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

DTC Code DTC Name
B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

This DTC is stored when a mismatch between the vehicle speed signal from the direct line sent by the combination meter sub-assembly and the vehicle speed signal sent via CAN communication is detected.

Tech Tips


  • When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).

  • When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2282 Mismatch between the vehicle speed signal from the direct line sent by the combination meter sub-assembly and the vehicle speed signal sent via CAN communication (1-trip detection logic*).

  • CAN communication system

  • Combination meter sub-assembly

  • Power management control ECU

  • Junction Connector

  • Wire harness or connector

 Drive the vehicle for 20 seconds at a vehicle speed of 25 km/h (16 mph) or more, and then drive the vehicle at a vehicle speed that is less than 5 km/h (3 mph) for 20 seconds.

Vehicle Condition and Fail-safe Function when Malfunction Detected
DTC Code Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
B2282

  • When the signal from the direct line or CAN communication is malfunctioning and indicates no vehicle speed, there is no effect on vehicle behavior.

  • When the signal from the direct line or CAN communication is malfunctioning and indicates that the vehicle is moving, the power source mode cannot be turned from on (IG) to off.

 -

WIRING DIAGRAM

A005EX7E03

Tech Tips


  • A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter sub-assembly. The signal is changed to a pulse signal at the transistor in the combination meter sub-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.

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and vehicle begins, or 2) connect the GTS to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

    for Power Source Control: Body Electrical / Power Source Control / Trouble Codes.

    for Entry&Start: Body Electrical / Entry&Start / Trouble Codes.

  • The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

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

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Tech Tips

Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2282

    Power Source Control

  • Vehicle Speed Signal

  • Power Supply Condition


    Combination Meter

  • Vehicle Speed Meter

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PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication DTCs are output.

      Tech Tips

      If any DTCs for the CAN communication system 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 GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / 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 the same as actual vehicle speed -
      OK
      Vehicle speed displayed on the GTS 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 GTS


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

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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle speed signal Vehicle moving or stationary/Stop or Run

      Stop: Vehicle stopped

      Run: Vehicle moving at 5 km/h (3 mph) or more

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

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

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


    1. Disconnect the L5 and L6 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
      L5-1 (AM22) - Body ground Always 9.5 to 16 V
      L6-7 (AM21) - Body ground Always 9.5 to 16 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    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
      L5-5 (E01) - Body ground Always Below 1 Ω
      L5-6 (E1) - Body ground Always Below 1 Ω
      L6-4 (E12) - Body ground Always Below 1 Ω
      L6-5 (E02) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the L27 connector from the combination meter sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L5-14 (SPDI) - L27-15 (+S) Always Below 1 Ω
      L5-14 (SPDI) - Body ground Always 10 kΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - JUNCTION CONNECTOR) Click here

    OK

  7. INSPECT COMBINATION METER SUB-ASSEMBLY


    1. A005EGME03
      Text in Illustration
      *a

      Component with harness connected

      (Combination Meter Sub-assembly)

      Remove the combination meter sub-assembly Click here.

    2. Reconnect the L27 connector to the combination meter sub-assembly.

    3. Reconnect the L5 connector to the power management control ECU.

    4. Connect an oscilloscope to terminal L27-15 (+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 Driving at approx. 20 km/h (12 mph)
      OK
      The waveform is similar to that 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.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

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

  8. CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - JUNCTION CONNECTOR)


    1. Disconnect the L70 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      L27-15 (+S) - L70-32*1

      L27-15 (+S) - L70-31*2

      		 Always Below 1 Ω
      L27-15 (+S) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    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
      L5-14 (SPDI) - L70-22 Always Below 1 Ω
      L5-14 (SPDI) - Body ground Always 10 kΩ or higher

    OK

    REPLACE JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR