Inspection Procedure

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 

1. Select the Active Test using the intelligent tester or Techstream to generate a control command, and then check that the windshield deicer 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.
   1. Intelligent tester

      BODY NO.5: 

      ACTIVE TEST - BODY NO.5
      
      

      Tester Display	Test Part	Control Range
      WIPER DEICER	Deicer relay operation	OFF or ON

   2. Techstream

   Body No.5: 

   ACTIVE TEST - BODY NO.5
   
   

   Tester Display	Test Part	Control Range
   Wiper Deicer	Deicer relay operation	OFF or ON

OK: Windshield deicer operates normally. 

Result 

B:  Go to step  4

C:  Go to step  5

A: Go to Next Step 

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) 

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) 

1. Remove the DEICER fuse from the engine room No. 2 relay block.
2. Measure the resistance according to the value (s) in the table below.

Standard resistance 

NG: REPLACE FUSE 

OK: Go to Next Step 

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

Standard resistance 

Fig 1: Inspecting Deicer Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DEICER RELAY 

OK: Go to Next Step 

1. Remove the deicer relay from the No. 3 relay block
2. Disconnect the A51 front controller connector.
3. Measure the voltage according to the value (s) in the table below

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

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

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

Standard resistance 

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Remove the deicer relay from the No 3 relay block.
2. Disconnect the A30 windshield deicer wire connector.
3. Measure the resistance according to the value (s) in the table below

Standard resistance 

Fig 3: Identifying A30 Windshield Deicer Wire Connector And No 3 Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the A30 windshield deicer wire connector
2. Measure the resistance according to the value (s) in the table below

Standard resistance 

Fig 4: Identifying A30 Windshield Deicer Wire Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Temporarily replace the front controller with a new or normally functioning one
2. Check that the malfunction disappears

OK: Malfunction disappears. 

NG: REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL )

OK: END (FRONT CONTROLLER IS DEFECTIVE)