Test E: Loud Popping Sound When Cycling The Ignition Switch

PINPOINT TEST E: LOUD POPPING SOUND WHEN CYCLING THE IGNITION SWITCH

Normal Operation
The start input circuit 325 (DB/OG) is sent to the audio control module (ACM) when the key is turned to START. Upon receiving this signal, the ACM mutes all speaker outputs to eliminate the possibility of speaker pops during engine cranking.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Subwoofer
- ACM

E1-E2: