Test I: The Rear Audio/Climate Control Module Does Not Respond To The Scan Tool

PINPOINT TEST I: THE REAR AUDIO/CLIMATE CONTROL MODULE DOES NOT RESPOND TO THE SCAN TOOL

I1-I3:

I3-I4:

Normal Operation
The rear audio/climate control module communicates with the scan tool through the standard corporate protocol (SCP) communication network. Circuits 914 (TN/OG) (SCP +) and 915 (PK/LB) (SCP-) provide the network connection to the rear audio/climate control module. The rear audio/climate control module shares the SCP network with the lighting control module (LCM), the driver seat module (DSM) (if equipped), the driver door module (DDM), the navigation module (if equipped), the electronic automatic temperature control (EATC) module and the instrument cluster. Voltage for the rear audio/climate control module is provided by circuit 1499 (PK/LG). Circuit 676 (PK/OG) provides ground.

Possible Causes
- Fuse
- Circuit 676 (PK/OG) open
- Circuit 1499 (PK/LG) open
- Circuit 914 (TN/OG) open (SCP +)
- Circuit 915 (PK/LB) open (SCP -)
- Rear audio/climate control module