Inspection Procedure

1. Check that the front deicer function operates normally.

   OK: Front deicer function operates normally. 

NG:  GO TO AIR CONDITIONING SYSTEM

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, Passenger Door 

   ACTIVE TEST REFERENCE - DRIVER DOOR, PASSENGER DOOR
   
   

   Tester Display	Test Part	Diagnostic Note
   Mirror Heater	Mirror defogger operation ON / OFF	-

   Result: 

   RESULT REFERENCE
   
   

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

B: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) 

C: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER DOOR ECU) 

A: Go to Next step 

1. Check the operation of the mirror heater.
   1. Measure the resistance between terminals 4 and 12 of the connector.

      Standard resistance: 

      3.57 to 4.83 Ω at 25°C (77°F) 

   2. Apply battery voltage and check the mirror heater operation.
      Fig 1: Identifying Mirror Heater Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      VOLTAGE SPECIFICATION
      
      

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

B: REPLACE OUTER REAR VIEW MIRROR SUB-ASSEMBLY LH 

C: REPLACE OUTER REAR VIEW MIRROR SUB-ASSEMBLY RH 

A: Go to Next step 

1. Disconnect the R14 or R15 mirror connector.
2. Disconnect the D19 or P11 ECU connector.
   Fig 2: Checking Wire Harness (Outer Rear View Mirror LH Or RH - Multiplex Network Door ECU Front LH, RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   Standard resistance: 

   for Driver side 

   RESISTANCE REFERENCE - FOR DRIVER SIDE
   
   

   Tester Connection	Specified Condition
   R14-4 - D19-13 (HTR+)	Below 1 Ω
   R14-12 - D19-22 (HTR-)	Below 1 Ω

   for Front passenger side 

   RESISTANCE REFERENCE - FOR FRONT PASSENGER SIDE
   
   

   Tester Connection	Specified Condition
   R15-4 - P11-13 (HTR+)	Below 1 Ω
   R15-12 - P11-22 (HTR-)	Below 1 Ω

   Result: 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Driver side is not as specified	A
   Front passenger side is not as specified	A
   Driver side is as specified	B
   Front passenger side is as specified	C

B: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 

C: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH 

A: REPAIR OR REPLACE HARNESS OR CONNECTOR