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

* w/ Navigation System

When the rear defogger switch built into the display and navigation module display is operated, a signal is sent from the display and navigation module display to the air conditioning amplifier assembly via AVC-LAN and BEAN communication. When the air conditioning amplifier assembly receives that signal, it turns the DEFOG relay on to operate the rear defogger.

* w/o Navigation System

When the rear defogger switch built into the integration control and panel assembly is operated, a signal is sent from the display and navigation module display to the air conditioning amplifier assembly via AVC-LAN and BEAN communication. When the air conditioning amplifier assembly receives that signal, it turns the DEFOG relay on to operate the rear defogger.

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 BEAN communication, first confirm that there is no malfunction in the AVC-LAN and BEAN communication line. Refer to the How to Proceed with Troubleshooting procedure How To Proceed With Troubleshooting.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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





Result:





C -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal

B -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
A -- Continue to next step.

2. INSPECT DEFOGGER RELAY (DEFOG)

(a) Remove the DEFOG relay from the luggage room junction block assembly.





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

Standard Resistance:





NG -- REPLACE DEFOGGER RELAY (DEFOG)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (BATTERY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Reconnect the DEFOG relay to the luggage room junction block assembly.





(b) Disconnect the J58 connector from the air conditioning amplifier assembly.

(c) 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.

4. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Reconnect the J58 connector to the air conditioning amplifier assembly.





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

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

Standard Voltage:





Text in Illustration





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

5. REPLACE RADIO SETTING CONDENSER (INSTALLED BELOW LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY)

(a) Replace the radio setting condenser (installed below luggage room junction block assembly).

(b) Check the rear window defogger operation.

OK:

The rear window defogger operates normally.

NG -- CHECK HARNESS AND CONNECTOR (BATTERY - DEFOGGER RELAY (DEFOG))

OK -- END (RADIO SETTING CONDENSER (INSTALLED BELOW LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY) WAS DEFECTIVE)

6. CHECK HARNESS AND CONNECTOR (BATTERY - DEFOGGER RELAY (DEFOG))

(a) Remove the DEFOG relay from the luggage room junction block assembly.





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

Standard Voltage:





Text in Illustration





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

7. CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER (INSTALLED INSIDE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY) - BODY GROUND)

(a) Remove the defogger fuse and radio setting condenser (installed inside luggage room junction block assembly) from the luggage room junction block assembly.





(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.

8. REPLACE RADIO SETTING CONDENSER (INSTALLED INSIDE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY)

(a) Replace the radio setting condenser (installed inside luggage room junction block assembly).

(b) Check the rear window defogger operation.

OK:

The rear window defogger operates normally.

NG -- END (RADIO SETTING CONDENSER (INSTALLED INSIDE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY) WAS DEFECTIVE)
OK -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER (INSTALLED BELOW LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY) - BODY GROUND)

(a) Disconnect the g1 back window glass battery side connector.





(b) Disconnect the DEFOG relay.

(c) Disconnect the Q26 radio setting condenser connector (installed below luggage room junction block assembly).

(d) 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.

10. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY - BACK WINDOW GLASS)

(a) Remove the defogger relay from the luggage room junction block assembly.





(b) Disconnect the g1 back window glass 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. CHECK HARNESS AND CONNECTOR (BACK WINDOW GLASS - BODY GROUND)

(a) Disconnect the g2 back window glass 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 HARNESS OR CONNECTOR

OK -- REPLACE BACK WINDOW GLASS Removal

12. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Replace the air conditioning amplifier assembly Removal.

(b) Check the window defogger operation.

Result:





C -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal

B -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

A -- END (AIR CONDITIONING AMPLIFIER ASSEMBLY WAS DEFECTIVE)