SMART ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2282

DTC Code DTC Name
B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

The main body ECU receives vehicle speed information using 2 methods. It receives a speed signal from the combination meter assembly. It also receives speed information from the combination meter assembly via CAN. If the information sent using these 2 methods is inconsistent, this DTC will be stored.

Tech Tips

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No. DTC Detection Condition Trouble Area
B2282 The speed information received by the main body ECU from the combination meter assembly via a direct line and via CAN is inconsistent.

  • CAN communication system

  • Combination meter assembly

  • Main body ECU

  • Wire harness or connector

WIRING DIAGRAM


  1. for 2GR-FE

    A01CB84E02

  2. for 2AZ-FE

    A01CB0EE02

    Tech Tips


    • A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.

    • If a short occurs in an ECU, all systems in the wiring diagram will not operate normally.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication DTCs are output.

      Tech Tips

      If DTCs for the CAN communication system are output, inspect those DTCs first.

      OK
      CAN communication DTCs are not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK SPEEDOMETER OPERATION


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Combination Meter / Data List.

    5. Check the Data List for proper functioning of the vehicle speed signal.

      Combination Meter
      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 same as actual speed (When driving) -
      OK
      Vehicle speed displayed on the intelligent tester is almost the same as the actual vehicle speed.

    NG

    GO TO METER/GAUGE SYSTEM (Speedometer Malfunction) Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED SIGNAL)


    1. Enter the following menus: Body / Main Body / Data List.

    2. Read the Data List according to the display on the intelligent tester.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Specified Condition
      Vehicle speed signal Vehicle speed signal / Stop or Run

      Stop: Vehicle stopped

      Run: Vehicle running

      		 -
      OK
      Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen.

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER - MAIN BODY ECU) Click here

    OK

    REPLACE MAIN BODY ECU Click here

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - MAIN BODY ECU)


    1. Disconnect the G19 connector from the combination meter.

    2. Disconnect the G50 connector from the main body ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G19-24 (+S) - G50-9 (SPD) Always Below 1 Ω
      G19-24 (+S) - Body ground Always 10 kΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER - NO. 2 JUNCTION BLOCK) Click here

    OK

  5. INSPECT COMBINATION METER ASSEMBLY


    1. A01CFDDE04

      Remove the combination meter Click here.

    2. Reconnect the G19 connector to the combination meter.

    3. Reconnect the G50 connector to the main body ECU.

    4. Connect an oscilloscope to terminal G19-24 (+S) and body ground.

    5. Turn the engine switch on (IG).

    6. Turn the wheel slowly.

    7. Check the signal waveform according to the condition(s) in the table below.

      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)
      OK
      The waveform is displayed as shown in the illustration.

      Tech Tips

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.


    NG

    GO TO METER / GAUGE SYSTEM (Speed Signal Circuit) Click here

    OK

    REPLACE MAIN BODY ECU Click here

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER - NO. 2 JUNCTION BLOCK)


    1. Disconnect the LA to LD No. 2 junction block connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G19-24 (+S) - LA-4*1 Always Below 1 Ω
      G19-24 (+S) - LD-4*2 Always Below 1 Ω
      G19-24 (+S) - Body ground Always 10 kΩ or higher

      • *1: for RHD

      • *2: for LHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - NO. 2 JUNCTION BLOCK)

    OK

  7. CHECK HARNESS AND CONNECTOR (MAN BODY ECU - NO. 2 JUNCTION BLOCK)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-9 (SPD) - LB-4 Always Below 1 Ω
      G50-9 (SPD) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - NO. 2 JUNCTION BLOCK)

    OK

    REPLACE NO. 2 JUNCTION BLOCK