Mirror Heater does not Operate with Rear Defogger Switch

MIRROR (EXT): POWER MIRROR CONTROL SYSTEM (w/o Memory): Mirror Heater does not Operate with Rear Defogger Switch
- Mirror Heater does not Operate with Rear Defogger Switch

DESCRIPTION

When the rear window defogger switch on the air conditioning control panel assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through a LIN communication line. When the air conditioning amplifier assembly receives the signal, it turns on the integration relay to operate the mirror heater.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK MIRROR HEATER OPERATION

(a) Check the mirror heater operation Outer Rear View Mirror.

Result





C -- INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (POWER SOURCE)

B -- INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH (POWER SOURCE)
A -- Continue to next step.

2. CHECK DEFOGGER SYSTEM

(a) Check the rear window defogger operation.

OK:

The rear window defogger operated normally.

NG -- GO TO WINDOW DEFOGGER SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. INSPECT INTEGRATION RELAY (POWER SOURCE)





(a) Remove the integration relay from the engine room relay block.

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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BODY GROUND)

(a) Remove the integration relay from the engine room relay block.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - INTEGRATION RELAY)

(a) Disconnect the G4 outer rear view mirror assembly RH connector.

(b) Remove the integration relay from the engine room relay block.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - INTEGRATION RELAY)

(a) Disconnect the H4 outer rear view mirror assembly LH connector.

(b) Remove the integration relay from the engine room relay block.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INTEGRATION RELAY

7. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Remove the integration relay from the engine room relay block.

(b) Disconnect the D75 air conditioning amplifier assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

8. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH (POWER SOURCE)





(a) Disconnect the G4 outer rear view mirror assembly RH connector.

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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR RH - INTEGRATION RELAY)
OK -- Continue to next step.

9. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH





(a) Disconnect the G4 outer rear view mirror assembly RH connector.

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

Standard Resistance:





Text in Illustration





NG -- REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH (FRONT PASSENGER SIDE) Removal

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR RH - BODY GROUND)

10. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (POWER SOURCE)





(a) Disconnect the H4 outer rear view mirror assembly LH connector.

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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR LH - INTEGRATION RELAY)
OK -- Continue to next step.

11. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH





(a) Disconnect the H4 outer rear view mirror assembly LH connector.

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

Standard Resistance:





Text in Illustration





NG -- REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH (DRIVER SIDE) Removal

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR LH - BODY GROUND)