STEERING LOCK SYSTEM, Diagnostic DTC:B2782

DTC Code DTC Name
B2782 Power Source Control ECU Malfunction

DESCRIPTION


The diagnosis information of the steering lock ECU (steering lock actuator assembly) is transmitted to the intelligent tester via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
B2782

Steering lock motor drive control circuit is defective.

IGE power supply circuit malfunction

  • Steering lock ECU (Steering lock actuator assembly)

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

A01NGZME06

INSPECTION PROCEDURE

Note


  • If the steering lock ECU (steering lock actuator assembly) is replaced, with the power switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start.

  • After replacing the steering lock ECU (steering lock actuator assembly), registration must be performed refer to the Service Bulletin for the registration method.

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. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. A01NF9ZE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Lock ECU)

      Disconnect the F37 steering lock ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F37-1 (GND) - Body ground Always Below 1 Ω
    3. A01NDLDE06
      Text in Illustration
      *1

      Component with harness connected

      (Steering Lock ECU)

      Reconnect the F37 steering lock ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F37-3 (IGE) - F37-1 (GND)

      Specified condition is checked after performing the following:


      1. Turn the power switch off

      2. Turn the power switch on (ACC or IG)

      • Motor activated: Below 1 V

      • Motor not activated: 10 to 12 V
      F37-3 (IGE) - F37-1 (GND)

      Specified condition is checked after performing the following:


      1. Move the shift lever to P

      2. Turn the power switch off

      3. Open the driver door

      • Motor activated: Below 1 V

      • Motor not activated: 10 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 - POWER MANAGEMENT CONTROL ECU AND BODY GROUND) Click here

    OK

  2. CLEAR DTC


    1. Clear the DTC Click here.

    2. Disconnect and reconnect the cable to the negative (-) battery terminal to clear the malfunction history of Power Supply Open.


    NEXT

  3. READ VALUE USING INTELLIGENT TESTER (POWER SUPPLY OPEN)


    1. Check for DTCs Click here.

    2. Use the Data List to check if the steering lock control is functioning properly.

      Entry & Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Open

      Open in ECU record/

      NG (Past) or OK

      NG (Past): Open in ECU

      OK: No malfunction

      		 -
      Result
      Result Proceed to

      • B2782 is not output.

      • "OK" is displayed on the intelligent tester.

      		 A

      • B2782 is output.

      • "NG (Past)" is displayed on the intelligent tester.

      		 B

    B

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

    A

    USE SIMULATION METHOD TO CHECK Click here

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


    1. Disconnect the F98 power management control ECU connector.

      A01NGSAE01

    2. Disconnect the F37 steering lock ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F37-3 (IGE) - F98-6 (SLR+) Always Below 1 Ω
      F37-3 (IGE) or F98-6 (SLR+) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2

      Front view of wire harness connector

      (to Steering Lock ECU)
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR