RM36D0EC _59 Vehicle Exterior _083107 WINDOW / GLASS _0400968 WINDOW DEFOGGER SYSTEM J

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


DESCRIPTION

An operation request signal is sent to the air conditioning amplifier assembly via LIN communication when the window defogger switch (air conditioning control assembly) is operated. When the air conditioning amplifier assembly receives the signal, it sends an operation request signal via CAN communication to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives the signal, it sends an operation request signal via CPXI communication to the power distribution box assembly. After the operation request signal is received by the power distribution box assembly, it outputs an operation signal and operates the window defogger.

WIRING DIAGRAM

E447874E05
3.094,0.417 3.708,0.615 0.615,0.198 10 false LIN1 5.938,0.406 6.552,0.604 0.615,0.198 10 false LIN1 1.677,0.854 3.792,1.219 2.115,0.365 10 false Air Conditioning Control Assembly (Window Defogger Switch) 5.969,3.271 6.844,3.656 0.875,0.385 10 false from Auxiliary Battery 1.177,4.063 1.604,4.25 0.427,0.188 10 false CXP1 3.844,3.271 4.156,3.469 0.313,0.198 10 false 6J 3.875,3.063 4.031,3.26 0.156,0.198 10 false 1 5.01,6.917 6.552,7.344 1.542,0.427 10 false Radio Setting Condenser (Noise Filter) 5.01,6.74 5.323,6.938 0.313,0.198 10 false N2 5.292,6.24 5.906,6.438 0.615,0.198 10 false DEF+ 5.073,6.24 5.229,6.438 0.156,0.198 10 false 1 0.51,7.813 2.156,8 1.646,0.188 10 false : LIN Communication Line 1.635,7.385 3.719,7.635 2.083,0.25 10 false Back Door Glass (Defogger Wire) 1.573,6.885 2.031,7.083 0.458,0.198 10 false R22 3.531,6.885 3.99,7.083 0.458,0.198 10 false R2 1.646,6.667 1.802,6.865 0.156,0.198 10 false 1 3.573,6.667 3.729,6.865 0.156,0.198 10 false 1 1.99,6.771 2.146,6.969 0.156,0.198 10 false L 3.24,6.781 3.396,6.979 0.156,0.198 10 false B 2.479,5.115 3.438,5.323 0.958,0.208 10 false RR DEF Relay 5.552,2.281 7.104,2.698 1.552,0.417 10 false Air Conditioning Amplifier Assembly 3.833,3.708 4.146,3.906 0.313,0.198 10 false 6B 3.833,4.208 4.146,4.406 0.313,0.198 10 false 6C 3.844,4.802 4.156,5 0.313,0.198 10 false 6F 3.844,3.51 4.156,3.708 0.313,0.198 10 false 44 3.844,4.01 4.156,4.208 0.313,0.198 10 false 25 3.854,4.594 4.167,4.792 0.313,0.198 10 false 43 1.635,5.552 3.771,5.792 2.135,0.24 10 false Power Distribution Box Assembly 0.51,8.167 2.271,8.375 1.76,0.208 10 false : CAN Communication Line 0.51,8.479 2.333,8.677 1.823,0.198 10 false : CXPI Communication Line 0.417,5.583 1.573,6.146 1.156,0.563 10 false Main Body ECU (Multiplex Network Body ECU) 4.396,3.458 5.552,3.698 1.156,0.24 10 false INP STD_NO.1-1

CAUTION / NOTICE / HINT

NOTICE:
·

If the window defogger system is operated when the auxiliary battery voltage is low, due to the electrical load limit control that gives voltage supply priority to the power steering system, the window defogger system may not operate. In this case, check the vehicle control history of the power steering system and check that "Battery Voltage Drop: X208F" is not stored before proceeding with troubleshooting.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>VEHICLE CONTROL HISTORY

·

With the negative (-) auxiliary battery terminal connected, disconnect/do not connect the connector of the power distribution box assembly.

·

When replacing the power distribution box assembly, the system may not operate normally if the same part number is not used.

·

The window defogger system uses the CAN communication system, LIN communication system and CXPI communication system. Inspect the communication function by following How to Proceed with Troubleshooting.

