AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

The speed sensors detect the wheel speed and send the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a pulse signal and outputs it to the TCM via the combination meter. The TCM determines the vehicle speed based on the frequency of this pulse signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0500

Vehicle Speed Sensor "A"

When the engine coolant temperature sensor is normal and the counter gear speed is 300 rpm or more, the vehicle speed signal is not input for 2 seconds or more (1-trip detection logic).

  • Open or short in vehicle speed signal circuit

  • Combination meter system

  • TCM

Comes on

DTC stored

MONITOR DESCRIPTION

The TCM assumes that the vehicle is being driven when the transmission counter gear speed is more than 300 rpm and over 30 seconds have passed since the park/neutral position switch was turned off. If there is no vehicle speed signal with these conditions satisfied, the TCM concludes that there is a vehicle speed signal malfunction. The TCM will turn on the MIL and store the DTC.

WIRING DIAGRAM

C279700E01
C279700E02

CAUTION / NOTICE / HINT

Note:

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

Click here

PROCEDURE

  1. READ VALUE USING GTS (VEHICLE SPEED)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Drive the vehicle.

    6. Read the value displayed on the GTS.

      Powertrain > ECT > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Vehicle Speed

      Vehicle speed

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      Actual vehicle speed

      -

      Powertrain > ECT > Data List

      Tester Display

      Vehicle Speed

      OK

      Vehicle speed displayed on GTS and speedometer display are equal.

    Result

    Proceed to

    OK

    NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click hereClick hereClick hereClick hereClick hereClick here

    NG

  2. CHECK COMBINATION METER SYSTEM

    1. Inspect the circuits that send vehicle speed signals to this system in the meter system.

      Click hereClick hereClick hereClick here

    2. During inspection for the meter section, if there is an instruction that indicates to go back to inspections for each system, proceed to the next step.

    Result

    Proceed to

    NEXT
    NEXT

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TCM)

    1. Disconnect the G16 combination meter assembly connector.

    2. Disconnect the B79 TCM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G16-6 (+S) - B79-3 (SPD)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TCM

    Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - TCM)

    1. for LHD:

      Disconnect the G108 No. 20 junction connector.

    2. for RHD:

      Disconnect the G112 No. 24 junction connector.

    3. Disconnect the B79 TCM connector.

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

      Standard Resistance

      Table 1. for LHD:

      Tester Connection

      Condition

      Specified Condition

      G108-15 - B79-3 (SPD)

      Always

      Below 1 Ω
      Table 2. for RHD:

      Tester Connection

      Condition

      Specified Condition

      G112-8 - B79-3 (SPD)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPAIR OR REPLACE JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR