Inspection Procedure

1. NG: Replace microphone (See  PROCEDURE  ). 
2. OK: Go To Next Step. 

1. NG: Replace overhead J/B (See  PROCEDURE  ). 
2. OK: Go To Next Step. 

PREPARATION: 

Disconnect the overhead J/B and navigation ECU connectors.

CHECK: 

Check continuity of the wire harness between terminals of the overhead J/B and those of the navigation ECU.

OK: 

1. Continuity 

1. NG: Replace or repair wire harness or connector. 
2. OK: Check and replace navigation ECU.