SMART ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2281

DTC Code DTC Name
B2281 "P" Signal Malfunction

DESCRIPTION

The main body ECU receives shift position information from 2 sources. It receives a shift position P signal from the shift lock control unit assembly via a direct line, and shift position information from the ECM via CAN. If the information from these 2 sources is inconsistent, this DTC will be stored.

Tech Tips

When the main body ECU is replaced with a new one and the cable from 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
B2281 The shift position information from the ECM (via CAN) and the shift lock control unit assembly (direct line) is inconsistent.

  • CAN communication system

  • Park/neutral position switch assembly

  • Shift lock control unit assembly

  • ECM

  • Main body ECU

  • Wire harness or connector

WIRING DIAGRAM

A01CDKTE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Clear the DTCs Click here.

    2. Check if CAN communication system DTCs are output.

      Tech Tips

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

      OK
      CAN communication system DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Check if SFI system DTCs are output Click here.

      Tech Tips

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

      Result
      Result Proceed to
      SFI DTCs are not output A
      SFI DTCs are output (for 2GR-FE) B
      SFI DTCs are output (for 2AZ-FE) C

    B

    GO TO SFI SYSTEM (for 2GR-FE) Click here

    C

    GO TO SFI SYSTEM (for 2AZ-FE) Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER


    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 / Main Body / Data List.

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

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Shift P Signal Shift P position/ON or OFF

      ON: Shift lever in P

      OFF: Shift lever not in P

      		 -
      OK
      ON (shift lever in P) and OFF (shift lever not in P) appear on the screen.

    NG

    CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY Click here

    OK

  4. CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Check the park/neutral position switch assembly installation condition (for 2GR-FE: Click here, for 2AZ-FE (U660E): Click here, 2AZ-FE (U241E): Click here.


    NEXT

  5. REPLACE MAIN BODY ECU


    1. Replace the main body ECU Click here.


    NEXT

  6. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check if DTC B2281 is output.

      Result
      Result Proceed to
      DTC B2281 is not output A
      DTC B2281 is output (for 2GR-FE) B
      DTC B2281 is output (for 2AZ-FE) C

    B

    REPLACE ECM (for 2GR-FE) Click here

    C

    REPLACE ECM (for 2AZ-FE) Click here

    A

    END (MAIN BODY ECU WAS DEFECTIVE)

  7. CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY


    1. A01CGDAE04
      Text in Illustration
      *1

      Component without harness connected

      (Shift Lock Control Unit Assembly)

      Disconnect the G17 connector from the shift lock control unit assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G17-11 (P2) - G17-3 (E) Shift lever in P Below 1 Ω
      G17-11 (P2) - G17-3 (E) Shift lever not in P 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for U660E) B
      NG (for U241E) C
      NG (for K112) D

    B

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (for U660E) Click here

    C

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (for U241E) Click here

    C

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (for K112) Click here

    A

  8. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL UNIT ASSEMBLY)


    1. Disconnect the G51 connector from the main body ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G51-2 (P) - G17-11 (P2) Always Below 1 Ω
      G51-2 (P) - Body ground Always 10 kΩ or higher
      G17-3 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL UNIT ASSEMBLY)

    OK

    REPLACE MAIN BODY ECU Click here