Standard Body Module Serial Data CKT

The PCM. uses the Class 2 Serial Data circuit to communicate with the vehicle Body Control Module (BCM) and other devices. The PCM ensures that communication remains established by monitoring the Serial Data circuit for state of health messages from the other devices using the circuit. If the PCM detects a loss of the state of health Serial Data message from the BCM, DTC U1064 will set.

For information concerning the various devices that use the Class 2 Serial Data circuit, refer to [1][2]Data Link Communications Operation in Serial Data.