POWER MIRROR CONTROL SYSTEM (w/ Memory) > Mirror Heater does not Operate with Rear Defogger Switch

for Preparation Click here


DESCRIPTION

When the rear defogger switch is operated, the mirror heater signal is sent to the A/C amplifier assembly and then to each outer mirror control ECU assembly via CAN communication. Based on the signal, each outer mirror control ECU assembly operates the mirror heater.

WIRING DIAGRAM


B242172E04


INSPECTION PROCEDURE

NOTICE:
  1. The power mirror control system is a part of the CAN communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See CAN Communication System, Click here).
  2. The mirror heater operation is linked with the defogger system or wiper and washer system. Confirm that these systems are operating normally before starting the inspection.

1.CHECK WINDOW DEFOGGER SYSTEM

  1. Check window defogger system operation (Click here).

    OK:
    Window defogger system is normal.



NG
GO TO WINDOW DEFOGGER SYSTEM (Click here)
OK


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Mirror L or Mirror R / Active Test.

  1. Perform an Active Test according to the display on the intelligent tester.

    Mirror L / Mirror R 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Mirror Heater
    		Mirror heater operation
    		ON / OFF
    1. Operate with power switch on (IG) and the vehicle stopped.
    2. This test activates the mirror heater on or off.
    3. Mirror heater operation can be confirmed by touch.

    Result:

    Result
    		Proceed to
    Mirror heater operation on both mirrors are not normal
    		A
    Mirror heater operation on RH side mirror is not normal
    		B
    Mirror heater operation on LH side mirror is not normal
    		C



B
Go to step 3

C
Go to step 5
A

REPLACE A/C AMPLIFIER ASSEMBLY (Click here)  

3.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH


    B187465E18

  1. Remove the outer rear view mirror assembly RH (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z7-4 (HTR+) - z7-12 (HTR-)
    		25°C (77°F)
    		2.4 to 4.4 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Outer Rear View Mirror Assembly RH)



NG
Go to step 4
OK

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER SIDE) (Click here)  

4.INSPECT OUTER MIRROR RH


    B273334E01

  1. Remove the outer mirror RH (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		25°C (77°F)
    		2.4 to 4.4 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Outer Mirror RH)



NG
REPLACE OUTER MIRROR RH (Click here)
OK

REPLACE OUTER MIRROR ACTUATOR ASSEMBLY RH (Click here)  

5.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH


    B187465E19

  1. Remove the outer rear view mirror assembly LH (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z6-4 (HTR+) - z6-12 (HTR-)
    		25°C (77°F)
    		2.4 to 4.4 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Outer Rear View Mirror Assembly LH)



NG
Go to step 6
OK

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE) (Click here)  

6.INSPECT OUTER MIRROR LH


    B273167E01

  1. Remove the outer mirror LH (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		25°C (77°F)
    		2.4 to 4.4 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Outer Mirror LH)



NG
REPLACE OUTER MIRROR LH (Click here)
OK

REPLACE OUTER MIRROR ACTUATOR ASSEMBLY LH (Click here)