CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, substitute a 
known-good 
combination meter or 
keyless start control 
module (if equipped) 
and recheck.

11 DTC check in ECM

1) Disconnect connector from 4WD control module (if 

equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 12.

CAN communication 
circuit wire between 
4WD control module 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, substitute a 
known-good 4WD 
control module and 
recheck.

12 DTC check

1) Disconnect connector from steering angle sensor 

(vehicle equipped with ESP

® control module) with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 13.

CAN communication 
circuit wire between 
steering angle sensor 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, check steering 
angle sensor power and 
ground circuits. If 
circuits are OK, 
substitute a known-
good steering angle 
sensor and recheck.

Step

Action

Yes

No

Engine General Information and Diagnosis: For Petrol Engine Model 1A-182

DTC P1676: CAN Communication (Reception Error for TCM (for A/T model))

S6JB0A1114065

Wiring Diagram
Refer to “DTC P1674: CAN Communication (Bus Off Error): For Petrol Engine Model”.

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.

13 ABS or EPS

® control module check

1) Measure resistance at following connector terminals.

• Between “WHT/BLU” terminal and “WHT” terminal of 

ABS or ESP

® control module connector.

• Between “WHT/RED” terminal and “RED” terminal of 

ABS or ESP

® control module connector.

Is measured resistance below 1 

Ω

?

Go to Step 14.

Substitute a known-
good ABS or ESP

® 

control module and 
recheck.

14 CAN communication circuit check

1) Disconnect connectors from all control modules (ECM, 

TCM (if equipped), BCM, ABS or ESP

® control module, 

4WD control module (if equipped), keyless start control 
module (if equipped), combination meter, steering angle 
sensor (if equipped)) with ignition switch turned OFF.

2) Check that CAN communication circuit is as follows.

• All wire harness resistance of CAN communication 

circuit is less than 1 

Ω between each control module.

• Insulation resistance between CAN communication 

circuit wires is infinity at each control module 
connector.

• Insulation resistance between each CAN 

communication circuit wire and vehicle body ground is 
infinity at each control module connector.

• Circuit voltage of CAN communication circuit is 0 V 

with ignition switch turned ON.

Are they in good condition?

Go to Step 15.

Repair or replace 
defective CAN 
communication circuit.

15 DTC check

1) Connect connectors to ECM with ignition switch turned 

OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Substitute a known-
good ECM and recheck.

Check ABS or ESP

® 

control module power 
and ground circuits. If 
circuits are OK, 
substitute a known-
good ABS or ESP

® and 

recheck.

Step

Action

Yes

No

DTC detecting condition

Trouble area

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

• ECM
• TCM (for A/T model)
• CAN communication line circuit