MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

Vehicles, which are equipped with the ABS (Anti-Lock Brake System), detect the vehicle speed using the skid control ECU and wheel speed sensor. The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the transmission control ECU. The transmission control ECU determines the vehicle speed based on the frequency of the pulse signal.

A0138LFE02
DTC No. DTC Detection Conditions Trouble Areas
P0500

The transmission control ECU detects the following conditions simultaneously for 4 seconds or more:

(1 trip detection logic)


  1. Vehicle is being driven: Transmission revolution sensor signal is 1,650 rpm or more

  2. Vehicle speed signal is 9 km/h (5.6 mph) or less

  3. Gear is engaged

  • Open or short in speed sensor circuit

  • Speed sensor (Brake control system)

  • Skid control ECU (Brake control system)

  • Transmission control ECU

WIRING DIAGRAM

A0138ZYE03

When a DTC P0500 is output, a ground short in the wiring of terminal SPD or an internal ground short in the relevant ECU is suspected.

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester ON.

    3. Select the following menu items: Powertrain / Multi-Mode M/T / Data List / Vehicle Speed and Vehicle Speed Signal.

    4. Check that the speed displayed on the tester screen is the same as the one indicated on the combination meter.

      Items

      [Abbreviation]

      		 Measurement Items: Display Normal Conditions Diagnostic Notes

      Vehicle Speed

      [Vehicle Spd]

      Vehicle speed:

      Min.: 0 km/h, Max.: 255 km/h

      		 Same as actual vehicle speed When vehicle speed signal malfunctions, speed value calculated from transmission input revolution signal displayed

      Vehicle Speed Signal

      [Vehicle Spd Sig]

      Vehicle speed signal:

      Min.: 0 km/h, Max.: 327.675 km/h

      		 Same as actual vehicle speed When vehicle speed signal malfunctions, speed value calculated from transmission input revolution signal displayed
      OK
      The speed displayed on the tester screen is approximately equal to the actual speed.

    OK

    CHECK FOR INTERMITTENT PROBLEMS

    NG

  2. CHECK OPERATION OF SPEEDOMETER


    1. Drive the vehicle and check if the function of the speedometer in the combination meter is normal.

      OK
      The actual vehicle speed and the speed indicated on the speedometer are the same.

      Tech Tips

      The vehicle speed sensor is functioning normally when the indication on the speedometer is normal.


    NG

    CHECK BRAKE CONTROL SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - SKID CONTROL ECU)

    A0138K0E02

    1. Disconnect the transmission control ECU connector.

    2. Disconnect the skid control ECU connector.

    3. Check the resistance.

      Standard Resistance
      Tester Connections Specified Conditions
      SPD (A28-23) - SP1 (A21-23) Below 1 Ω

      SPD (A28-23) or SP1 (A21-23) - Body

      ground

      		 10 kΩ or higher

    4. Reconnect the transmission control ECU connector.

    5. Reconnect the skid control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY