Inspection Procedure

1. Measure the resistance and of the ECU connector.
   Fig 1: Identifying ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P5-1 (REV) - Body ground	Shift lever is on R position	10 to 14 V
   P5-1 (REV) - Body ground	Shift lever is not on R	Below 1 V

NG: REPLACE PASSENGER SIDE JUNCTION BLOCK 

OK: Go to next step 

1. Disconnect the N3 and P5 ECU connectors.
   Fig 2: Identifying N3 And P5 ECU Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   N3-14 (REV) - P5-1 (BACK)	Below 1 Ω
   N3-14 (REV) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE NAVIGATION ECU