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Home >> Toyota >> 2009 >> Corolla S, 1.8 L, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - U250E) >> Automatic Transaxle System >> DTC P0793 Intermediate Shaft Speed Sensor "A" >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

Using Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic 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. READ DATA LIST 
    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect Techstream to the DLC3.
    4. Turn the ignition switch to the on position.
    5. Turn on the tester.
    6. Select the item "Powertrain/Engine and 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 (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)  (See REMOVAL )

      Fig 1: Inspecting Speed Sensor Installation
      G04975886Courtesy 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 

      RESISTANCE SPECIFICATION

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

      NG: REPLACE SPEED SENSOR (NC)  (See REMOVAL )

      Fig 2: Identifying B91 Connector Terminals
      G06011393Courtesy 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 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      B31-101 (NC+) - B31-102 (NC-) 20°C (68°F) 560 to 680 Ω
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      B31-101 (NC+) - Body ground Always 10 kΩ or higher
      B31-102 (NC-) - Body ground Always
      Fig 3: Identifying B31 Connector Terminals
      G06011394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE ECM  (See FAIL-SAFE CHART )

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