ENTRY AND START SYSTEM, Diagnostic DTC:B2285, B2288

DTC Code DTC Name
B2285 Steering Lock Position Signal Circuit Malfunction
B2288 Steering Lock Signal Circuit Malfunction

DESCRIPTION

The main body ECU and the steering lock ECU are connected by a cable and the LIN communication line. These DTCs are output when: 1) signals, transmitted through the cable and the communication line, do not match; or 2) a malfunction is detected in the circuit between the main body ECU and the steering lock ECU.

DTC Code Detection Condition Trouble Area
B2285 Cable and LIN information between main body ECU and steering lock ECU are inconsistent

  • Main body ECU


  • Steering lock actuator assembly (steering lock ECU)


  • Harness or connector
B2288 After turning power switch from OFF to ON (IG), steering wheel does not unlock for certain period of time (ECU unlocks steering wheel only when it receives unlock signal from LIN communication and cable)

  • Main body ECU


  • Steering lock actuator assembly (steering lock ECU)


  • Harness or connector

WIRING DIAGRAM

A000TKJE01
*a LIN Line
*b Main Body ECU (Driver Side Junction Block Assembly)
*c Steering Lock Actuator Assembly (Steering Lock ECU)

PROCEDURE


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


    1. Use the Data List to check if the steering lock condition is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Steering Unlock Switch Steering lock condition / ON or OFF

      ON: Steering is unlocked

      OFF: Steering is locked

      		 -
      Result
      Result Proceed to
      Display on tester does not change according to steering lock position A
      Display on tester changes according to steering lock position B

    B

    REPLACE MAIN BODY ECU

    A

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)

    A000VALE03
    *1 Front view of wire harness connector: (to Main Body ECU)
    *2 Front view of wire harness connector: (to Steering Lock ECU)

    1. Disconnect the L13 main body ECU connector.

    2. Disconnect the L33 steering lock ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L13-18 (SLP) - L33-4 (SLP1) Always Below 1 Ω
      L13-18 (SLP) or L33-4 (SLP1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE MAIN BODY ECU


    1. Temporarily replace the main body ECU with a new or normally functioning one.

    2. Check whether DTC B2285 and B2288 recur.

      OK
      No DTC is output.

    OK

    END (MAIN BODY ECU IS FAULTY)

    NG

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