ENTRY AND START SYSTEM(for Start Function), 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 actuator assembly (steering lock ECU) via direct line and the steering lock position signal sent via LIN communication do not match.

Tech Tips

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

DTC No. DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2285 The steering lock position signal sent by the steering lock ECU via direct line and the steering lock position signal sent via LIN communication (1-trip detection logic*) do not match.

  • AM2 No. 2 fuse

  • Steering lock actuator assembly (steering lock ECU)

  • Certification ECU (smart key ECU assembly)

  • Wire harness or connector

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

*: Only output while a malfunction is present and the engine switch is on (IG)

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The engine cannot be started. An engine start command is not output.
Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2285

    Power Source Control

  • Steering Unlock Switch


    Entry & Start

  • Power Supply Short

  • Lock Bar Stuck Error

  • Motor Driver Short

 -

WIRING DIAGRAM

A004KIME09

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

  • 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.

  • Before replacing the certification ECU (smart key ECU assembly) or steering lock actuator assembly (steering lock ECU), refer to the entry and start system (for Entry Function) Click here.

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

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

Tech Tips

If the entry key indicator in the combination meter assembly illuminates in green, the steering lock bar may be stuck.

PROCEDURE


  1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM)


    1. Clear the DTCs Click here.

      OK
      LIN communication system DTC B2785 is not output simultaneously.

      Tech Tips


      • If the steering wheel cannot be locked or unlocked, the engine switch cannot be turned on (IG) and the engine cannot be started.

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


    NG

    GO TO LIN COMMUNICATION SYSTEM Click here

    OK

  2. READ VALUE USING GTS (STEERING UNLOCK SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Steering Unlock Switch State of steering unlock sensor signal output from steering lock actuator assembly/OFF or ON

      OFF: Steering locked

      ON: Steering unlocked

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

      • When the electrical key transmitter sub-assembly is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.

      • The engine cannot be started when the steering unlock signal is off.

      • *: for Automatic Transmission

      Result
      Result Proceed to
      Data List item does not change A
      Data List item changes (for LHD) B

    B

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

    A

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A004IP3E01
    Text in Illustration
    *a

    Rear view of harness connected

    (to Certification ECU (Smart Key ECU Assembly))

    1. Disconnect the D48 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D48-2 (+B) - Body ground Always 9.5 to 16 V

    NG

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

    OK

  4. CHECK HARNESS AND CONNECTOR (GROUND)

    A004KBGE01
    Text in Illustration
    *a

    Rear view of harness connected

    (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D48-11 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Reconnect the D59 steering lock actuator assembly (steering lock ECU) connector.

    2. A004JV5E01
      Text in Illustration
      *a

      Component with harness connected

      (Steering Lock Actuator Assembly (Steering Lock ECU))

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      Positive (+) tester probe → D59-4 (SLP)

      Negative (-) tester probe → Body ground

      		 Steering locked* 10 kΩ or higher

      Positive (+) tester probe → D59-4 (SLP)

      Negative (-) tester probe → Body ground

      		 Steering unlocked* Below 1 Ω

      Tech Tips


      • *: If any of the doors are opened then closed with the shift lever in P* and the engine switch off, the steering wheel will be locked. If the engine switch is then turned on (ACC) or on (IG), the steering wheel 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.


      • *: for Automatic Transmission


    NG

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

    OK

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU))


    1. Disconnect the D41 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the D59 steering lock actuator assembly (steering lock ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D41-26 (SLP) - D59-4 (SLP1) Always Below 1 Ω
      D41-26 (SLP) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR