Can Communication Circuit Check; Dtc P1676: Can Communication (Reception Error For Tcm (For A/T Model)) - Suzuki GRAND VITARA JB416 Service Manual

Step

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?
15 DTC check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Check ECM for DTC.
Is there DTC P1674?

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

Wiring Diagram
Refer to "DTC P1674: CAN Communication (Bus Off Error): ".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Reception error of communication data for TCM is
detected for longer than specified time continuously.
(1 driving detection logic)
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: in related manual".
Step
1 Was "Engine and Emission Control System Check"
performed?
Action
Action
Engine General Information and Diagnosis:
Yes
Go to Step 15.
Substitute a known-
good ECM and recheck.
Trouble area
• ECM
• TCM (for A/T model)
• CAN communication line circuit
Yes
Go to Step 2.
1A-35
No
Repair or replace
defective CAN
communication circuit.
Check ABS or ESP®
control module power
and ground circuits. If
circuits are OK,
substitute a known-
good ABS or ESP® and
recheck.
S5JB0E1104065
No
Go to "Engine and
Emission Control
System Check: in
related manual".