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 inputs it into the TCM as a signal.

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

A01GMQDE01
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 the engine switch on (IG), +B voltage is 8 V or higher

  2. Speed sensor (SP2) signal is not input

  3. 2 seconds (intake air temperature is -10°C (14°F) or higher); or 8 seconds (intake air temperature is below -10°C (14°F))

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM
P0502

  1. DTC P0500 is not stored

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

  3. 2 seconds

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM
P0503

  1. DTC P0500 is not stored

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

  3. 2 seconds

  4. 1 trip detection logic

  • Speed sensor (SP2)

  • Transmission wire

  • Harness and connector

  • TCM

MONITOR DESCRIPTION

The NT terminal of the TCM detects a pulse signal from the speed sensor (NT) (input rpm). The TCM calculates gear shifts comparing the signal from the speed sensor (NT) with that from the speed sensor (NC3).

If there is no signal from the speed sensor (SP2), or if the speed sensor (SP2) voltage is below 0.1 V or higher than 1.9 V, the TCM interprets this as a fault, illuminates the MIL and stores a DTC.

WIRING DIAGRAM

A01GHT5E02

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 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 equal to vehicle speed)

    		 -

    Tech Tips


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

    • SPD (SP2) 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.

PROCEDURE


  1. CHECK SPEED SENSOR TERMINAL (SP2 TERMINAL)


    1. A01GO0BE01

      Disconnect the E50 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
      E50-21 (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
      E50-22 (SP2O) - Body ground Always 100 Ω

    NG

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

    OK

  2. INSPECT TRANSMISSION WIRE (SPEED SENSOR SP2)


    1. A01GLGIE01

      Disconnect the speed sensor (SP2) connector.

    2. Disconnect the E50 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. A01GMANE07

      Disconnect the E50 transmission wire connector.

    2. Disconnect the E7 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E50-21 (SP2B) - E7-26 (SP2B) Always Below 1 Ω
      E50-22 (SP2O) - E7-18 (SP2O) Always Below 1 Ω
      E50-21 (SP2B) or E7-26 (SP2B) - Body ground Always 10 kΩ or higher
      E50-22 (SP2O) or E7-18 (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