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

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

C1-C3:

C4-C5:

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 module shares the HS-CAN with the powertrain control module (PCM), the four wheel drive (4WD) module, the occupant classification sensor module, the smart junction box (SJB), and the instrument cluster. Voltage for the RCM is provided by circuit CBP08 (GY/YE), and the RCM is case grounded.

Possible Causes
- Fuse
- Circuit VDB04 (WH/BU) open (HS-CAN +)
- Circuit VDB05 (WH) open (HS-CAN -)
- Circuit CBP08 (GY/YE) open
- Case ground open
- RCM