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

DTC Code DTC Name
B2281 "P" Signal Malfunction

DESCRIPTION

This DTC is stored when there is an abnormal circuit between the power management control ECU and the shift lock control ECU.

Tech Tips

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). 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 Communication or the communication line between the power management control ECU and shift lock control ECU is abnormal.

  • Power management control ECU

  • Shift lock control ECU

  • Harness or connector

WIRING DIAGRAM

A006VA1E01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (SHIFT P SIGNAL)


    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 / Power Source Control / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Shift P Signal Shift P position signal/ON or OFF

      ON: Shift lever in P

      OFF: Shift lever not in P

      		 -
      OK
      ON (shift lever in P) or OFF (shift lever not in P) appears on the screen according to the shift lever position.

    NG

    INSPECT SHIFT LOCK CONTROL ECU Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  2. INSPECT SHIFT LOCK CONTROL ECU


    1. A006UJOE01
      Text in Illustration
      *1

      Component with harness connected

      (Shift Lock Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (P2) - 1 (E) Shift lever in P Below 1 Ω
      7 (P2) - 1 (E) Shift lever not in P 10 kΩ or higher

    NG

    REPLACE SHIFT LOCK CONTROL ECU Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU AND BODY GROUND - SHIFT LOCK CONTROL ECU)


    1. Disconnect the D75 connector from the power management control ECU.

      A006T9NE01

    2. Disconnect the D4 connector from the shift lock control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D75-16 (P) - D4-7 (P2) Always Below 1 Ω
      D75-16 (P) or D4-7 (P2) - Body ground Always 10 kΩ or higher
      D4-1 (E) - Body ground Always Below 1 Ω
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2

      Front view of wire harness connector

      (to Shift Lock Control ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here