Inspection Procedure

1. Disconnect the navigation controller E18 connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

3. Measure the voltage according to the value(s) in the table below.
   Fig 1: Disconnecting Navigation Controller E18 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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