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SMART ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2285

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DTC Code DTC Name
B2285 Steering Lock Position Signal Circuit Malfunction
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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 (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2285 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)

  • Power management control ECU

  • Wire harness or connector

 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 wheel locked), then turn the power switch on (ACC) (with the 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 hybrid control system cannot be started. The ECU does not send an hybrid control system start request.
Table 2. *a from Auxiliary Battery *b Steering Lock ECU (Steering Lock Actuator Assembly) *c Power Management Control ECU *d LIN Communication Line
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle 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 the 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 smart 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 here). Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

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

Tip:
Table 3. Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2285
  • Power Source Control

  • Steering Unlock Switch


  • Smart Key

  • Power Supply Short

  • Motor Driver Short

  • Lock Bar Stuck Error

 -
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PROCEDURE


  1. Click here

    CHECK FOR DTC (LIN COMMUNICATION SYSTEM)


    1. Check for DTCs (Click here).

      OK
      LIN communication system DTC B2785 is not output simultaneously.
      Tip:

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

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


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    READ VALUE USING GTS


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

      Table 4. 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/ON or OFF

      ON: Steering unlocked

      OFF: Steering locked

      • 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 inside the vehicle 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.
      Result
      Result Proceed to
      Data List item does not change A
      Data List item changes B

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    CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. Disconnect the H1 and H2 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
      H1-1 (AM22) - Body ground Power switch off 11 to 14 V
      H2-7 (AM21) - Body ground Power switch off 11 to 14 V
      Table 5. Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

    • OKClick here
    • NG

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

  4. Click here

    CHECK HARNESS AND CONNECTOR (GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-5 (E01) - Body ground Always Below 1 Ω
      H1-6 (E1) - Body ground Always Below 1 Ω
      H2-4 (E12) - Body ground Always Below 1 Ω
      H2-5 (E02) - Body ground Always Below 1 Ω
      Table 6. Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. A0009P8E03

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      Positive (+) tester probe → H18-4 (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 power switch off, the steering wheel will be locked. If the power 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 power management control ECU individually.

      Table 7. Text in Illustration
      *a

      Component with harness connected

      (Steering Lock ECU (Steering Lock Actuator Assembly))

  6. Click here

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


    1. Disconnect the H2 power management control ECU connector.

    2. Disconnect the H18 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
      H2-16 (SLP) - H18-4 (SLP1) Always Below 1 Ω
      H2-16 (SLP) or H18-4 (SLP1) - Body ground Always 10 kΩ or higher

    • OK

      REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR