Test M: Loud Popping Sound When Cycling the Ignition Switch

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

M1:

M1 Continued:

Normal Operation
When the vehicle is started, voltage is supplied to the rear control unit (RCU) (also referred to as the audio unit) through circuit 655 (RD/OG). When the circuit is operating correctly, the connections are secure and there are no gaps, which could cause an arc resulting in a loud popping sound.

Possible Causes
- Circuit 655 (RD/OG) short to voltage
- RCU