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

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

A0162YAE02
DTC Code

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. Speed sensor (SP2) signal is not input

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

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM
P0502

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

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

  3. 2 seconds

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM
P0503

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

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

  3. 2 seconds

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM

MONITOR DESCRIPTION

The output speed sensor SP2 monitors the output shaft speed.

The ECM controls the gearshift point and the lock up timing based on the signals from the output speed sensor SP2 and throttle position sensor.

If the ECM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, it will conclude that is a malfunction of the output speed sensor SP2.

The ECM will illuminate the MIL and set a DTC.

WIRING DIAGRAM

A0163HOE10

INSPECTION PROCEDURE

Tech Tips

Using the intelligent tester 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. Warm up the engine.

  2. Turn the engine switch off.

  3. Connect the intelligent tester to the DLC3.

  4. Turn the engine switch on (IG).

  5. Turn the intelligent tester on.

  6. Enter the following menus: Powertrain / ECT / Data List.

  7. According to the display on the intelligent tester, read the Data List.

    TCM
    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 tester is much lower than the actual vehicle speed: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

PROCEDURE


  1. CHECK SPEED SENSOR TERMINAL (SP2 TERMINAL)


    1. A015ZNTE12

      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
      E47-21 (SP2B) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E47-22 (SP2O) - Body ground Always 99 to 101 Ω

    NG

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

    OK

  2. INSPECT TRANSMISSION WIRE (SPEED SENSOR SP2)


    1. A0160QFE01

      Disconnect the speed 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 speed sensor (SP2) connector - 21 (SP2B) Always Below 1 Ω
      Terminal 2 of the speed sensor (SP2) connector - 22 (SP2O) Always Below 1 Ω
      Terminal 1 of the speed sensor (SP2) connector or 21 (SP2B) - Body ground Always 10 kΩ or higher
      Terminal 2 of the speed sensor (SP2) connector or 22 (SP2O) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    OK

    REPLACE SPEED SENSOR Click here

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


    1. A016249E26

      Disconnect the transmission wire connector.

    2. Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E47-21 (SP2B) - E59-23 (SP2B) Always Below 1 Ω
      E47-22 (SP2O) - E59-22 (SP2O) Always Below 1 Ω
      E47-21 (SP2B) or E59-23 (SP2B) - Body ground Always 10 kΩ or higher
      E47-22 (SP2O) or E59-22 (SP2O) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM A/T CODE REGISTRATION Click here