Inspection Procedure

CHECK FOR DTCs

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.

PERFORM ACTIVE TEST BY TECHSTREAM

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.

REPLACE AIR CONDITIONER CONTROL ASSEMBLY
1. Replace the air conditioner control assembly.
CONFIRM REAR WINDOW DEFOGGER OPERATION
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

PERFORM ACTIVE TEST BY TECHSTREAM

Select the Active Test, use Techstream to issue a control command, and then check the DEFOG relay operation.

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.

INSPECT RR DEF RELAY
See ON-VEHICLE INSPECTION .

NG: REPLACE RR DEF RELAY

OK: Go to next step.

CHECK WIRE HARNESS (RR DEF RELAY - BATTERY POSITIVE)

Disconnect the RR DEF relay.

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.

CHECK WIRE HARNESS (RR DEF RELAY - A/C AMPLIFIER ASSEMBLY)

Disconnect the RR DEF relay and A/C amplifier assembly connector.

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

INSPECT RR DEF RELAY
See ON-VEHICLE INSPECTION .

NG: REPLACE RR DEF RELAY

OK: Go to next step.

CHECK WIRE HARNESS (RR DEF RELAY - BATTERY POSITIVE AND BODY GROUND)

Fig 3: Identifying RR DEF Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the RR DEF relay.

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.

INSPECT NOISE FILTER

Disconnect the noise filter connector.

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.

CHECK WIRE HARNESS (RR DEF RELAY - NOISE FILTER)

Disconnect the RR DEF relay and defogger wire connectors.

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)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK WIRE HARNESS (NOISE FILTER - DEFOGGER WIRE CONNECTOR)

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)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK WIRE HARNESS (DEFOGGER WIRE CONNECTOR - BODY GROUND)

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE