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Home >> Toyota >> 2007 >> Avalon Touring >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> Seat Blower Control Circuit >> Inspection Procedure >> Notes

Inspection Procedure: Notes

  1. INSPECT FUSE (S-HTR) 
    1. Remove the S-HTR fuse from the instrument panel J/B.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      Fig 1: Identifying S-HTR Location
      G05004814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      RESISTANCE SPECIFICATIONS

      Tester item Condition Specified condition
      S-HTR fuse Always Below 1 Ω.

    NG: REPLACE FUSE (S-HTR) 

    OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - SEAT CLIMATE CONTROL BLOWER) 
    1. Disconnect the connector from A/C amplifier.
      Fig 2: Air Conditioning Amplifier Connector Wire Harness View
      G05004815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the connector from the seat climate control blower.
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      Fig 3: Identifying Seat Climate Control Blower Connector Terminals
      G05004816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      RESISTANCE SPECIFICATIONS

      Tester connection (Symbols) Condition Specified condition
      D38-16 (LOUT) - P12-3 (BCS) Always Below 1 Ω
      D38-16 (LOUT) - P11-3 (BBS) Always Below 1 Ω
      D38-8 (ROUT) - O14-3 (BCS) Always Below 1 Ω
      D38-8 (ROUT) - O15-3 (BBS) Always Below 1 Ω
      D38-16 (LOUT) - Body ground Always 10 kΩ or higher
      D38-8 (ROUT) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE BLOWER - SEAT BACK CLIMATE BLOWER) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 4: Checking Harness And Connector (Seat Cushion Climate Blower - Seat Back Climate Blower)
      G05004817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      RESISTANCE SPECIFICATIONS

      Tester connection (Symbols) Condition Specified condition
      P11-2 (BFB+) - P12-2 (BFCL) Always Below 1 Ω
      O15-2 (BFB+) - O14-2 (BFCL) Always Below 1 Ω
      P11-2 (BFB+) - Body ground Always 10 kΩ or higher
      O15-2 (BFB+) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER - BATTERY) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard 

      Fig 5: Identifying Seat Climate Control Blower Connector Terminals
      G05004818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester connection (Symbols) Condition Specified condition
      P12-1 (BFC+) - Body ground Ignition switch off Below 1 Ω
      P12-1 (BFC+) - Body ground Ignition switch on (IG) 10 to 14 V
      O14-1 (BFC+) - Body ground Ignition switch off Below 1 Ω
      O14-1 (BFC+) - Body ground Ignition switch on (IG) 10 to 14 V

    Result 

    RESULT DESCRIPTION

    Result Proceed to
    OK A
    NG (w/o Smart key system) B
    NG (w/ Smart key system) C

    B: GO TO STARTING SYSTEM STARTING SYSTEM 

    C: GO TO PUSH BUTTON START SYSTEM SYSTEM DESCRIPTION 

    A: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Resistance 

      Fig 6: Identifying Seat Climate Control Blower Connector Terminals
      G05004819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      RESISTANCE SPECIFICATIONS

      Tester connection (Symbols) Condition Specified condition
      P11-1 (BFB-) - Body ground Always Below 1 Ω
      P12-4 (BFC-) - Body ground Always Below 1 Ω
      O14-4 (BFC-) - Body ground Always Below 1 Ω
      O15-1 (BFB-) - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  6. INSPECT AIR CONDITIONING AMPLIFIER 
    1. Remove the A/C amplifier with connectors still connected.
    2. Turn the ignition switch on (IG).
      Fig 7: Air Conditioning Amplifier Connector Wire Harness Side
      G05004820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the waveform according to the value(s).