Dtc P1678: Can Communication (Reception Error For Bcm) - Suzuki Swift Sport 2004 Service & Repair Manual

DTC P1678: CAN Communication (Reception Error for BCM)

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 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
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to "Inspection of ECM and Its Circuits".
• Upon completion of inspection and repair work, perform "DTC Confirmation Procedure" and
confirm that the trouble has been corrected.
Step
1 Was "Engine and Emission Control System Check"
performed?
2 CAN communication error check for ECM
1) Check ECM for DTC.
Is there DTC P1674?
3 ECM, ABS 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?
4 DTC check in BCM
1) Check DTC U1073 in BCM.
Is it indicated?
5 DTC check of ABS/ESP® control module
1) Check DTC U1073 in ABS/ESP® control module.
Is it indicated?
Action
Engine General Information and Diagnosis:
Trouble area
• ECM
• ABS/ESP® control module
• BCM
• CAN communication circuit
Yes
Go to Step 2.
Go to "DTC P1674:
CAN Communication
(Bus Off Error)".
Go to Step 4.
Go to "DTC U1073 (No.
1073): Control Module
Communication Bus Off
in Section 10B".
Go to "DTC U1073:
Control Module
Communication Bus Off
in Section 4E".
1A-149
S7RS0B1104065
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to Step 5.
Go to Step 6.