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