Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
5. Check the value(s) by referring to the table below, and then check the window defogger operation (See ON-VEHICLE INSPECTION  ).

   Air Conditioner 

   ACTIVE TEST
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Defogger Rly-R	Turns rear window defogger	OFF/ON	-

   OK: Rear window defogger normally operates. 

NG: Go to step  15

OK: Go to next step 

1. Use the Techstream to check if the multiplex communication system is functioning normally (See DIAGNOSTIC TROUBLE CODE CHART ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Multiplex communication DTC is not output (w/o navigation system)	A
   Multiplex communication DTC is output	B
   Multiplex communication DTC Is not output (w/ navigation system)	C

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

C: Go to step  10

A: Go to next step 

1. Use the Techstream to check if the audio and visual system is functioning normally (See DTC CHECK / CLEAR ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Audio and visual system DTC is output	A
   Audio and visual system DTC is not output	B

B: GO TO AUDIO AND VISUAL SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

A: Go to next step 

1. Replace the integration control and panel assembly (See REMOVAL ).

1. Turn the engine switch on (IG), press the window defogger switch, and check that window defogger operates (See ON-VEHICLE INSPECTION  ).

   OK: Rear window defogger normally operates. 

NG: Go to step 6 

OK: END 

1. Replace the radio receiver assembly (See REMOVAL ).

1. Turn the engine switch on (IG), press the window defogger switch, and check that window defogger operates (See ON-VEHICLE INSPECTION  ).

   OK: Rear window defogger normally operates. 

NG: Go to step 8 

OK: END 

1. Replace the gateway ECU (See REMOVAL ).

1. Turn the engine switch on (IG), press the window defogger switch, and check that window defogger operates (See ON-VEHICLE INSPECTION  ).

   OK: Rear window defogger normally operates. 

NG: REPLACE A/C AMPLIFIER ASSEMBLY  (See REMOVAL )

OK: END 

1. Use the Techstream to check if the navigation system is functioning normally (See DTC CHECK / CLEAR )

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Navigation system DTC is not output	A
   Navigation system DTC is output	B

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

A: Go to next step 

1. Replace the multi-display assembly (See REMOVAL ).

1. Turn the engine switch on (IG), press the window defogger switch, and check that window defogger operates (See ON-VEHICLE INSPECTION  ).

   OK: Rear window defogger normally operates. 

NG: Go to step 13 

OK: END 

1. Replace the gateway ECU (See REMOVAL ).

1. Turn the engine switch on (IG), press the window defogger switch, and check that window defogger operates (See ON-VEHICLE INSPECTION  ).

   OK: Rear window defogger normally operates. 

NG: REPLACE A/C AMPLIFIER ASSEMBLY  (See REMOVAL )

OK: END 

1. Disconnect the DEFOG relay from engine room No. 1 relay block and junction block.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   Engine room No. 1 relay block and junction block DEFOG relay terminal 1 - Body ground	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying DEFOG Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR, OR LH-IG FUSE 

OK: Go to next step 

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

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   Engine room No. 1 relay block and junction block DEFOG relay terminal 5 - Body ground	Always	11 to 14 V

Fig 2: Identifying DEFOG Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR, OR DEFOG FUSE 

OK: Go to next step 

1. Measure the resistance of the DEFOG relay.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

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

Fig 3: Identifying Defogger Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DEFOG RELAY 

OK: Go to next step 

1. Reconnect the DEFOG relay.
2. Disconnect the J58 connector from the A/C amplifier assembly
3. Measure the voltage according to the value(s) in the table below

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   J58-3 (RDFG) - Body ground	Engine switch on (IG)	11 to 14 V

Fig 4: Identifying J58 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the J58 connector to the A/C amplifier assembly
2. Measure the voltage according to the value(s) in the table below

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Switch Condition	Specified Condition
   J58-3 (RDFG) - Body ground	Push the window defogger switch on	Below 1 V

Fig 5: Identifying J58 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE A/C AMPLIFIER ASSEMBLY  (See REMOVAL )

OK: Go to next step 

1. Disconnect the DEFOG relay and defogger wire connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   Engine room No. 1 relay block and junction block DEFOG relay terminal 3 - Q21-1	Always	Below 1 Ω

Fig 6: Identifying DEFOG Relay And Defogger Wire Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the noise filter connectors
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   A-1 - B-1	Always	Below 1 Ω

Fig 7: Identifying Noise Filter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NOISE FILTER 

OK: Go to next step 

1. Disconnect the rear defogger wire connector
2. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   P19-1 - Body ground	Always	Below 1 Ω

Fig 8: Identifying Rear Defogger Wire Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR REAR WINDOW DEFOGGER WIRE  (See REPAIR  )