Test A: No Communication With The Audio Unit

PINPOINT TEST A: NO COMMUNICATION WITH THE AUDIO UNIT

A1-A2:

A2 Continued:

Normal Operation
The audio unit receives voltage at all times through circuit SBP11 (BU/RD), delayed accessory voltage through circuit CBP02 (GN), and ground through circuit GD114 (BK/BU). Communication with the diagnostic tool occurs over the controller area network (CAN) through circuits VDB06 (GY/OG) and VDB07 (VT/OG).

Possible Causes
- Fuse
- Circuit SBP11 (BU/RD) open
- Circuit CBP02 (GN) open
- Circuit GD114 (BK/BU) open
- Audio unit