Test J: The Audio Unit Does Not Respond to the Scan Tool

PINPOINT TEST J: THE AUDIO UNIT DOES NOT RESPOND TO THE SCAN TOOL

J1-J2:

J2-J3:

J4:

Normal Operation
Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the audio unit. The audio unit shares the MS-CAN network with the instrument cluster, the smart junction box (SJB), the electronic automatic temperature control (EATC) module (if equipped), the satellite radio receiver (if equipped), the digital versatile disc (DVD) player, the driver seat module (DSM) (if equipped), the power running board module (if equipped) and the parking aid module (if equipped). Voltage for the audio unit is provided by circuits CBP12 (GN/WH) and SBP03 (BU/RD). Circuit GD114 (BK/BU) provides ground.

Possible Causes
- Fuse
- Circuit CBP12 (GN/WH) open
- Circuit GD114 (BK/BU) open
- Circuit SBP03 (BU/RD) open
- Circuit VDB06 (GY/OG) open (MS-CAN +)
- Circuit VDB07 (VT/OG) open (MS-CAN -)
- Audio unit