RM3090E _59 Vehicle Exterior _008792 WINDOW / GLASS _0050343 WINDOW DEFOGGER SYSTEM J

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


DESCRIPTION

When the rear defogger switch on the air conditioning control assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly via LIN communication. When the air conditioning amplifier assembly receives the signal, it turns on the DEF relay to operate the window defogger system.

WIRING DIAGRAM

E274386E01
0.271,0.073 1.115,0.396 0.844,0.323 10 false from Battery 0.271,0.896 1.115,1.219 0.844,0.323 10 false from Battery 0.198,1.99 1.125,2.49 0.927,0.5 10 false from IG1 NO.2 Relay 1.802,0.25 2.125,0.51 0.323,0.26 10 false DEF 1.823,1.063 2.146,1.323 0.323,0.26 10 false DEF 2.573,0.135 2.896,0.396 0.323,0.26 10 false *1 2.26,0.781 2.583,1.042 0.323,0.26 10 false *2 1.542,2.167 2.438,2.688 0.896,0.521 10 false ECU-IG NO.3 3.073,2.417 3.396,2.677 0.323,0.26 10 false DEF 2.604,0.781 2.927,1.042 0.323,0.26 10 false 3 3.656,0.771 3.979,1.031 0.323,0.26 10 false 5 2.594,1.823 2.917,2.083 0.323,0.26 10 false 1 3.656,1.823 3.979,2.083 0.323,0.26 10 false 2 2.229,3.021 4.281,3.531 2.052,0.51 10 false No. 2 Engine Room Relay Block, Junction Block Assembly 4.615,1.25 4.938,1.51 0.323,0.26 10 false G 4.625,1.052 4.948,1.313 0.323,0.26 10 false 1 5.948,1.26 6.271,1.521 0.323,0.26 10 false U2 5.969,1.042 6.292,1.302 0.323,0.26 10 false 1 5.625,1.146 5.948,1.406 0.323,0.26 10 false B 6.052,1.979 6.448,2.198 0.396,0.219 10 false DEF+ 6.5,1.948 6.823,2.208 0.323,0.26 10 false 1 4.5,1.594 6.615,1.823 2.115,0.229 10 false Back Door Glass (Defogger Wire) 5.208,2.385 6.781,2.688 1.573,0.302 10 false Radio Setting Condenser 5.198,2.219 5.521,2.479 0.323,0.26 10 false N18 5.563,2.854 6,3.125 0.438,0.271 10 false RDFG 5.25,2.719 5.688,2.99 0.438,0.271 10 false 38 5.563,4.219 6,4.49 0.438,0.271 10 false LIN1 6.073,3.99 6.51,4.26 0.438,0.271 10 false GND 6.469,3.854 6.906,4.125 0.438,0.271 10 false 14 5.438,4.802 5.844,5 0.406,0.198 10 false G81 2.802,4.229 3.24,4.5 0.438,0.271 10 false LIN1 5.458,5 6.677,5.5 1.219,0.5 10 false Air Conditioning Amplifier Assembly 1.885,4.677 2.219,4.885 0.333,0.208 10 false G20 1.906,4.865 3.354,5.302 1.448,0.438 10 false Air Conditioning Control Assembly 0.188,4.865 1.698,5.115 1.51,0.25 10 false *1: w/ Side Marker Light 0.188,5.177 1.823,5.458 1.635,0.281 10 false *2: w/o Side Marker Light 1.042,5.521 2.802,5.771 1.76,0.25 10 false : LIN Communication Line

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

If the battery voltage becomes low, window defogger system operation is canceled to prioritize supplying power to the power steering system.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DATA LIST / ACTIVE TEST



PROCEDURE

1.CHECK AIR CONDITIONING SYSTEM
a.

Check the air conditioning system.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)>HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

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



Result:
Proceed to
The air conditioning system operates normally
The air conditioning system does not operate normally



The air conditioning system operates normally

2.PERFORM ACTIVE TEST USING GTS

The air conditioning system does not operate normally

GO TO AIR CONDITIONING SYSTEM

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)>HOW TO PROCEED WITH TROUBLESHOOTING


2.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

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


e.

Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Defogger Relay (Rear) DEF relay OFF or ON -
Body Electrical > Air Conditioner > Active Test
Tester Display
Defogger Relay (Rear)
50004 121 22

Result:
Proceed to
The window defogger system operates normally
The window defogger system does not operate normally



The window defogger system operates normally

3.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

The window defogger system does not operate normally

4.INSPECT DEF RELAY
3.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
a.

Replace the air conditioning amplifier assembly with a new or known good one.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


b.

Check that the window defogger system operates normally.


Result:
Proceed to
The window defogger system operates normally
The window defogger system does not operate normally



The window defogger system operates normally

END (AIR CONDITIONING AMPLIFIER ASSEMBLY WAS DEFECTIVE)

The window defogger system does not operate normally

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PANEL(for Automatic Air Conditioning System)>REMOVAL


4.INSPECT DEF RELAY
a.

Remove the DEF relay from the No. 2 engine room relay block, junction block assembly.

Click hereVehicle Exterior>WINDOW / GLASS>RELAY(for Window Defogger)>ON-VEHICLE INSPECTION


b.

Inspect the DEF relay.

Click hereVehicle Exterior>WINDOW / GLASS>RELAY(for Window Defogger)>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (DEF RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BATTERY)

NG

REPLACE DEF RELAY

5.CHECK HARNESS AND CONNECTOR (DEF RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BATTERY)
a.

Remove the DEF relay from the No. 2 engine room relay block, junction block assembly.

Click hereVehicle Exterior>WINDOW / GLASS>RELAY(for Window Defogger)>ON-VEHICLE INSPECTION


b.

Disconnect the G81 air conditioning amplifier assembly connector.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
DEF relay holder terminal-1 - Body ground Ignition switch ON 11 to 14 V
DEF relay holder terminal-1 - Body ground Ignition switch off Below 1 V
DEF relay holder terminal-3 - Body ground Always 11 to 14 V



d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
DEF relay holder terminal-2 - G81-38 (RDFG) Always Below 1 Ω
DEF relay holder terminal-2 - Body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

6.CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS - DEF RELAY AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS - DEF RELAY AND BODY GROUND)
a.

Disconnect the U2 and G back door glass connectors.


b.

Remove the DEF relay from the No. 2 engine room relay block, junction block assembly.

Click hereVehicle Exterior>WINDOW / GLASS>RELAY(for Window Defogger)>ON-VEHICLE INSPECTION


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U2-1 (B) - DEF relay holder terminal-5 Always Below 1 Ω
G-1 - Body ground Always Below 1 Ω
U2-1 (B) - Body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

7.CHECK BACK DOOR GLASS (DEFOGGER WIRE)

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>WINDOW / GLASS>WINDOW DEFOGGER SYSTEM>PROBLEM SYMPTOMS TABLE


7.CHECK BACK DOOR GLASS (DEFOGGER WIRE)
a.

Perform the on-vehicle inspection, check that the window defogger system operates normally.

Click hereVehicle Exterior>WINDOW / GLASS>WINDOW DEFOGGER WIRE>ON-VEHICLE INSPECTION

Result:
Proceed to
The window defogger system operates normally
The window defogger system does not operate normally




The window defogger system operates normally

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


The window defogger system does not operate normally

REPAIR BACK DOOR GLASS (DEFOGGER WIRE)

Click hereVehicle Exterior>WINDOW / GLASS>WINDOW DEFOGGER WIRE>REPAIR