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

DTC Code DTC Name
B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

The power management control ECU receives vehicle speed information using 2 methods. It receives a speed signal from the meter ECU via a direct line, and from the skid control ECU via CAN. If the information sent using these 2 methods is inconsistent, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B2282 Speed information received by the power management control ECU via direct line and via CAN is inconsistent.

  • CAN communication system

  • Combination meter assembly

  • Power management control ECU

  • No. 4 junction block

  • Wire harness or connector

WIRING DIAGRAM

A003UGYE01

Tech Tips


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

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

INSPECTION PROCEDURE

Note


  • When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication DTCs are output.

      Tech Tips

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

      OK
      CAN communication DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    OK

  2. CHECK SPEEDOMETER OPERATION


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power 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, Max.: 255 Almost same as actual speed (When driving) -
      OK
      Vehicle speed displayed on the intelligent tester is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

    NG

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

    OK

  3. READ VALUE USING INTELLIGENT TESTER


    1. Enter the following menus: Body / Power Source Control / Data List.

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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      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

    Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  4. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the E111 and E112 connectors from the power management control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E111-1 (AM22) - Body ground Always 9.5 to 16 V
      E112-7 (AM21) - Body ground Always 9.5 to 16 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E111-5 (E01) - Body ground Always Below 1 Ω
      E111-6 (E1) - Body ground Always Below 1 Ω
      E112-4 (E12) - Body ground Always Below 1 Ω
      E112-5 (E02) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

    OK

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the E46 connector from the combination meter assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E111-14 (SPDI) - E46-36 (+S) Always Below 1 Ω
      E111-14 (SPDI) - Body ground Always 10 kΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 4 JUNCTION BLOCK) Click here

    OK

  7. INSPECT COMBINATION METER ASSEMBLY


    1. A003T12E51
      Text in Illustration
      *1

      Component with harness connected

      (Combination Meter Assembly)

      Remove the combination meter Click here.

    2. Reconnect the E46 connector to the combination meter assembly.

    3. Reconnect the E111 connector to the power management control ECU.

    4. Connect an oscilloscope to terminal E46-36 (+S) and body ground.

    5. Turn the power switch on (IG).

    6. Turn a 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 Wheel being rotated
      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 POWER MANAGEMENT CONTROL ECU Click here

  8. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 4 JUNCTION BLOCK)


    1. Disconnect the 4B connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E46-36 (+S) - 4B-8 Always Below 1 Ω
      E46-36 (+S) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - NO. 4 JUNCTION BLOCK)

    OK

  9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION BLOCK)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E111-14 (SPDI) - 4B-20 Always Below 1 Ω
      E111-14 (SPDI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 4 JUNCTION BLOCK)

    OK

    REPLACE NO. 4 JUNCTION BLOCK