Test N: The Rear Entertainment Module (RETM) Does Not Respond To The Scan Tool

PINPOINT TEST N: THE REAR ENTERTAINMENT MODULE (RETM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The rear entertainment module (RETM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the RETM. The RETM shares the MS-CAN with the instrument cluster (IC), the accessory protocol interface module (APIM), the smart junction box (SJB), 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 driver seat module (DSM) (if equipped), the parking aid module (PAM) (if equipped), the liftgate/trunk module (LTM) (if equipped) and the dual climate control seat module (DCSM) (if equipped). Voltage for the RETM is provided by circuit SBP03 (BU/RD). Circuit GD114 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- RETM

N1:

N1-N3:

N3-N4: