Mirror Heater does not Operate with Rear Defogger Switch

DESCRIPTION

with Navigation System:

When the mirror defogger switch, which is built into the multi-media module display assembly, is operated, the operation signals are transmitted to the A/C amplifier assembly through AVC-LAN and BEAN. When the A/C amplifier assembly receives the signals, it turns on the MIR HTR relay to operate the mirror defogger.

without Navigation System:

When the mirror defogger switch, which is built into the integration control & panel, is operated, the operation signals are transmitted to the A/C amplifier assembly through AVC-LAN and BEAN. When the A/C amplifier assembly receives the signals, it turns on the MIR HTR relay to operate the mirror defogger.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK DTCs

1. Select the DTC check on the intelligent tester to check for communication errors.
   

   Result:

   Not output DTC codes	A
   Output DTC codes (Multiplex communication)	B
   Output DTC codes (CAN communication)	C

B	GO TO MULTIPLEX COMMUNICATION SYSTEM
C	GO TO CAN COMMUNICATION SYSTEM

A

2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER

1. Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the mirror defogger operation.
   

   Air Conditioner:

   Item	Test Details
   Mirror Heater	Mirror heater operation: OFF/ON

   
   

   Result:

   OK (with Navigation System)	A
   OK (without Navigation System)	B
   NG	C

B	Go to step 5
C	Go to step 9

A

3. REPLACE MULTI-MEDIA MODULE DISPLAY

1. Replace the multi-media module display.

NEXT

4. CONFIRM MIRROR DEFOGGER OPERATION

1. Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates.

NG	REPLACE A/C AMPLIFIER ASSEMBLY

OK
END

5. REPLACE INTEGRATION CONTROL & PANEL

1. Replace the integration control & panel.

NEXT

6. CONFIRM MIRROR DEFOGGER OPERATION

1. Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates.

OK	END

NG

7. REPLACE RADIO RECEIVER ASSEMBLY

1. Replace the radio receiver assembly.

NEXT

8. CONFIRM MIRROR DEFOGGER OPERATION

1. Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates.

NG	REPLACE A/C AMPLIFIER ASSEMBLY

OK
END

9. PERFORM ACTIVE TEST BY INTELLIGENT TESTER

1. Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the MIR HTR relay operation.

   HINT:

   Check that operation sound of the MIR HTR relay can be heard.

OK	Go to step 13

NG

10. INSPECT MIR HTR RELAY

Click here

NG	REPLACE MIR HTR RELAY

OK

11. CHECK WIRE HARNESS (MIR HTR RELAY)

1. Disconnect the MIR HTR relay.

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

   Voltage:

   Tester Connection	Condition	Specified Condition
   1 - Body ground	Engine switch on (IG)	10 to 14 V

NG	REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR

OK

12. CHECK WIRE HARNESS (MIR HTR RELAY - A/C AMPLIFIER ASSEMBLY)

1. Disconnect the MIR HTR relay and A/C amplifier assembly connector.

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

   Resistance:

   Tester Connection	Condition	Specified Condition
   2 - J58-2 (MHTR)	Always	Below 1 Ω
   2 - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE A/C AMPLIFIER ASSEMBLY

13. INSPECT MIR HTR RELAY

Click here

NG	REPLACE MIR HTR RELAY

OK

14. CHECK WIRE HARNESS (MIR HTR RELAY - BATTERY POSITIVE AND BODY GROUND)

1. Disconnect the MIR HTR relay.

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

   Voltage:

   Tester Connection	Condition	Specified Condition
   5 - Body ground	Engine switch on (IG)	10 to 14 V

NG	REPAIR OR REPLACE MIR HTR FUSE OR HARNESS

OK

15. CHECK WIRE HARNESS (MIR HTR RELAY - OUTER MIRROR ASSEMBLY)

1. Disconnect the MIR HTR relay and outer rear view mirror assembly connectors.

2. Measure the resistance according to the value(s) in the table below.(*): Outer rear view mirror assembly RH
   

   Resistance:

   Outer rear view mirror assembly LH:

   Tester Connection	Condition	Specified Condition
   3 - M15-3 (HTR+)	Always	Below 1 Ω
   3 - Body ground	Always	10 kΩ or higher
   M15-9 (HTR-) - Body ground	Always	Below 1 Ω

   Outer rear view mirror assembly RH:

   Tester Connection	Condition	Specified Condition
   3 - L14-3 (HTR+)	Always	Below 1 Ω
   3 - Body ground	Always	10 kΩ or higher
   L14-9 (HTR-) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE OUTER REAR VIEW MIRROR ASSEMBLY