AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0500, P0502, P0503

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"
P0502 Vehicle Speed Sensor "A" Circuit Low
P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High

DESCRIPTION

The transmission revolution sensor (SP2) detects the output shaft rotation speed and sends it to the TCM.

Based on the transmission revolution sensor (NT) signal and the transmission revolution sensor (SP2) signal, the TCM controls engine torque and shift timing.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0500

  1. 3 seconds or more after turning engine switch on (IG), +B voltage is 0 V or more

  2. Transmission revolution sensor (SP2) signal is not input

  3. 2 seconds (intake temperature -10°C (14°F) or more) or 8 seconds (intake temperature less than -10°C (14°F))

  4. 1 trip detection logic

  • Transmission revolution sensor (SP2)

  • Transmission wire

  • Harness or connector

  • TCM
P0502

  1. 3 seconds or more after turning engine switch on (IG), +B voltage is 0 V or more

  2. Transmission revolution sensor (SP2) input signal voltage is less than 0.1 V

  3. 2 seconds

  4. 1 trip detection logic

  • Transmission revolution sensor (SP2)

  • Transmission wire

  • Harness or connector

  • TCM
P0503

  1. 3 seconds or more after turning engine switch on (IG), +B voltage is 0 V or more

  2. Transmission revolution sensor (SP2) input signal voltage is more than 1.9 V

  3. 2 seconds

  4. 1 trip detection logic

  • Transmission revolution sensor (SP2)

  • Transmission wire

  • Harness or connector

  • TCM

MONITOR DESCRIPTION

The transmission revolution sensor (SP2) monitors the output shaft speed.

The TCM controls the gearshift point and the lock up timing based on the signals from the transmission revolution sensor (SP2) and throttle position sensor.

If the TCM detects no signal from the transmission revolution sensor (SP2) even while the vehicle is moving, it will conclude that is a malfunction of the transmission revolution sensor (SP2).

The TCM will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A01FE42E01

INSPECTION PROCEDURE

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced Click here.


  1. DATA LIST

    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.

    Tech Tips

    Using the GTS 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.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / ECT / Data List / SPD (SP2).

    7. According to the display on the GTS, read the Data List.

      ECT
      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)

      		 -

      Tech Tips


      • SPD (SP2) is always 0 while driving: Open or short in the sensor or circuit.

      • The SPD (SP2) value displayed on the GTS is much lower than the actual vehicle speed: Sensor malfunction, improper installation, or intermittent connection malfunction of the circuit.

PROCEDURE


  1. READ VALUE USING GTS (SP2 SENSOR VOLTAGE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / ECT / Data List / SP2 Sensor Voltage.

    5. According to the display on the GTS, read the Data List.

      ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SP2 Sensor Voltage

      SP2 sensor voltage/

      Min.: 0 V

      Max.: 5 V

      		 0.1 to 1.9 V: Idling -
      Result
      Result Proceed to
      Data List value is not within the normal condition A
      Data List value is within the normal condition B

    B

    REPLACE TCM Click here

    A

  2. CHECK TRANSMISSION REVOLUTION SENSOR TERMINAL (SP2 TERMINAL)


    1. A01FF0FE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the transmission wire connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F73-21 (SP2B) - Body ground Engine switch on (IG) 11 to 14 V

    4. Turn the engine switch off.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F73-22 (SP2O) - Body ground Always 99 to 101 Ω

    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    OK

  3. INSPECT TRANSMISSION WIRE (TRANSMISSION REVOLUTION SENSOR (SP2))


    1. A01FFDAE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Revolution Sensor (SP2))
      *b

      Component without harness connected

      (Transmission Wire)

      Disconnect the transmission revolution sensor (SP2) connector Click here.

    2. Disconnect the transmission wire connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal 1 of the transmission revolution sensor (SP2) connector - 21 (SP2B) Always Below 1 Ω
      Terminal 2 of the transmission revolution sensor (SP2) connector - 22 (SP2O) Always Below 1 Ω
      Terminal 1 of the transmission revolution sensor (SP2) connector or 21 (SP2B) - Body ground Always 10 kΩ or higher
      Terminal 2 of the transmission revolution sensor (SP2) connector or 22 (SP2O) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    OK

    REPLACE TRANSMISSION REVOLUTION SENSOR (SP2) Click here

  4. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the F73 transmission wire connector.

    2. Disconnect the F72 TCM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F73-21 (SP2B) - F72-23 (SP2B) Always Below 1 Ω
      F73-22 (SP2O) - F72-22 (SP2O) Always Below 1 Ω
      F73-21 (SP2B) or F72-23 (SP2B) - Body ground Always 10 kΩ or higher
      F73-22 (SP2O) or F72-22 (SP2O) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM A/T CODE REGISTRATION Click here