STEERING LOCK SYSTEM, Diagnostic DTC:B2782

DTC Code DTC Name
B2782 Power Source Control ECU Malfunction

DESCRIPTION

The steering lock ECU activates the steering lock motor by the power from the main body ECU through the IGE circuit. This prevents the steering from being locked while the vehicle is moving.

The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU as the steering lock ECU is not connected to the CAN communication system.

DTC Code Detection Condition Trouble Area
B2782 IGE power supply circuit malfunction

  • Steering lock actuator assembly (steering lock ECU)

  • Main body ECU

  • Wire harness or connector

WIRING DIAGRAM

A01GW5HE01

INSPECTION PROCEDURE

Tech Tips

When the power switch is OFF, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU:

With the power switch OFF, open the driver door. Then (with the power switch still OFF) open and close any door several times at 1.5 second intervals.

PROCEDURE


  1. CHECK DTC OUTPUT (B2785)


    1. Check the DTCs.

      OK
      DTC B2782 is output, but DTC B2785 is not output.

    NG

    GO TO LIN COMMUNICATION SYSTEM (B2785) Click here

    OK

  2. INSPECT STEERING LOCK ECU

    A01GXW3E04

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      L33-3 (IGE) - L33-1 (GND)

      • Power switch ON (IG)

      • Steering lock motor is operating

      		 Below 1 V
      L33-3 (IGE) - L33-1 (GND)

      • Power switch ON (IG)

      • Steering lock motor is not operating

      		 11 to 14 V

      Tech Tips

      When the steering lock is activated and the power switch is turned ON (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds.


    NG

    CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU AND BODY GROUND) Click here

    OK

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

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

    A01GWWKE10

    1. Disconnect the L33 steering lock ECU connector.

    2. Disconnect the L13 main body ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L33-3 (IGE) - L13-19 (SLR+) Always Below 1 Ω
      L33-1 (GND) - Body ground Always Below 1 Ω
      L33-3 (IGE) or L13-19 (SLR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU