Inspection Procedure

1. Disconnect the navigation ECU connector N3.
2. Measure the voltage according to the value (s) in the table below.

   Voltage 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester connection	Condition	Specified condition
   REV - Body ground	Ignition switch is ON. Shift lever is moved to R position.	10 to 14 V
   REV - Body ground	Ignition switch is ON. Shift lever is moved to any position except R.	Below 1 V

   Fig 1: Identifying N3 Navigation ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE NAVIGATION ECU 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR