Normal Operation

The Restraints Control Module (RCM) measures vehicle yaw rate, lateral acceleration and longitudinal acceleration and then sends the information to the ABS module along a dedicated pair of Controller Area Network (CAN) circuits. This dedicated CAN is used only for communication between the RCM and the ABS module. The yaw rate sensor, lateral accelerometer and longitudinal accelerometer are contained in the RCM.

• DTC U0151:88 (Lost Communication With Restraints Control Module: Bus Off) - This DTC can set if either of the dedicated CAN circuits are open, shorted to ground or shorted to each other. Other DTCs indicating missing messages or invalid signals from the RCM sensors can set as a result of a dedicated CAN fault.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• RCM
• ABS module