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 a mismatch between the steering lock position signal from the direct line sent by the steering lock ECU and the steering lock position signal sent via LIN communication is detected.

Note:

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click hereClick hereClick here).

  • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click hereClick hereClick hereClick here).

Tip:

  • 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 changes to on (IG).

  • 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.

Detection Item

DTC Detection Condition

Trouble Area

B2285

Steering Lock Position Signal Circuit Malfunction

Mismatch between the steering lock position signal from the direct line sent by the steering lock ECU and the steering lock position signal sent via LIN communication (1-trip detection logic*).

  • AM2 fuse

  • Steering lock actuator assembly (steering lock ECU)

  • Power management control ECU

  • LIN communication system

  • Harness or connector

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

DTC No.

DTC Output Confirmation Operation

B2285

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.
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.

An engine start command is not output.

WIRING DIAGRAM

A207422E13

CAUTION / NOTICE / HINT

Note:

  • When using the intelligent tester with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle and select "MANUAL" from the initial screen on the intelligent tester, and then select "KEY REGIST" under Model Code.

  • 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).

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

  • Before replacing the steering lock actuator assembly (steering lock ECU), refer to the Service Bulletin.

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

Tip:
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

  • IG2 Status

  • IG(Lin)

  • Power Supply Short

  • Power Supply Open

  • Lock Bar Stuck Error

  • Motor Driver Short

  • Motor Driver Open

-
Tip:

If the engine switch indicator is blinking in green, the steering lock bar may be stuck.

PROCEDURE

  1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

    1. Check for DTCs.

      Click here

      OK

      LIN communication system DTC B2287 is not output simultaneously.

      Tip:

      • If the lock and unlock functions of the steering lock do not operate, the engine switch cannot be turned on (IG) and the engine cannot be started.

      • If LIN communication does not function, the steering cannot be locked or unlocked.

      Body Electrical > Power Source Control > Trouble Codes

      Result

      Result

      OK

      NG
    NG

    GO TO DTC B2287

    Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (STEERING UNLOCK SWITCH)

    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.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Steering Unlock Switch

      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*1

      OFF: Steering locked*2

      • 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 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.
      Tip:

      • If the engine switch cannot be turned on (IG), proceed to the next step.

      • *1: When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.

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

      Result

      Result

      Proceed to

      Data List item does not change

      A

      Data List item changes

      B
    B

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

    A

  3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

    1. Disconnect the G39 power management control ECU connector.

    2. A207890C01

      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G39-2 (AM21) - Body ground

      Always

      9.5 to 14 V

      G39-1 (AM22) - Body ground

      Result

      Result

      OK

      NG
    NG

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

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

    1. A207890C02

      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the G39 power management control ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G39-6 (GND) - Body ground

      Always

      Below 1 Ω

      G39-5 (GND2) - Body ground

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. C197722C02

      *a

      Component with harness connected

      (Steering Lock ECU)

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

      Tip:

      DTC P2285 may be stored due to an internal malfunction in the steering lock actuator. Lock and unlock position signals are sent separately to the power management control ECU from the steering lock actuator assembly to identify the steering lock position.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Positive (+) tester probe → G23-4 (SLP1)

      Negative (-) tester probe → Body ground

      Steering locked*1

      10 kΩ or higher

      Positive (+) tester probe → G23-4 (SLP1)

      Negative (-) tester probe → Body ground

      Steering unlocked*2

      Below 1 Ω
      Tip:

      • *1: When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.

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

      • With the connector connected to the ECU, measure the resistance from the rear of the connector.

      Result

      Result

      OK

      NG
    NG

    REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

    Click here

    OK

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

    1. Disconnect the G39 power management control ECU connector.

    2. Disconnect the G23 steering lock ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G39-3 (SLP) - G23-4 (SLP1)

      Always

      Below 1 Ω

      G39-3 (SLP) or G23-4 (SLP1) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE POWER MANAGEMENT CONTROL ECU

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR