FixVault
Home › Lexus › 2007 › GX 470 › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle › Automatic Transmission System › DTC P0722: Output Speed Sensor Circuit No Signal › 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 ignition switch off.
    3. Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
    4. Turn the ignition switch to the ON 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".
    NORMAL CONDITION TABLE

    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 
      Fig 1: Identifying Clearance Between Sensor & Transmission Case
      G04963177Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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. 

      NG: SECURELY INSTALL SENSOR OR REPLACE SENSOR 

      OK: Go to Next Step 

    2. INSPECT SPEED SENSOR (SP2) 
      Fig 2: Identifying Speed Sensor (SP2)
      G05261226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the speed sensor connector from the transmission.
      2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Specified Condition 20°C (68°F)
      1 - 2 560 to 680 Ω

      NG: REPLACE SPEED SENSOR (SP2) 

      OK: Go to Next Step 

    3. CHECK WIRE HARNESS AND CONNECTOR (SPEED SENSOR SP2 - ECM) 
      1. Connect the speed sensor connector.
        2. Fig 3: Disconnecting ECM Connector
        G05261227Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the ECM connector.
      3. Measure the resistance according to the value (s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION TABLE

        Tester Connection Specified Condition 20°C (68°F)
        E6-34 (SP2+) - E6-26 (SP2-) 560 to 680 Ω
      4. Measure the resistance according to the value (s) in the table below.

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Specified Condition
      E6-34 (SP2+) - Body ground 10 kΩ or higher
      E6-26 (SP2-) - Body ground ↑

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE ECM 

About FixVault