Inspection Procedure

INSPECT COMMUNICATION LINE
1. Use the intelligent tester to check for normal function of the multiplex communication system.
  1. (ECU unconnected, communication line malfunctioning) When DTC B1214, B1215 or B1262 does not output, proceed to A.
  2. (ECU unconnected, communication line malfunctioning) When DTC B1214, B1215 or B1262 outputs, proceed to B.
B: GO TO MULTIPLEX COMMUNICATION SYSTEM

A: Go to next step.
INSPECT FUSE (HEATER, RR-DEF)
1. Remove the HEATER fuse from the instrument panel J/B.
2. Remove the RR-DEF fuse from the FL block.
3. Check the resistance.
  Standard resistance: Below 1 Ω
NG: REPLACE FUSE

OK: Go to next step.

PERFORM INTELLIGENT TESTER (ACTIVE TEST)

Connect the intelligent tester (with CAN VIN) to the DLC3.
Turn the ignition switch on.

Perform the ACTIVE TEST according to the display on the tester.

AIR CONDITIONER:

ACTIVE TEST - AIR CONDITIONER

Item	Test Details	Diagnostic Note
DEFOGGER RLY-R	Operate rear window defogger OFF/ON	-

NG: Go to step 5

OK: Go to next step.

CHECK OPERATION (AIR CONDITIONING SYSTEM)
NG: GO TO AIR CONDITIONING SYSTEM

OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT JUNCTION BLOCK (BATTERY POSITIVE AND BODY GROUND)

Check the voltage of the terminal of the J/B.

Fig 1: Identifying Junction Block Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Switch Position	Specified Condition
2B-9 - Body Ground	Ignition switch ON	10 to 14 V
2B-9 - Body Ground	Ignition switch OFF	Below 1 V
2B-8 - Body Ground	Always	10 to 14 V

NG: REPAIR OR REPLACE FUSE, HARNESS AND CONNECTOR (HEATER, RR DEF FUSE)

OK: Go to next step.

INSPECT JUNCTION BLOCK (RR-DEF RELAY)

Remove the junction block No. 2.
Connect the battery positive (+) lead to terminal 2B-8 and battery negative (-) terminal lead to terminal 2B-9, 2B-7 and 2H-11.

Check the voltage of the RR-DEF relay terminals.

Fig 2: Identifying Junction Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
2B-7 - 2B-8	Always	Below 1 V

Connect another battery positive (+) lead to the terminal 2B-9.

Check the voltage of the RR-DEF relay terminals.

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
2B-7 - 2B-8	Always	10 to 14 V

NG: REPLACE JUNCTION BLOCK

OK: Go to next step.

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

Disconnect the A8 connector.

Fig 3: Identifying A8 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Tester connection	Condition	Specified condition
A8-19 (RDFG) - Body ground	Ignition switch: ON	10 to 14 V
A8-19 (RDFG) - Body ground	Ignition switch: OFF	Below 1 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

Connect the A8 connector.

Fig 4: Identifying A8 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the intelligent tester to the DLC3.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Tester connection	Intelligent tester condition	Specified condition
A8-19 (RDFG) - Body ground	ACTIVE TEST: ON (*1)	10 to 14 V
A8-19 (RDFG) - Body ground	ACTIVE TEST: OFF (*1)	Below 1 V
HINT: *1: Perform the ACTIVE TEST according to the display on the tester.

AIR CONDITIONER:

AIR CONDITIONER

Item	Test Details	Diagnostic Note
DEFOGGER RLY-R	Operate rear window defogger OFF/ON	-

NG: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

OK: Go to next step.

INSPECT REAR WINDOW DEFOGGER WIRE

NOTE:

When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires.
Do not use detergents or glass cleaners that have abrasive ingredients.
When measuring voltage, wrap a piece of tin foil around the tip of the negative tester probe and press the foil against the wire with your finger.

Fig 5: Wrapping Piece Of Tin Foil Around Tip Of Negative Tester Probe
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the ignition switch on.

Fig 6: Measuring Voltage At Center Of Each Defogger Wire

Turn the defogger switch ON.

Check the voltage at the center of each defogger wire.

Fig 7: Checking Voltage At Center Of Each Defogger Wire

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Voltage	Criteria
Approx. 5 V	Wire is not broken
Approx. 10 or 0 V	Wire is broken

HINT:

If there is approximately 10 V, the wire may be broken between the center of the wire and the wire end on the battery side. If there is no voltage, the wire may be broken between the center of the wire and the end on the ground side.

Place the voltmeter positive (+) lead against the defogger wire on the battery side.
Place the voltmeter negative (-) lead with the foil strip against the wire on the ground side.
Slide the positive (+) lead from the battery side to the ground side.
The point where the voltage drops from approximately 10 V to 0 V is where the defogger wire is broken.
HINT:

If the defogger wire is not broken, the voltmeter indicates 0 V at the positive (+) end of the defogger wire but gradually increases to approximately 12 V as the meter probe moves to the other end.

NG: REPAIR REAR WINDOW DEFOGGER WIRE

OK: Go to next step.

CHECK WIRE HARNESS (REAR WINDOW DEFOGGER - JUNCTION BLOCK NO. 2)

Disconnect the N4, N5 defogger and 2B J/B connectors.

Check the resistance of the wire harness side connectors.

Standard resistance

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Specified Condition
N4-1 - 2B-7	Below 1 Ω
N4-1 - Body ground	10 kΩ or higher
N5-1 - Body ground	Below 1 Ω

Fig 8: Checking Wire Harness (Rear Window Defogger - Junction Block No. 2)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE NOISE FILTER