Inspection Procedure

CHECK POWER SWITCH (SWITCH CONDITION)
1. Ensure the key is inside the cabin
2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed.
OK: OFF → ON (ACC) → ON (IG) → OFF

NG: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (POWER SOURCE MODE DOES NOT CHANGE) (See POWER SOURCE MODE DOES NOT CHANGE )

OK: Go to Next Step

PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (DEFOGGER RELAY)

Select the Active Test using the intelligent tester or Techstream to generate a control command, and then check that the rear window defogger operates

NOTE: When the BODY NO.5 (front controller) related vehicle switch is ON, ACTIVE TEST items related to the vehicle switch are prohibited (double operation prohibition). Check that the vehicle switches are OFF before performing ACTIVE TEST.

Intelligent tester

BODY NO.5:

ACTIVE TEST - BODY NO.5

Tester Display	Test Part	Control Range
RR DEF	Rear window defogger relay operation	OFF or ON

Techstream

Body No.5:

ACTIVE TEST - BODY NO.5

Tester Display	Test Part	Control Range
Rear Defogger operation	Rear window defogger relay operation	OFF or ON

OK: Rear window defogger operates normally.

Result

RESULT REFERENCE

Result	Proceed to
OK (for Display and Navigation Assembly)	A
OK (for Multi-display)	B
NG	C

B: Go to step 4

C: Go to step 5

A: Go to Next Step

CHECK DISPLAY AND NAVIGATION ASSEMBLY (OPERATION)
1. Temporarily replace the display and navigation assembly with a new or normally functioning one (see REMOVAL ).
2. Check that the malfunction disappears.
OK: Malfunction disappears.

NG: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

OK: END (DISPLAY AND NAVIGATION ASSEMBLY IS DEFECTIVE)
CHECK MULTI-DISPLAY (OPERATION)
1. Temporarily replace the multi-display with a new or normally functioning one, w/ navigation system (for DVD) (see REMOVAL ) or w/o navigation system (see REMOVAL )
2. Check that the malfunction disappears
OK: Malfunction disappears.

NG: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

OK: END (MULTI-DISPLAY IS DEFECTIVE)

INSPECT FUSE (DEFOG, D-IG1-3)

Remove the DEFOG H-fuse from the engine room No. 1 relay block.
Remove the D-IG1 -3 fuse from the driver side junction block.
Measure the resistance according to the value (s) in the table below.

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
DEFOG H-fuse	Always	Below 1 Ω
D-IG1-3 fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: Go to Next Step

INSPECT DEFOGGER RELAY (DEFOG)

Remove the defogger relay from the No. 3 relay block.
Measure the resistance according to the value (s) in the table below.

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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

Fig 1: Inspecting Defogger Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DEFOGGER RELAY

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - FRONT CONTROLLER AND BATTERY)

Remove the defogger relay from the No. 3 relay block
Disconnect the A51 front controller connector

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
Defogger relay terminal 2 - Body ground	Power switch ON (IG)	11 to 14 V
Defogger relay terminal 5 - Body ground	Always	11 to 14 V

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
Defogger relay terminal 1-A51-12 (R DEF)	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying A51 Front Controller Connector And No.3 Relay Box Defogger Relay

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY AND BODY GROUND)

Disconnect the S19 and W1 defogger connectors.
Remove the defogger relay from the No. 3 relay block

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
S19-1 - Defogger relay terminal 3	Always	Below 1 Ω
W1-1 -Body ground
Defogger relay terminal 4 - Body ground
S19-1 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying S19 And W1 Defogger Connectors With No.3 Relay Box Defogger Relay

OK: Go to Next Step

CHECK FRONT CONTROLLER (OPERATION)
1. Temporarily replace the front controller with a new or normally functioning one.
2. Check that the malfunction disappears
OK: Malfunction disappears.

NG: Go to step 10

OK: END (FRONT CONTROLLER IS DEFECTIVE)
CHECK AIR CONDITIONING AMPLIFIER (OPERATION)
1. Temporarily replace the air conditioning amplifier with a new or normally functioning one (see REMOVAL )
2. Check that the malfunction disappears.
  OK: Malfunction disappears.
  
  NG: REPAIR REAR WINDOW DEFOGGER WIRE (see REPAIR )
  
  OK: END (AIR CONDITIONING AMPLIFIER IS DEFECTIVE)