PUSH-BUTTON START, Diagnostic DTC:B2285

DTC Code DTC Name
B2285 Steering Lock Position Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when the steering lock position signal sent by the steering lock ECU (steering lock actuator assembly) via direct line and the steering lock position signal sent via LIN communication do not match.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2285 Steering Lock Position Signal Circuit Malfunction The steering lock position signal sent by the steering lock ECU (steering lock actuator assembly) via direct line and the steering lock position signal sent via LIN communication do not match. (1-trip detection logic*)

  • AM2 fuse

  • Steering lock ECU (steering lock actuator assembly)

  • Power management control ECU

  • Wire harness or connector

    DTC Output Confirmation Operation:

  • Disconnect the cable from the negative (-) auxiliary battery terminal, wait 30 seconds and then reconnect the cable to the negative (-) auxiliary battery terminal. Wait 40 seconds or more with the power switch off (with the steering locked), then turn the power switch on (ACC) (steering unlocked) and wait 40 seconds or more.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The hybrid control system cannot be started. The ECU does not send a hybrid control system start request.
Related Data List and Active Test Items
DTC No. Data List and Active Test
B2285

    Power Source Control

  • Steering Unlock Switch


    Entry&Start

  • Power Supply Short

  • Motor Driver Short

  • Lock Bar Stuck Error

WIRING DIAGRAM

A00218NE05
*a from Auxiliary Battery
*b Steering Lock ECU (Steering Lock Actuator Assembly)
*c Power Management Control ECU
*d LIN Communication Line

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The push-button start uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

    Click here

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

  • Before replacing the power management control ECU or steering lock ECU (steering lock actuator assembly), refer to push-button start Precaution.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      Body Electrical > Entry&Start > Trouble Codes

      Tech Tips


      • If the steering cannot be unlocked, the hybrid control system cannot be started.

      • If LIN communication is not available, the steering cannot be locked or unlocked.

      OK
      LIN communication system DTC B2785 and B2287 are not output simultaneously.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIN COMMUNICATION SYSTEM (Proceed to Diagnostic Trouble Code Chart) Click here

    OK

  2. READ VALUE USING GTS (STEERING UNLOCK SWITCH)


    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 / Power Source Control / Data List.

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


      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Steering Unlock Switch State of steering unlock sensor signal output from steering lock ECU (steering lock actuator assembly) OFF or ON

      OFF: Steering locked

      ON: Steering unlocked

      • When the shift lever is in P and the power switch is off, if any door is opened or closed, the steering is locked.

      • When the electrical key transmitter sub-assembly is in the cabin and the power switch is turned on (ACC) or on (IG), the steering unlocks.

      • The hybrid control system cannot be started when the steering unlock signal is off.

      Body Electrical > Power Source Control > Data List
      Tester Display
      Steering Unlock Switch
      Result
      Result Proceed to
      GTS display does not change A
      GTS display changes B

    B

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A01MSOUC16
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the K32 and K33 power management control ECU connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K32-1 (AM22) - Body ground Power switch off 11 to 14 V
      K33-7 (AM21) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  4. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the K32 and K33 power management control ECU connectors.

    2. A01MSOUC17
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K32-5 (E01) - Body ground Always Below 1 Ω
      K32-6 (E1) - Body ground Always Below 1 Ω
      K33-4 (E12) - Body ground Always Below 1 Ω
      K33-5 (E02) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. Reconnect the K32 and K33 power management control ECU connectors.

    2. A0022PGC43
      *a

      Component with harness connected

      (Steering Lock ECU (Steering Lock Actuator Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K28-4 (SLP1) - Body ground

      Positive (+) tester probe → K28-4 (SLP1)

      Negative (-) tester probe → Body ground

      		 Steering locked → unlocked* 10 kΩ or higher → Below 1 Ω

      Tech Tips


      • *: If any of the doors are opened with the shift lever in P and the power switch off, the steering will be locked. If the power switch is turned on (ACC) or on (IG) with the electrical key transmitter sub-assembly in the cabin, the steering will be unlocked.

      • DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator assembly) to the certification ECU (smart key ECU assembly) individually.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. Disconnect the K33 power management control ECU connector.

    2. Disconnect the K28 steering lock ECU (steering lock actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K33-12 (SLP) - K28-4 (SLP1) Always Below 1 Ω
      K33-12 (SLP) or K28-4 (SLP1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR