Engine General Information and Diagnosis: 1A-149
DTC P1678: CAN Communication (Reception Error for BCM)
S7RS0B1104065
Wiring Diagram
Refer to “DTC P1674: CAN Communication (Bus Off Error)”.
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
• 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.
DTC detecting condition Trouble area
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)
•ECM
• ABS/ESP® control module
•BCM
• CAN communication circuit
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”.
2 CAN communication error check for ECM
1) Check ECM for DTC.
Is there DTC P1674?
Go to “DTC P1674:
CAN Communication
(Bus Off Error)”.
Go to Step 3.
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?
Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4 DTC check in BCM
1) Check DTC U1073 in BCM.
Is it indicated?
Go to “DTC U1073 (No.
1073): Control Module
Communication Bus Off
in Section 10B”.
Go to Step 5.
5 DTC check of ABS/ESP® control module
1) Check DTC U1073 in ABS/ESP® control module.
Is it indicated?
Go to “DTC U1073:
Control Module
Communication Bus Off
in Section 4E”.
Go to Step 6.
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