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) or VSC (Vehicle Stability Control), 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 Condition Trouble Area
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 1650 rpm or more

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

  3. Gear is engaged

  • Wire harness or connector

  • Speed sensor (Brake control system)

  • Skid control ECU (Brake control system)

  • Transmission control ECU

WIRING DIAGRAM

A01389KE01

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 (VEHICLE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Multi-Mode M/T / Data List / Vehicle Speed and Vehicle Speed Signal.

    5. Drive the vehicle.

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

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note

      Vehicle Speed

      [Vehicle Spd]

      Vehicle speed:

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

      		 0 km/h (0 mph): Vehicle stationary Approximately same value as combination meter display 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

      		 0 km/h (0 mph): Vehicle stationary 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.

    NG

    CHECK OPERATION OF SPEEDOMETER Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  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

    GO TO BRAKE CONTROL SYSTEM

    OK

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


    1. Disconnect the A28 transmission control ECU connector.

    2. Disconnect the A46 skid control ECU connector (w/o VSC System).

    3. Disconnect the A41 skid control ECU connector (w/ VSC System).

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

      Standard Resistance
      w/o VSC System:
      Tester Connection Condition Specified Condition
      A28-23 (SPD) - A46-2 (SP1) Always Below 1 Ω

      A28-23 (SPD) or A46-2 (SP1) - Body

      ground

      		 Always 10 kΩ or higher
      Standard Resistance
      w/ VSC System:
      Tester Connection Condition Specified Condition
      A28-23 (SPD) - A41-33 (SP1) Always 19 to 22 Ω

      A28-23 (SPD) or A41-33 (SP1) - Body

      ground

      		 Always 10 kΩ or higher

    5. Reconnect the transmission control ECU connector.

    6. Reconnect the skid control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TRANSMISSION CONTROL ECU


    1. Replace the transmission control ECU Click here.


    NEXT

  5. PERFORM INITIALIZATION


    1. Perform the initialization and learning for multi-mode manual transaxle system Click here.


    NEXT

    END