Tests AD: DTC U1900 - CAN Communication Bus Fault - Receive Error (OCS)

PINPOINT TEST AD: DTC U1900 - CAN COMMUNICATION BUS FAULT - RECEIVE ERROR (OCS)

AD1-AD3:

AD4:

Normal Operation
The occupant classification sensor (OCS) module monitors the HS-CAN for messages from the restraints control module (RCM). If the OCS module detects a communication bus fault or missing messages, it will store diagnostic trouble code (DTC) U1900 in memory and illuminate the air bag indicator.

Fault Conditions
The OCS module monitors for the following fault conditions:
- Missing message from the RCM

Possible Causes
A CAN communication bus fault - receive error can be caused by:
- damaged wiring, terminals or connectors.
- a faulted OCS module.
- a faulted RCM.