METER / GAUGE SYSTEM Speedometer Malfunction

DTC Code DTC Name
Speedometer Malfunction

DESCRIPTION

The combination meter assembly receives vehicle speed signals from the brake actuator assembly (skid control ECU) via the CAN communication system. The speed sensor detects the wheel speed and sends the appropriate signals to the brake actuator assembly (skid control ECU). The brake actuator assembly (skid control ECU) supplies power to the vehicle speed sensor. The brake actuator assembly (skid control ECU) detects vehicle speed signals based on pulses of the voltage.

Tip:

  • Factors that affect the indicated vehicle speed include the tire size, tire inflation and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using the GTS. For details about testing and the margin of error, see the reference chart.

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  • If the vehicle speed sensor circuit has a malfunction, the brake actuator assembly (skid control ECU) stores DTCs. Troubleshoot the anti-lock brake system or vehicle stability control system.

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WIRING DIAGRAM

E143765E87

CAUTION / NOTICE / HINT

Note:

  • If the vehicle speed is outside the allowable range when tested, perform the on-vehicle inspection.

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  • When it is necessary to replace the combination meter assembly, be sure to replace it with a new one.

Tip:

Before starting the following inspection, check tire size and tire air pressure.

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication system DTCs are output.

      Click here

      Body Electrical > Combination Meter > Trouble Codes

    Result

    Result

    Proceed to

    CAN communication system DTCs are not output.

    A

    CAN communication system DTCs are output.

    B
    B

    GO TO CAN COMMUNICATION SYSTEM

    Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (Speed Meter Operation)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Body Electrical > Combination Meter > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Speed Meter Operation

      Speedometer

      • OFF, 0, 40, 80 mph*1

      • OFF, 0, 40, 80, 120, 160 km/h*2

      There is a deviation in the values displayed on the speedometer (Control range → Speedometer display)

      • Reference mph*1:

      • 40 → 42 to 44.5

      • 80 → 83.1 to 87.1

      • Reference km/h*2:

      • 40 → 41.7 to 46.2

      • 80 → 83.4 to 88.4

      • 120 → 125.1 to 130.6

      • 160 → 166.2 to 173.2

      • *1: for Speedometer with Imperial Units for Main Scale

      • *2: for Speedometer with Metric Units for Main Scale

      Body Electrical > Combination Meter > Active Test

      Tester Display

      Speed Meter Operation

      OK

      Speedometer indication is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE COMBINATION METER ASSEMBLY

    Click here

    OK

  3. CHECK FOR DTC

    1. Check if anti-lock brake system or vehicle stability control system DTCs are output.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Result

    Proceed to

    DTCs are not output.

    A

    DTCs are output.

    B
    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM

    Click here

    A

  4. READ VALUE USING GTS (Vehicle Speed, Vehicle Speed Meter)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus:

      1. for ABS/VSC/TRC: Chassis / ABS/VSC/TRC / Data List.

      2. for Combination Meter: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Vehicle Speed

      Maximum wheel speed sensor reading

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      Vehicle stopped: 0 km/h (0 mph)

      When driving at constant speed: No large fluctuations

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Vehicle Speed

      Body Electrical > Combination Meter > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Vehicle Speed Meter

      Vehicle speed

      Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

      Almost the same as actual vehicle speed

      -

      Body Electrical > Combination Meter > Data List

      Tester Display

      Vehicle Speed Meter

    Result

    Result

    Proceed to

    The data list values of the ECUs match.

    A

    The data list values of the ECUs do not match.

    B
    Tip:

    • When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.

    • When the Data List values of the ECUs do not match, a signal output malfunction of the brake actuator assembly (skid control ECU) or an internal malfunction of the combination meter assembly is suspected.

    A

    REPLACE COMBINATION METER ASSEMBLY

    Click here

    B

  5. REPLACE COMBINATION METER ASSEMBLY

    1. Replace the combination meter assembly with a new or known good one.

      Click here

      OK

      The operation of the speedometer returns to normal.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    Click here