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Home >> Toyota >> 2007 >> Avalon Limited >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door Lock >> Smart Key System >> Touch Sensor Circuit >> Inspection Procedure

Inspection Procedure

  1. READ VALUE ON INTELLIGENT TESTER 
    1. Connect the intelligent 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): 

    ECU CERTIFICATION REFERENCE

    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
    OFF: Touch sensor is not touched    		 -
    P TOUCH SENSOR Status of touch sensor front RH / ON or OFF ON: Touch sensor is touched
    OFF: Touch sensor is not touched    		 -
    DR TOUCH SENSOR Status of touch sensor rear LH / ON or OFF ON: Touch sensor is touched
    OFF: Touch sensor dose not touched    		 -
    DP TOUCH SENSOR Status of touch sensor rear RH / ON or OFF ON: Touch sensor is touched
    OFF: Touch sensor dose not touched    		 -

    OK: 

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

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  . 

    NG: Go to Next Step 

  2. CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR OSCILLATOR) 
    1. Disconnect the D39 and D40 ECU connector.
      Fig 1: Identifying D39 And D40 ECU Connector
      G05006056Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      Resistance: 

      Below 1 Ω 

      Fig 2: Identifying Door Oscillator Connectors
      G05006057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.

      Resistance: 

      10 kΩ or higher 

      HINT:

      Refer to the wiring diagram for connection of each terminal.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. INSPECT CERTIFICATION ECU 
    1. Reconnect the ECU and the oscillator connectors.
    2. Connect the intelligent tester to the DLC3.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

    Voltage 

    Fig 3: Identifying Certification ECU Connector
    G05006058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE REFERENCE CHART

    Tester Connection Condition Specified Condition
    SEL1 (D39-S) - 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 1V
    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 1V
    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 1V
    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 1V
    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 1V
    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 1V
    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 1V
    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 1V

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  . 

    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. 

    NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  . 

    OK: END (DOOR OSCILLATOR IS DEFECTIVE) 

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