Diagnosis Procedure

1. Perform Self Diagnostic Result for MULTI AV.
2. Erase Self Diagnostic Result. Turn ignition switch OFF.
3. Turn ignition switch ON. Perform Self Diagnostic Result again.

Is DTC U1684, U1687, U168C or U168F detected?

YES 

Refer to DIAGNOSIS PROCEDURE  (rear door speaker) or DIAGNOSIS PROCEDURE  (rear door tweeter).

NO 

Refer to INTERMITTENT INCIDENT .