Test D: The Audio System Illumination Is Inoperative
PINPOINT TEST D: THE AUDIO SYSTEM ILLUMINATION IS INOPERATIVENormal Operation
With the parking lamps on, the lighting control module (LCM) supplies a variable pulse width modulated (PWM) voltage to the audio unit on circuit 484 (OG/BK). The base audio unit illumination is grounded through circuit 57 (BK). The dual media audio unit is grounded through circuit 694 (BK/LG).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Audio unit
D1-D2:
