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 ECU (steering lock actuator assembly) via direct line and the steering lock position signal sent via LIN communication do not match.

Tip:

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

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 (1-trip detection logic*) do not match.

  • AM2 fuse

  • Steering lock ECU (Steering lock actuator assembly)

  • Certification ECU (smart key ECU assembly)

  • Wire harness or connector

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

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

Table 1. 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.

The ECU does not send an engine start request.
Table 2. Related Data List and Active Test Items

DTC

Data List Item

Active Test Item

B2285

  • Power Source Control:

  • Steering Unlock Switch

  • Entry&Start:

  • Power Supply Short

  • Motor Driver Short

  • Lock Bar Stuck Error

-

WIRING DIAGRAM

C279147E01

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 (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click hereClick here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

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

    Click hereClick here

  • Inspect the fuses of 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.

PROCEDURE

  1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

    1. Check for DTCs.

      Body Electrical > Entry&Start > Trouble Codes

      Tip:

      • 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.

      OK

      LIN communication system DTC B2785 is not output simultaneously.

      Result

      Proceed to

      OK

      NG
    NG

    GO TO DTC B2785

    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.

      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 actuator assembly

      ON or OFF

      ON: Steering unlocked

      OFF: Steering locked

      • When the shift lever is in P*1 or N*2 and the engine switch is off, if any door is opened or closed, the steering is locked.

      • When the key 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.

      • *1: except Manual Transaxle

      • *2: for Manual Transaxle

      Body Electrical > Power Source Control > Data List

      Tester Display

      Steering Unlock Switch

      Result

      Proceed to

      Data List item does not change

      Data List item changes
    Data List item changes

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here

    Data List item does not change

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    1. B268625C36

      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the G82 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

      G82-2 (+B) - Body ground

      Always

      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)

    1. B268625C38

      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the G82 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G82-11 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. C197722C40

      *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

      Positive (+) tester probe → G5-4 (SLP1) Negative (-) tester probe → Body ground

      Steering locked*

      10 kΩ or higher

      Steering unlocked*

      Below 1 Ω
      Tip:

      • *: 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.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here

    OK

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

    1. Disconnect the G84 connector from the certification ECU (smart key ECU assembly).

    2. Disconnect the G5 connector from the steering lock ECU (steering lock actuator assembly).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G84-26 (SLP) - G5-4 (SLP1)

      Always

      Below 1 Ω

      G84-26 (SLP) or G5-4 (SLP1) - Body ground

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR