Test D: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool

PINPOINT TEST D: THE RESTRAINTS CONTROL MODULE (RCM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The RCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the RCM. The RCM shares the HS-CAN with the PCM, the transmission control module (TCM), the ABS module, the 4X4 control module (if equipped), the air suspension module (if equipped) and the instrument cluster (IC). Voltage for the RCM is provided by circuit CBP32 (GN/VT), and the RCM is case grounded.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Case ground open
- RCM

D1-D2:

D2-D4:

D4-D5: