Rear Window Defogger System does not Operate [08/2013 - ]: Procedure

• *1: w/o Multi-display
• *2: w/ Multi-display

1. Check if the LIN communication system*1 or CAN communication system*2 is functioning normally.
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   LIN DTC is output*1	B
   CAN DTC is output*2	C

B → See step   16 

C → See step   17 

A: Go to next step 

1. Select the Active Test using the Techstream to generate a control command, and then check that the rear window defogger operates.
   AIR CONDITIONER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Defogger Relay (Rear)	Rear window defogger relay operation	OFF or ON	-

   OK

   On Techstream screen, item changes between ON and OFF according to above chart.

   RESULT
   
   

   Result	Proceed to
   OK (w/o Multi-display)	A
   OK (w/ Multi-display)	B
   NG	C

B → See step   5 

C → See step   10 

A: Go to next step 

1. Temporarily replace the air conditioning control assembly with a new or normally functioning one. Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Turn the engine switch on (IG).
2. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.
3. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

   OK

   Rear window defogger system functioning normally.

NG → See step   14 

OK → END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE) 

1. Check if the navigation system function properly. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] .

   OK

   Navigation system function properly.

NG → See step   18 

OK: Go to next step 

1. Temporarily replace the air conditioning amplifier assembly with a new or normally functioning one. Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Turn the engine switch on (IG).
2. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.
3. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

   OK

   Rear window defogger system functioning normally.

NG → See step   8 

OK → END (AIR CONDITIONING AMPLIFIER ASSEMBLY IS DEFECTIVE) 

1. Temporarily replace the multi-media module receiver assembly with a new or normally functioning one. Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Turn the engine switch on (IG).
2. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.
3. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

   OK

   Rear window defogger system functioning normally.

NG → See step   19 

OK → END (MULTI-MEDIA MODULE RECEIVER ASSEMBLY IS DEFECTIVE) 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the defogger relay from the engine room junction block.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 4	Battery voltage is not applied to terminals 1 and 2	Below 1 Ω
   3 - 5		10 kΩ or higher
   3 - 4	Battery voltage is applied to terminals 1 and 2	10 kΩ or higher
   3 - 5		Below 1 Ω

NG → REPLACE DEFOGGER RELAY 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the defogger relay from the engine room relay block.
2. Disconnect the E36 air conditioning amplifier assembly connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Defogger relay terminal 1 - Body ground	Engine switch on (IG)	11 to 14 V
   Defogger relay terminal 5 - Body ground	Always	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Defogger relay terminal 2 - E36-24 (RDEF)	Always	Below 1 Ω
   Defogger relay terminal 2 - Body ground	Always	10 kΩ higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S19 and S20 defogger wire connectors.
2. Remove the defogger relay from the engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   S19-1 (B) - Defogger relay terminal 3	Always	Below 1 Ω
   S20-1 (E) - Body ground
   Defogger relay terminal 4 - Body ground
   S19-1 (B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S19 and S20 defogger wire connectors.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   S19-1 (B) - S20-1 (E)	Engine switch on (IG) and defogger switch on	11 to 14 V

NG → See step   14 

OK → See step   15