U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition run time is greater than 1 second. Battery voltage between 9 and 16 volts.

  • Set Condition:

    The PCM doesn't receive a FCM message over the CAN C bus for 7 consecutive seconds. The circuit is continuously monitored.


Possible Causes
  
CAN C BUS OPEN OR SHORTED CONDITION
  
BODY CONTROL MODULE (BCM)
  
POWERTRAIN CONTROL MODULE (PCM)
  

Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.



Diagnostic Test

1.ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.





Is the status Active for this DTC?

Yes
  • Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.


No