Inspection Procedure

CHECK FOR DTCs

Result

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

Result

RESULT REFERENCE CHART

Result	Proceed to
Not output DTC codes	A
Output DTC codes (LIN communication)	B

B: GO TO MULTIPLEX COMMUNICATION SYSTEM

A: Go to Next Step

PERFORM ACTIVE TEST BY TECHSTREAM

Select the ACTIVE TEST, use the Techstream to issue a control command, and then check the window defogger operation.

Air Conditioner

AIR CONDITIONER REFERENCE CHART

Test Display	Test Part	Control Range
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 ignition switch on (IG), press the defogger switch, and check that the window defogger operates.
OK: System operates normally

NG: REPLACE A/C AMPLIFIER ASSEMBLY

OK: END

PERFORM ACTIVE TEST BY TECHSTREAM

Select the ACTIVE TEST, use the 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 REFERENCE 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 DEFOGGER RELAY .

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.

Fig 1: Checking Wire Harness ( RR DEF Relay - Battery Positive)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

WIRE HARNESS (RR DEF RELAY - BATTERY POSITIVE)

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

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.

Fig 2: Checking Wire Harness (RR DEF Relay - A/C Amplifier Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

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

Tester Connection	Condition	Specified Condition
2 - E38-38	Always	Below 1 Ω
2 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE A/C AMPLIFIER ASSEMBLY

INSPECT RR DEF RELAY
See DEFOGGER RELAY .

NG: REPLACE RR DEF RELAY

OK: GO TO NEXT STEP

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

Disconnect the RR DEF relay.

Fig 3: Checking Wire Harness (RR DEF Relay - Battery Positive And Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the voltage and resistance according to the value(s) in the table below.

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

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

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

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

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

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.

Fig 4: Identifying N18 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value(s) in the table below.

Standard resistance

NOISE FILTER

Tester Connection	Condition	Specified Condition
N18-1-N18-2	Always	Below 1 Ω
N18-1 - Body ground	Always	10 kΩ or higher

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.

Fig 5: Identifying Engine Room R/B, J/B Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value(s) in the table below.

Standard resistance

WIRE HARNESS (RR DEF RELAY - NOISE FILTER)

Tester Connection	Condition	Specified Condition
3 - N18-2	Always	Below 1 Ω
3 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (NOISE FILTER - DEFOGGER WIRE CONNECTOR)

Fig 6: Identifying Defogger Wire Connector

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

Standard resistance

WIRE HARNESS (NOISE FILTER - DEFOGGER WIRE CONNECTOR)

Tester Connection	Condition	Specified Condition
N18-1-N19-1	Always	Below 1 Ω
N18-1 - Body ground	Always	10 kΩ or higher

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.

Fig 7: Identifying P1 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

WIRE HARNESS (DEFOGGER WIRE CONNECTOR -BODY GROUND)

Tester Connection	Condition	Specified Condition
P1-1 - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE