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Home >> Toyota >> 2005 >> Avalon Touring >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Smart Key System (Keyless Entry) >> Touch Sensor Circuit >> Inspection Procedure
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Inspection Procedure

  1. READ VALUE OF HAND-HELD TESTER 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the engine switch on (IG).
    3. Following the display on the tester, select "DATA LIST".

      SMART KEY (Certification ECU): 

      SMART KEY (Certification ECU) DATA LIST

      Item Measurement Item/Range (Display) Normal Condition Diagnostic Note
      D TOUCH SENSOR Status of touch sensor front LH/ON or OFF ON: Touch sensor is touched -
      D TOUCH SENSOR Status of touch sensor front LH/ON or OFF OFF: Touch sensor is not touched -
      P TOUCH SENSOR Status of touch sensor front RH/ON or OFF ON: Touch sensor is touched -
      P TOUCH SENSOR Status of touch sensor front RH/ON or OFF OFF: Touch sensor is not touched -
      DR TOUCH SENSOR Status of touch sensor rear LH/ON or OFF ON: Touch sensor is touched -
      DR TOUCH SENSOR Status of touch sensor rear LH/ON or OFF OFF: Touch sensor does not touched -
      DP TOUCH SENSOR Status of touch sensor rear RH/ON or OFF ON: Touch sensor is touched -
      DP TOUCH SENSOR Status of touch sensor rear RH/ON or OFF OFF: Touch sensor does not touched -

      OK: 

      "ON" (screen is touched) appears on the tester screen. 

    1. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. NG : Go to next step. 
  2. CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR OSCILLATOR) 
    1. Disconnect the D39 and D40 ECU connector.
    2. Disconnect the oscillator connectors.
    3. Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.

      Standard: Below 1 Ω 

    4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.

      Standard: 10 kΩ or higher 

      HINT:

      Refer to the wiring diagram for connection of each terminal.

      Fig 1: Disconnecting D39 And D40 ECU Connector
      G02977163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Disconnecting Door Oscillator Connector
      G02977164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK : Go to next step. 
  3. INSPECT CERTIFICATION ECU 
    1. Reconnect the ECU and the oscillator connectors.
    2. Connect the hand-held tester to the DLC3.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value (s) in the table below.

      Standard: 

      CERTIFICATION ECU VOLTAGE

      Tester Connection Condition Specified Condition
      SEL1 (D39-5) - Body ground Move the key more than 5 m (16.4 ft) away from the front door LH --> Bring it to the outside handle 10 to 14 V --> Below 1 V
      SEL2 (D39-6) - Body ground Move the key more than 5 m (16.4 ft) away from the front door RH --> Bring it to the outside handle 10 to 14 V --> Below 1 V
      SEL3 (D40-1) - Body ground Move the key more than 5 m (16.4 ft) away from the rear door LH --> Bring it to the outside handle 10 to 14 V --> Below 1 V
      SEL4 (D40-2) - Body ground Move the key more than 5 m (16.4 ft) away from the rear door RH --> Bring it to the outside handle 10 to 14 V --> Below 1 V
      SEN1 (D39-22) - Body ground Front door LH outside handle is not held --> Front door LH outside handle is held 10 to 14 V --> Below 1 V
      SEN2 (D39-23) - Body ground Front door LH outside handle is not held --> Front door LH outside handle is held 10 to 14 V --> Below 1 V
      SEN4 (D40-27) - Body ground Rear door LH outside handle is not held --> Rear door LH outside handle is held 10 to 14 V --> Below 1 V
      SEN3 (D40-28) - Body ground Rear door LH outside handle is not held --> Rear door LH outside handle is held 10 to 14 V --> Below 1 V
      Fig 3: Inspecting Certification ECU
      G02977165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. NG : Go to next step. 
  4. REPLACE DOOR OSCILLATOR (CHECK OPERATION OF DOOR OSCILLATOR) 
    1. Replace the door oscillator.
    2. Check that the entry UNLOCK function operates normally.

      OK: 

      Entry UNLOCK function operates normally. 

    1. NG : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. OK : END (DOOR OSCILLATOR IS DEFECTIVE) 
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