Inspection Procedure

HINT:

Before performing this procedure, check that DTCs for the multiplex communication system are not output (See DTC CHECK / CLEAR ).

1. CHECK HARNESS AND CONNECTOR (BATTERY - COMBINATION SWITCH) 
   1. Disconnect the connector from the combination switch ECU.
   2. Measure the voltage according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester connection	Condition	Specified Condition
      D13-1 - Body ground	Always	10 to 14 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 1: Identifying Combination Switch ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step. 

2. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH CIRCUIT) 
   1. Measure the voltage according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester connection	Condition	Specified Condition
      D13-2 - Body ground	Ignition switch on (IG)	10 to 14 V
      D13-2 - Body ground	Ignition switch off	Below 1 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 2: Identifying Combination Switch ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step. 

3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH - BODY GROUND) 
   1. Measure the resistance according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester connection	Condition	Specified Condition
      D13-5 - Body ground	Always	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 3: Identifying Combination Switch ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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