Test U: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding

PINPOINT TEST U: NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

Normal Operation
The medium speed controller area network (MS-CAN) uses an unshielded twisted pair cable. Circuits VDB06 (GY/OG) and VDB07 (VT/OG) provide the network connection to all modules on the network. The smart junction box (SJB), the instrument cluster (IC), the HVAC module (if equipped), the audio control module (ACM), the audio digital signal processing (DSP) module (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the rear entertainment module (RETM) (if equipped), the accessory protocol interface module (APIM), the parking aid module (PAM) (if equipped), the liftgate/trunk module (LTM) (if equipped), the driver seat module (DSM) (if equipped), and the dual climate control seat module (DCSM) (if equipped) all communicate with the scan tool using the MS-CAN.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SJB
- IC
- ACM
- APIM
- HVAC module (if equipped)
- PAM (if equipped)
- LTM (if equipped)
- RETM (if equipped)
- SDARS module (if equipped)
- DSP module (if equipped)
- DSM (if equipped)
- DCSM (if equipped)

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