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Home >> Toyota >> 2009 >> Highlander Limited, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Windshield/WINDOWGLASS (Except Hybrid) >> Window Defogger System >> Rear Window Defogger System does not Operate >> Inspection Procedure

Inspection Procedure

  1. CHECK FUSES (RR DEF) 
    1. Remove the fusible link block assembly (RR DEF) from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A - B (RR DEF) Always Below 1 Ω

      NG: REPLACE FUSIBLE LINK BLOCK ASSEMBLY (RR DEF FUSE) 

      Fig 1: Identifying Fusible Link Block Assembly
      G05421227Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  2. INSPECT DEFOGGER RELAY (Marking: RR DEF) 
    1. Remove the defogger relay (Marking: RR DEF) from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying Defogger Relay Terminals
      G04952245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

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

      NG: REPLACE DEFOGGER RELAY (Marking: RR DEF) 

      OK: Go to next step 

  3. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use Techstream to issue a control command, and then check the window defogger operation.

      Air Conditioner: 

      ACTIVE TEST CHART

      Tester Display Test Part Control Range Diagnostic Note
      Defogger Relay (Rear) Rear window defogger OFF/ON -

      Result 

      RESULT CHART

      Result Proceed to
      The window defogger system does not operate normally when operating it through Techstream. A
      The window defogger system operates normally when operating it through Techstream. B

      A: Go to step  7

      B: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (LIN COMMUNICATION LINE) 
    1. Disconnect the D37 air conditioning amplifier connector.
    2. Disconnect the E10 air conditioning control connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D37-37 (LIN1) - E10-5 (LIN1) Always Below 1 Ω
      D37-37 (LIN1) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying Air Conditioning Amplifier And Control Connector Terminals
      G05421229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  5. REPLACE AIR CONDITIONING CONTROL ASSEMBLY 
    1. for Automatic Air Conditioning System
      1. Replace the air conditioning control assembly (See REMOVAL ).
    2. for Manual Air Conditioning System
      1. Replace the air conditioning control assembly (See AIR CONDITIONING PANEL (FOR MANUAL AIR CONDITIONING SYSTEM) ).
  6. CONFIRM REAR WINDOW DEFOGGER OPERATION 
    1. Turn the ignition switch on (IG), press the defogger switch, and check that the window defogger operates.

      OK: Window defogger system operates normally 

      NG: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY  (See REMOVAL )

      OK: END 

  7. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Select the ACTIVE TEST, use Techstream to issue a control command, and then check the window defogger operation.

      Air Conditioner: 

      ACTIVE TEST CHART

      Tester Display Test Part Control Range Diagnostic Note
      Defogger Relay (Rear) Rrear window defogger OFF/ON -
    2. Check that operation sound of the DEFOGGER relay (Marking: RR DEF) is heard.

      Result 

      RESULT CHART

      Result Proceed to
      Relay operating sound is heard A
      Relay operating sound is not heard B

      A: Go to step  10

      B: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - ENGINE ROOM RELAY BLOCK) 
    1. Disconnect the D37 air conditioning amplifier connector.
    2. Disconnect the defogger relay (Marking: RR DEF) engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D37-38 (RDEF) - 2 Always Below 1 Ω
      D37-38 (RDEF) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 4: Identifying Air Conditioning Amplifier And Engine Room Relay Block Connector Terminals
      G06121300Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (RDEF TERMINAL BATTERY VOLTAGE) 
    1. Reconnect the defogger relay (Marking: RR DEF) engine room relay block.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D37-38 (RDEF) - Body ground Ignition switch on (IG) 11 to 14 V

      NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See TERMINALS OF ECU  )

      Fig 5: Identifying Air Conditioning Amplifier Assembly Connector Terminal
      G06121301Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY  (See REMOVAL )

  10. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - ENGINE ROOM RELAY BLOCK) 
    1. w/ Glass Hatch Opener
      1. Disconnect the Y2 connector.
      2. Remove the defogger relay (Marking: RR DEF) from the engine room relay block.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Y2-1 - 2F-5 Always Below 1 Ω
        Y2-1 - Body ground Always 10 kΩ or higher
        Fig 6: Identifying Defogger Wire And Engine Room Relay Block Connector Terminals (W/ Glass Hatch Opener)
        G05421232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. w/o Glass Hatch Opener
      1. Disconnect the T12 connector.
      2. Remove the defogger relay (Marking: RR DEF) from the engine room relay block.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        T12-1 - 2F-5 Always Below 1 Ω
        T12-1 - Body ground Always 10 kΩ or higher

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        Fig 7: Identifying Defogger Wire And Engine Room Relay Block Connector Terminals (W/O Glass Hatch Opener)
        G05421233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE BATTERY POSITIVE) 
    1. w/ Glass Hatch Opener
      1. Reconnect the defogger relay (Marking: RR DEF) from the engine room relay block.
      2. Measure the voltage according to the value(s) in the table below.

        Standard voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Y2-1 - Body ground Ignition switch on (IG) Rear window defogger switch on 11 to 14 V
        Fig 8: Identifying Rear Window Defogger Wire Connector (W/ Glass Hatch Opener)
        G05421234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. w/o Glass Hatch Opener
      1. Reconnect the defogger relay (Marking: RR DEF) from the engine room relay block.
      2. Measure the voltage according to the value(s) in the table below.

        Standard voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        T12-1 - Body ground Ignition switch on (IG) Rear window defogger switch on 11 to 14 V

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        Fig 9: Identifying Rear Window Defogger Wire Connector (W/O Glass Hatch Opener)
        G05421235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: Go to next step 

  12. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE CONNECTOR - BODY GROUND) 
    1. w/ Glass Hatch Opener
      1. Disconnect the Y2 connector.
      2. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        Y2-1 - Body ground Always Below 1 Ω
        Fig 10: Identifying Rear Window Defogger Wire Connector (W/ Glass Hatch Opener)
        G05421234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. w/o Glass Hatch Opener
      1. Disconnect the T11 connector.
      2. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        T11-1 - Body ground Always Below 1 Ω

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        Fig 11: Identifying Rear Window Defogger Wire Connector (W/O Glass Hatch Opener)
        G05421237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE 

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