Test I: Navigation System Does Not Operate Correctly - The Audio Unit Is Inoperative
PINPOINT TEST I: NAVIGATION SYSTEM DOES NOT OPERATE CORRECTLY - THE AUDIO UNIT IS INOPERATIVEI1-I2:
I2-I4:
I4-I7:
Normal Operation
The navigation module communicates to the audio unit through circuits 1532 (DB/WH) and 1533 (DG/OG) using the controller area network (CAN) protocol. Battery voltage is supplied to the audio unit through circuit 797 (LG/VT). Circuit 194 (PK) provides voltage to the audio unit with the key in the ON or ACC position. The audio unit ground is supplied through circuits 694 (BK/LG).
Possible Causes
- fuse(s)
- circuit 194 (PK) open
- circuit(s) 694 (BK/LG) open
- circuit 797 (LG/VT) open
- circuit 1532 (DB/WH) open, short to ground, or short to voltage
- circuit 1533 (DG/OG) open, short to ground, or short to voltage
- audio unit
- navigation module