Inspection Procedure

1. Check for DTC.

   Result 

   DTC RESULT REFERENCE
   
   

   Result	Proceed To
   DTC is not output	A
   LIN DTC is output	B
   CAN DTC is output	C

B: GO TO LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

C: GO TO CAN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

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 

   AIR CONDITIONER SPECIFICATION
   
   

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

   Result 

   DTC RESULT REFERENCE
   
   

   Result	Proceed To
   Rear window defogger operates normally (w/o Multi-display)	A
   Rear window defogger operates normally (w/Multi-display)	B
   Rear window defogger does not operate	C

B:  Go to step  5

C:  Go to step  7

A: Go to Next Step 

1. Temporarily replace the air conditioning control assembly with a new or normally functioning one (See REMOVAL ).

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: REPLACE AIR CONDITIONING AMPLIFIER (Seepage AC-341) 

OK: END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE) 

1. Temporarily replace the multi-display with a new or normally functioning one (See REMOVAL ).

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: REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL )

OK: END (MULTI-DISPLAY IS DEFECTIVE) 

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

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   DEFOG fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: Go to Next Step 

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 

   RESISTANCE REFERENCE
   
   

   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

   Fig 1: Identifying Defogger Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DEFOGGER RELAY 

OK: Go to Next Step 

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

   Standard Voltage 

   VOLTAGE CHART
   
   

   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 

   RESISTANCE REFERENCE
   
   

   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 

Fig 2: Identifying E36 Air Conditioning Amplifier Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the S17 and S18 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 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   S17-1 (B) - Defogger relay terminal 3	Always	Below 1 Ω
   S18-1 (E) - Body ground
   Defogger relay terminal 4 - Body ground
   S17-1 (B) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying S17 & S18 Defogger Wire Connectors Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the S17 and S18 defogger wire connectors.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   VOLTAGE CHART
   
   

   Tester Connection	Condition	Specified Condition
   S17-1 (B) - S18-1 (E)	Engine switch on (IG) and defogger switch on	11 to 14 V

NG: REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL )

Fig 4: Identifying S17 & S18 Defogger Wire Connectors Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE BACK WINDOW GLASS  (See REMOVAL  )