Mirror Heater Does Not Operate With Rear Defogger Switch
MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: Mirror Heater does not Operate with Rear Defogger Switch
Mirror Heater does not Operate with Rear Defogger Switch
DESCRIPTION
w/ Navigation System:
When the window defogger switch, which is built into the multi-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 heater.
w/o Navigation System
When the mirror heater switch, which is built into the integration control and 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 heater.
NOTICE: The power mirror control system is a part of the multiplex 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 Multiplex Communication System How to Proceed With Troubleshooting).
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE: The power mirror control system is a part of the multiplex 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 Multiplex Communication System How to Proceed With Troubleshooting).
PROCEDURE
1. CHECK FOR DTC
(a) Check for multiplex communication system DTCs.
Result:
C -- GO TO MULTIPLEX COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
B -- CHECK FOR DTC
A -- Continue to next step.
2. CHECK FOR DTC
(a) Check for navigation system DTCs Reading and Clearing Diagnostic Trouble Codes.
Result:
B -- PERFORM ACTIVE TEST USING TECHSTREAM
A -- GO TO NAVIGATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
3. CHECK FOR DTC
(a) Check for audio and visual system DTCs Audio and Visual System.
Result:
B -- GO TO AUDIO AND VISUAL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
A -- Continue to next step.
4. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(d) According to the display on the Techstream, perform the Active Test.
Air Conditioner:
Result:
C -- PERFORM ACTIVE TEST USING TECHSTREAM
B -- REPLACE INTEGRATION CONTROL AND PANEL
A -- Continue to next step.
5. REPLACE MULTI-DISPLAY
(a) Replace the multi-display Removal.
NEXT -- Continue to next step.
6. CONFIRM MIRROR HEATER OPERATION
(a) Turn the engine switch on (IG).
(b) Press the window defogger switch, and check that the mirror heaters operate.
OK:
Mirrors become warm.
NG -- REPLACE A/C AMPLIFIER ASSEMBLY
OK -- END
7. REPLACE INTEGRATION CONTROL AND PANEL
(a) Replace the integration control and panel Removal.
NEXT -- Continue to next step.
8. CONFIRM MIRROR HEATER OPERATION
(a) Turn the engine switch on (IG).
(b) Press the window defogger switch, and check that the mirror heaters operate.
OK:
Mirrors become warm.
NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- END
9. REPLACE RADIO RECEIVER ASSEMBLY
(a) Replace the radio receiver assembly Removal.
NEXT -- Continue to next step.
10. CONFIRM MIRROR HEATER OPERATION
(a) Turn the engine switch on (IG).
(b) Press the window defogger switch, and check that the mirror heaters operate.
OK:
Mirrors become warm.
NG -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
OK -- END
11. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Select the Active Test, use the Techstream to issue a control command, and then check MIR HTR relay operation.
(b) Check that operation sound of the MIR HTR relay can be heard.
OK:
Operation sound of the MIR HTR relay can be heard.
NG -- INSPECT MIR HTR RELAY
OK -- Continue to next step.
12. INSPECT MIR HTR RELAY Removal.
NG -- REPLACE MIR HTR RELAY
OK -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (MIR HTR RELAY - BATTERY)
(a) Disconnect the MIR HTR relay.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MIR HTR RELAY - OUTER REAR VIEW MIRROR)
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (MIR HTR RELAY - OUTER REAR VIEW MIRROR)
(a) Disconnect the MIR HTR relay and outer rear view mirror assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Outer Rear View Mirror Assembly LH
Outer Rear View Mirror Assembly RH
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MIR HTR RELAY - OUTER REAR VIEW MIRROR)
OK -- REPLACE OUTER REAR VIEW MIRROR
15. INSPECT MIR HTR RELAY Removal.
NG -- REPLACE HEATER MIRROR RELAY
OK -- Continue to next step.
16. CHECK HARNESS AND CONNECTOR (MIR HTR RELAY - BATTERY)
(a) Disconnect the MIR HTR relay.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MIR HTR RELAY - OUTER REAR VIEW MIRROR)
OK -- Continue to next step.
17. CHECK WIRE HARNESS (MIR HTR RELAY - A/C AMPLIFIER ASSEMBLY)
(a) Disconnect the MIR HTR relay and A/C amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE MIR HTR FUSE OR HARNESS
OK -- REPLACE AIR CONDITIONING AMPLIFIER