Inspection Procedure

1. Disconnect the ACC and ECU-IG No. 1 fuses from the main body ECU.
2. Disconnect the TV fuse from the cowl side junction block RH.
3. Measure the resistance according to the values in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

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

NG: REPLACE FUSE 

OK: Go to next Step 

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

   Standard Resistance 

   STANDARD RESISTANCE
   
   

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

3. Measure the voltage according to the value (s) in the table below.
   Fig 1: Identifying F28 Display Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage 

   STANDARD VOLTAGE
   
   

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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