Inspection Procedure

1. Select the DTC check on Techstream to check for communication errors.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   No DTC is output	A
   DTC are output (LIN communication)	B

B:  GO TO DIAGNOSTIC TROUBLE CODE CHART .

A: Go to next step. 

1. Select the Active Test, use Techstream to issue a control command, and then check the window defogger operation.

   Air Conditioner: 

   DIAGNOSTIC NOTE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Defogger Relay (Rear)	Turns rear window defogger	OFF/ON	-

OK:  Go to step  5

NG: Go to next step. 

1. Replace the air conditioner control assembly.

1. Turn the engine switch on (IG), press the defogger switch, and check that the window defogger operates.

NG: REPLACE A/C AMPLIFIER ASSEMBLY 

OK: END 

1. Select the Active Test, use Techstream to issue a control command, and then check the DEFOG relay operation.
2. Check that operation sound of the RR DEF relay is heard
   RESULT CHART
   
   

   Result	Proceed to
   Relay operating sound is heard	OK
   Relay operating sound is not heard	NG

OK:  Go to step  9

NG: Go to next step. 

See ON-VEHICLE INSPECTION  .

NG: REPLACE RR DEF RELAY 

OK: Go to next step. 

1. Disconnect the RR DEF relay.
2. Measure the voltage according to the value(s) in the table below

   Standard voltage: Engine room R/B, J/B 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   1 - Body ground	Engine switch on (IG)	10 to 14 V

   Fig 1: Identifying RR DEF Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE A/C NO. 2 FUSE, HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Disconnect the RR DEF relay and A/C amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   2 - E1-38	Always	Below 1 Ω
   2 - Body ground	Always	10 kΩ or higher

   Fig 2: Checking Wire Harness (RR DEF Relay - A/C Amplifier Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE A/C AMPLIFIER ASSEMBLY 

See ON-VEHICLE INSPECTION  .

NG: REPLACE RR DEF RELAY 

OK: Go to next step. 

Fig 3: Identifying RR DEF Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the RR DEF relay.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard resistance: Engine room R/B, J/B 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

   Standard voltage: Engine room R/B, J/B 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   5 - Body ground	Always	10 to 14 V

NG: REPAIR OR REPLACE RR DEF FUSE, HARNESS OR CONNECTOR 

OK: Go to next step. 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L20-1 - L20-2	Always	Below 1 Ω
   L20-1 - Body ground	Always	10 kΩ or higher

   Fig 4: Identifying L20 Noise Filter Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NOISE FILTER 

OK: Go to next step. 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   3 - L20-2	Always	Below 1 Ω
   3 - Body ground	Always	10 kΩ or higher

   Fig 5: Checking Wire Harness (RR DEF Relay - Noise Filter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L20-1 - L25-1	Always	Below 1 Ω
   L20-1 - Body ground	Always	10 kΩ or higher

   Fig 6: Checking Wire Harness (Noise Filter - Defogger Wire Connector)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   N1-1 - Body ground	Always	Below 1 Ω

   Fig 7: Identifying N1 Defogger Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE