Inspection Procedure

1. Remove the ACC and ECU-IG No. 1 fuses from the cowl side junction block LH.
2. Remove the TV fuse from the cowl side junction block RH.
3. Measure the resistance of according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   ACC fuse	Always	Below 1 Ω
   ECU-IG No. 1 fuse	Always	Below 1 Ω
   TV fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: Go to Next Step 

1. Disconnect the F28 display connector.
2. Measure the resistance of according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   F28-10(GND1) - Body ground	Always	Below 1 Ω

3. Measure the voltage of according to the value(s) in the table below.
   Fig 1: Identifying Display And Navigation Module Display Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   F28-1 (+B1) - F28-10 (GND1)	Always	11 to 14 V
   F28-2(ACC) - F28-10 (GND1)	Engine switch on (ACC)	11 to 14 V
   F28-3(IG) - F28-10 (GND1)	Engine switch on (IG)	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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