Inspection Procedure

1. Disconnect the navigation ECU connector N4.
2. Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester connection	Condition	Specified condition
   GND - Body ground	Always	Below 1 ohms

3. Measure the voltage according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard: 

Fig 1: Identifying Navigation ECU Connector N4 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE OR DIAGNOSTIC TROUBLE CODE TABLE (SEE  PROBLEM SYMPTOMS TABLE   or  DIAGNOSTIC TROUBLE CODE TABLE   )