Inspection Procedure

1. Disconnect the navigation controller E18 connector.
   Fig 1: Disconnecting Navigation Controller E18 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE SPECIFIED CONDITION
   
   

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

3. Measure the voltage according to the value(s) in the table below.
   STANDARD VOLTAGE SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   +B - GND	Always	10 to 14 V
   ACC - GND	Ignition switch on (ACC)	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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