Dtc P1678: Can Communication (Reception Error For Bcm) - Suzuki Grand Vitara 2011 Manual

DTC P1678: CAN Communication (Reception Error for BCM)

Wiring Diagram
Refer to "DTC P1674: CAN Communication (Bus Off Error): For Petrol Engine Model".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Reception error of communication data for BCM is
detected for longer than specified time continuously.
(1 driving detection logic but MIL does not light up)
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".
Step
1 Was "Engine and Emission Control System Check"
performed?
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
module and 4WD control module (if equipped), and DTC
No.31 / 33 in keyless start control module (if equipped))?
3 CAN communication error check for ECM
1) Check ECM for DTC.
Is there DTC P1674?
4 ECM, ABS / ESP® control module and BCM connector
check
1) Check for proper connection at each ECM, ABS / ESP®
control module and BCM connector terminals with
ignition switch turned OFF.
2) If connections are OK, recheck ECM for DTC with
engine running.
Is there DTC P1678?
Engine General Information and Diagnosis: For Petrol Engine Model 1A-186
Action
®
Trouble area
• ECM
• BCM
• CAN communication line circuit
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
control
Go to "DTC P1674:
CAN Communication
(Bus Off Error): For
Petrol Engine Model".
Go to Step 5.
S6JB0A1114066
No
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
Go to Step 3.
Go to Step 4.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".