Audio Unit and Multifunction Switch Circuit Inspection

1. Turn ignition switch OFF.
2. Disconnect audio unit connector and multifunction switch connector.
3. Check continuity between audio unit harness connector M87 terminal 15 (R/L) and multifunction switch harness connector M83 terminal 13 (R/L).
   1. 15 (R/L) - 13 (R/L): Continuity should exist. 
4. Check continuity between audio unit harness connector M87 terminal 16 (Y) and multifunction switch harness connector M83 terminal 12 (Y).
   1. 16 (Y) - 12 (Y): Continuity should exist. 

OK or NG 

1. OK: Replace audio unit.
2. NG: Repair harness or connector.

Fig 1: Checking Audio Unit And Multifunction Switch Open Circuit Connector

Courtesy of NISSAN MOTOR CO., U.S.A.