Click hereVehicle Exterior>WINDOW / GLASS>WINDOW DEFOGGER SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING



HINT:

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


PROCEDURE

1.READ VALUE USING GTS (REAR DEFOGGER INPUT SIGNAL)
a.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Defogger Input Signal Window defogger switch signal input condition OFF/ON OFF: Window defogger switch off
ON: Window defogger switch on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Defogger Input Signal
50003 475 1280
OK:

On the GTS screen, ON or OFF is displayed accordingly.



Result:
Proceed to
OK
NG



OK

2.READ VALUE USING GTS (REAR DEFOGGER OUTPUT SIGNAL)

NG

6.CHECK AIR CONDITIONING SYSTEM
2.READ VALUE USING GTS (REAR DEFOGGER OUTPUT SIGNAL)
a.

Read the Data List according to the display on the GTS.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Defogger Output Signal Window defogger output condition OFF/ON OFF: Window defogger does not operate
ON: Window defogger operates 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Defogger Output Signal
50003 475 1281
OK:

On the GTS screen, ON or OFF is displayed accordingly.



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BATTERY AND BODY GROUND)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BATTERY AND BODY GROUND)
E444470C11
0.531,0.292 0.906,0.552 0.375,0.26 2.635,0.292 3.01,0.552 0.375,0.26 5.49,0.292 5.865,0.552 0.375,0.26 0.115,0.073 0.427,0.271 0.313,0.198 10 false *a 0.646,0.333 0.958,0.531 0.313,0.198 10 false 6J 2.74,0.333 3.052,0.531 0.313,0.198 10 false 6B 5.594,0.333 5.906,0.531 0.313,0.198 10 false 6C
*a Front view of wire harness connector
(to Power Distribution Box Assembly) 		- -


a.

Disconnect the power distribution box assembly connectors.


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
6J-1 - Body ground Ignition switch off 11 to 14 V



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6B-44 - Body ground Always Below 1 Ω
6C-25 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BACK DOOR GLASS [DEFOGGER WIRE])

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BACK DOOR GLASS [DEFOGGER WIRE])
a.

Disconnect the 6F power distribution box assembly connector.


b.

Disconnect the N2 radio setting condenser (noise filter) connector.


c.

Disconnect the R2 back door glass (defogger wire) connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6F-43 - R2-1 (B) Always Below 1 Ω
6F-43 or R2-1 (B) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS [DEFOGGER WIRE] - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS [DEFOGGER WIRE] - BODY GROUND)
a.
E403076C04
1.458,0.188 1.844,0.427 0.385,0.24 1.479,1.448 0.865,0.854 0.865,0.854 0.594,0.854 true 0.104,0.104 0.417,0.302 0.313,0.198 10 false *a 1.531,0.219 1.844,0.417 0.313,0.198 10 false R22 0.438,0.771 0.594,0.969 0.156,0.198 10 false L
*a Front view of wire harness connector
(to Back Door Glass [Defogger Wire])


Disconnect the back door glass (defogger wire) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
R22-1 (L) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE BACK DOOR GLASS (DEFOGGER WIRE)

Click hereVehicle Exterior>WINDOW / GLASS>BACK DOOR GLASS>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK AIR CONDITIONING SYSTEM
a.

Check the air conditioning system.

for HV Model:

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model:

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>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.


OK:

The air conditioning system operates normally.



Result:
Proceed to
OK
NG



OK

7.CHECK AIR CONDITIONING CONTROL ASSEMBLY

NG

GO TO AIR CONDITIONING SYSTEM

for HV Model:

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model:

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING


7.CHECK AIR CONDITIONING CONTROL ASSEMBLY
a.

Check that the indicator illuminates when the defogger switch is on.

OK:

Defogger indicator illuminates.



Result:
Proceed to
OK
NG



OK

8.PERFORM ACTIVE TEST USING GTS (REAR DEFOGGER RELAY)

NG

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

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


8.PERFORM ACTIVE TEST USING GTS (REAR DEFOGGER RELAY)
a.

Using the GTS, perform the Active Test.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Rear Defogger Relay RR DEF relay OFF or ON -
Body Electrical > Air Conditioner > Active Test
Tester Display
Rear Defogger Relay
50004 450 7
OK:

Back door glass (defogger wire) warms up.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

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


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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