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

PINPOINT TEST L: 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 is only on vehicles equipped with rear seat entertainment. The RETM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the driver seat module (DSM) (if equipped), the RETM (if equipped), the power running board (PRB) module (if equipped), and the parking aid module (PAM) (if equipped). Voltage for the RETM is provided by circuit SBB41 (RD). Circuit GD114 (BK/BU) provides ground.

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

L1-L2:

L2-L3:

L4: