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Home >> Scion >> 2007 >> tC Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transaxle System >> DTC P0793 Intermediate Shaft Speed Sensor "A" >> Inspection Procedure

Inspection Procedure

  1. DATA LIST 

    HINT:

    According to the DATA LIST displayed by the OBD II scan tool or 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.

    READ DATA LIST

    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect the OBD II scan tool or 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".
      TESTER DISPLAY COMPONENT OPERATING RANGE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SPD (NC) Counter Gear Speed/display: 50 r/min HINT:
      4th (O/D) when shift lever position is D position (After warming up the engine);
      • Intermediate shaft speed (NC) becomes close to the engine speed.
      		 -

      HINT:

      • SPD (NC) is always 0 while driving:

        Open or short in the sensor or circuit.

      • SPD (NC) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more:

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

  1. INSPECT SPEED SENSOR INSTALLATION 
    1. Check the speed sensor installation.

      OK: The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case. 

    NG: REPLACE SPEED SENSOR (NC) 

    Fig 1: Identifying Proper Position Of Speed Sensor Installation
    G04866105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

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

      Standard resistance 

      SPEED SENSOR STANDARD RESISTANCE SPECIFICATIONS

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

    NG: REPLACE SPEED SENSOR (NC) 

    Fig 2: Identifying Speed Sensor Connector Terminals
    G04866106Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.

      Standard resistance 

      HARNESS AND CONNECTOR STANDARD RESISTANCE SPECIFICATIONS

      Tester Connection Specified Condition 20°C (68°F)
      E7-34 (NC+) - E7-26 (NC-) 560 to 680 Ω
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for short) 

      HARNESS AND CONNECTOR STANDARD RESISTANCE SPECIFICATIONS (CHECK FOR SHORT)

      Tester Connection Specified Condition
      E7-34 (NC+) - Body ground 10 kΩ or higher
      E7-26 (NC-) - Body ground
      Fig 3: Identifying ECM Connector Terminals
      G04866107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

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