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Home >> Lexus >> 2007 >> GS 430 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Electronic Controlled Automatic Transmission System >> DTC P0500 Vehicle Speed Sensor "A" >> Inspection Procedure

Inspection Procedure

  1. DATA LIST 

    HINT:

    According to the DATA LIST displayed by the intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

    NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
    1. Warm up the engine.
    2. Turn the engine switch off.
    3. Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
    4. Turn the engine switch on (IG) position.
    5. Turn on the tester.
    6. Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST".
    7. According to the display on the tester, read the "DATA LIST".
    DATA LIST

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    SPD (SP2) Output shaft speed/
    Min.: 0 km/h (0 mph)
    Max.: 255 km/h (158 mph)    		 Vehicle stopped: 0 km/h (0 mph)
    (output shaft speed is equal to vehicle speed)    		 -

    HINT:

    • SPD (SP2) is always 0 while driving:

      Open or short in the sensor or circuit.

    • SPD (SP2) value displayed on the tester is much lower than the actual vehicle speed:

      Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

  1. INSPECT SPEED SENSOR INSTALLATION 
    1. Check the speed sensor (SP2) installation.

      OK: 

      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case. 

    Fig 1: Identifying Proper Installation Position Of Speed Sensor
    G05294640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SPEED SENSOR (SP2) 

    OK: Go to next step 

  2. INSPECT SPEED SENSOR (SP2) 
    1. Disconnect the speed sensor connector from the transmission.
    2. Measure the resistance according to the value (s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition 20°C (68°F)
      1 - 2 560 to 680 Ω
    Fig 2: Identifying Speed Sensor (SP2) Connector Terminals
    G05288076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SPEED SENSOR (SP2) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM) 
    1. Connect the speed sensor connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value (s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition 20°C (68°F)
      E7 - 23 (SP2+)- E7 - 22 (SP2-) 560 to 680 Ω
    4. Measure the resistance according to the value (s) in the table below.

      Resistance (Check for short) 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E7 - 23 (SP2+) - Body ground 10 kΩ or higher
    Fig 3: Disconnecting ECM Connectors
    G05295212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Specified Condition
    E7 - 22 (SP2-) - Body ground ↑

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

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