Inspection Procedure

1. Disconnect the connectors from the stereo jack adapter and navigation receiver assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   AUXO - ADPG	Always	Below 1 Ω
   ASGN - VA-	Always	Below 1 Ω
   ARO - VAR+	Always	Below 1 Ω
   ALO - VAL+	Always	Below 1 Ω
   AUXO - Body ground	Always	10 kΩ or higher
   ASGN - Body ground	Always	10 kΩ or higher
   ARO - Body ground	Always	10 kΩ or higher
   ALO - Body ground	Always	10 kΩ or higher

Fig 1: Identifying Stereo Jack Adapter And Navigation Receiver Assembly Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE