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 integration control and 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 rear window defogger.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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 the same communication line.
OK:
The air conditioning system operates normally.
NG -- GO TO AIR CONDITIONING SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (DEFOGGER RELAY)
(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 rear window defogger system operates normally.
NG -- CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY AND BODY GROUND)
OK -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal
3. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY AND BODY GROUND)
(a) Disconnect the 1G and 1H integration relay connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - INTEGRATION RELAY)
(a) Disconnect the F47 air conditioning amplifier assembly connector.
(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 INTEGRATION RELAY
(a) Reconnect the 1G and 1H integration relay connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPLACE INTEGRATION RELAY Removal
OK -- Continue to next step.
6. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Reconnect the F47 air conditioning amplifier assembly connector.
(b) 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 (INTEGRATION RELAY - RADIO SETTING CONDENSER)
(a) Disconnect the L21 radio setting condenser connector.
(b) Disconnect the 1I integration relay connector.
(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.
8. CHECK INTEGRATION RELAY
(a) Reconnect the 1I integration relay connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPLACE INTEGRATION RELAY
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER - REAR WINDOW DEFOGGER WIRE)
(a) Disconnect the L22 rear window defogger wire (back door glass) battery side connector.
(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.
10. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BODY GROUND)
(a) Disconnect the R1 rear window defogger wire (back window glass) ground side connector.
(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.
11. REPLACE RADIO SETTING CONDENSER
(a) Replace the radio setting condenser.
NEXT -- Continue to next step.
12. CHECK WINDOW DEFOGGER SYSTEM
(a) Check the operation of the window defogger system.
OK:
The rear window defogger system operates normally.
NG -- REPLACE REAR WINDOW DEFOGGER WIRE (BACK WINDOW GLASS) Removal
OK -- END (RADIO SETTING CONDENSER WAS DEFECTIVE)
13. REPLACE INTEGRATION RELAY
(a) Replace the integration relay Removal.
NEXT -- Continue to next step.
14. CHECK WINDOW DEFOGGER SYSTEM
(a) Check the operation of the window defogger system.
OK:
The rear window defogger system operates normally.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE)
OK -- END (INTEGRATION RELAY WAS DEFECTIVE)