Inspection Procedure

HINT

• Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output (See DIAGNOSTIC TROUBLE CODE CHART )
• Before starting the following procedure, verify that the rain sensor tape is correctly installed

1. INSPECT RAIN SENSOR 
   1. Disconnect the R7 rain sensor connector
   2. Measure the voltage according to the value(s) in the table below

      Standard Voltage 

      TESTER CONNECTION TESTER CONNECTION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      R7-1 (SIG) - R7-3 (ES)	Engine switch on (IG)	11 to 14 V
      	Engine switch off	Below 1 V

   Fig 1: Identifying R7 Rain Sensor Connector Terminal
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 2 

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

2. INSPECT OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY) 
   1. Measure the voltage according to the value(s) in the table below

      Standard Voltage 

      TESTER CONNECTION TESTER CONNECTION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      R5-23 (IG2) - R5-40 (GND2)	Engine switch on (IG)	11 to 14 V
      	Engine switch off	Below 1 V

   NG: Go to step 3 

   Fig 2: Identifying R5 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK) 

3. CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK - BATTERY AND BODY GROUND) 
   1. Disconnect the R5 overhead junction block connector.
   2. Measure the resistance according to the value(s) in the table below

      Standard Resistance 

      TESTER CONNECTION TESTER CONNECTION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      R5-39 (GND) - Body ground	Always	Below 1 Ω

   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION TESTER CONNECTION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      R5-21 (IG) - R5-39 (GND)	Engine switch on (IG)	11 to 14 V
      	Engine switch off	Below 1 V

   Fig 3: Identifying R5 Connector Terminal
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY)  (See PERSONAL LIGHT )