Rear Window Defogger System Does Not Operate

WINDOW / GLASS: WINDOW DEFOGGER SYSTEM: Rear Window Defogger System does not Operate
- Rear Window Defogger System does not Operate

DESCRIPTION

When the rear window defogger switch on the radio receiver assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through the AVC-LAN and LIN*1 or CAN*2 communication line. When the air conditioning amplifier assembly receives the signal, it turns on the RR DEF relay to operate the rear window defogger.

* *1: w/o Navigation System

* *2: w/ Navigation System

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
* Since the window defogger system uses the AVC-LAN and LIN*1 or CAN*2 communication, first confirm that there is no malfunction in the AVC-LAN and LIN*1 or CAN*2 communication line. Refer to the How to Proceed with Troubleshooting procedure How To Proceed With Troubleshooting.
* *1: w/o Navigation System
* *2: w/ Navigation System

PROCEDURE

1. CHECK AIR CONDITIONING SYSTEM

(a) Check the air conditioning system.

HINT
Both the window defogger system operation signal and air conditioning system operation signal are transmitted to the air conditioning amplifier assembly through same communication line.

OK:

The air conditioning system operates normally.

NG -- GO TO AIR CONDITIONING SYSTEM Symptom Related Diagnostic Procedures
OK -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Air Conditioner (Air Conditioning Amplifier Assembly)





OK:

The window defogger system operates normally.

NG -- INSPECT RR DEF RELAY

OK -- REPLACE RADIO RECEIVER ASSEMBLY Removal

3. INSPECT RR DEF RELAY

(a) Remove the RR DEF relay from the engine room relay block assembly.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE RR DEF RELAY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (RR DEF RELAY POWER SOURCE)

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





Standard Voltage:





Text in Illustration





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

5. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - AIR CONDITIONING AMPLIFIER)

(a) Disconnect the F50 connector.





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

Standard Resistance:





Text in Illustration





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

6. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Install the RR DEF relay to the engine room relay block assembly.





(b) Reconnect the F50 connector.

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

Standard Voltage:





Text in Illustration





NG -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER POWER SOURCE)

(a) Remove the RR DEF relay from the engine room relay block assembly.





(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
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (RR DEF RELAY - RADIO SETTING CONDENSER)

(a) Disconnect the P64 connector.





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

Standard Resistance:





Text in Illustration





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

9. REPLACE RADIO SETTING CONDENSER

(a) Replace the radio setting condenser.

(b) Check the rear window defogger operation.

OK:

The rear window defogger operated normally.

NG -- CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER - REAR WINDOW DEFOGGER WIRE)

OK -- END (RADIO SETTING CONDENSER WAS DEFECTIVE)

10. CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER - REAR WINDOW DEFOGGER WIRE)

(a) Disconnect the P64 connector.





(b) Disconnect the Y8 rear window defogger wire auxiliary battery side connector.

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

Standard Resistance:





Text in Illustration





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

11. INSPECT BACK DOOR GLASS (REAR WINDOW DEFOGGER WIRE)

(a) Disconnect the Y16 rear window defogger wire body ground side connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE (BACK DOOR GLASS)
OK -- Continue to next step.

12. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BODY GROUND)

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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal