Inspection Procedure

1. Use the Techstream to check if the CAN communication system is functioning normally.

   Result: 

   RESULT CHART
   
   

   Result	Proceed to
   CAN DTC is not output	A
   CAN DTC is output	B

B: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to Next Step 

1. Check that the defogger operates normally.

   OK: Defogger operates normally. 

NG: GO TO WINDOW DEFOGGER SYSTEM  (See SYSTEM DESCRIPTION )

OK: Go to Next Step 

1. Select the Active Test, use the Techstream to generate a control command, and then check the mirror heater function.

   Driver Door 

   DRIVER DOOR REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range
   Mirror Heater	Mirror heater operation	OFF / ON

   Passenger Door 

   PASSENGER DOOR REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range
   Mirror Heater	Mirror heater operation	OFF / ON

   Result (Driver Side): 

   RESULT CHART
   
   

   Result	Proceed to
   Outer rear view mirror LH does not operate normally	A
   Outer rear view mirror LH operates normally	B

   Result (Passenger Side): 

   RESULT CHART
   
   

   Result	Proceed to
   Outer rear view mirror RH does not operate normally	C
   Outer rear view mirror RH operates normally	D

B: REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL )

C: Go to step  5

D: REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL )

A: Go to Next Step 

1. Remove the mirror LH (see REMOVAL  ).
2. Check the operation of the mirror heater.
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      4 (HTR+) - 12 (HTR-)	25°C (75°F)	3.0 to 4.0 Ω

   2. Apply battery voltage and check the mirror heater operation.

      OK 

      MEASUREMENT CONDITION SPECIFIED CONDITION REFERENCE CHART
      
      

      Measurement Condition	Specified Condition
      Battery positive (+) → Terminal 4 (HTR+) Battery negative (-) → Terminal 12 (HTR-)	Mirror becomes warm

      Fig 1: Identifying Outer Rear View Mirror LH Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      It will take a short time for the mirror to become warm.

NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH  (See REMOVAL  )

OK: REPLACE FRONT DOOR ECU LH  (See REMOVAL )

1. Remove the mirror RH (see REMOVAL  ).
2. Check the operation of the mirror heater.
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      4 (HTR+) - 12 (HTR-)	25°C (75°F)	3.0 to 4.0 Ω

   2. Apply battery voltage and check the mirror heater operation.

      OK 

      MEASUREMENT CONDITION SPECIFIED CONDITION REFERENCE CHART
      
      

      Measurement Condition	Specified Condition
      Battery positive (+) → Terminal 4 (HTR+) Battery negative (-) → Terminal 12 (HTR-)	Mirror becomes warm

      Fig 2: Identifying Outer Rear View Mirror RH Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      It will take a short time for the mirror to become warm.

NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH  (See REMOVAL  )

OK: REPLACE FRONT DOOR ECU RH  (See COMPONENTS )