STEERING LOCK SYSTEM, Diagnostic DTC:B2782

DTC Code DTC Name
B2782 Power Source Control ECU Malfunction

DESCRIPTION

The certification ECU (smart key ECU assembly) has a power source mode switching function.

This DTC is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the certification ECU (smart key ECU assembly) to the steering lock actuator assembly (steering lock ECU) is determined to be abnormal.

Tech Tips

The steering lock actuator assembly (steering lock ECU) is not connected to the CAN communication system. However, the steering lock actuator assembly (steering lock ECU) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).

DTC No. Detection Condition Trouble Area DTC Output Confirmation Operation
B2782

Either condition is met (1-trip detection logic*):


  • The steering lock motor activation command circuit has a short circuit.

  • The steering lock motor activation command circuit has an open circuit.

Tech Tips

If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.

  • Steering lock actuator assembly (steering lock ECU)

  • Certification ECU (Smart key ECU assembly)

  • Harness or connector

 Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on [ACC] or on [IG] while carrying the key.)

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The steering cannot be locked or unlocked. For this reason, the engine cannot be started. Prohibits the engine from being started (the engine does not crank).

WIRING DIAGRAM

A005LGIE32
*a Steering Lock Motor
*b CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
*c STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

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 steering lock system uses LIN communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting.

  • When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected Click here.

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

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

Tech Tips

Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2782

    Entry&Start

  • Power Supply Short

 -

PROCEDURE


  1. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. Disconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F61-1 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

    4. A005K3PE01
      Text in Illustration
      *a

      Component with harness connected

      (Steering lock actuator assembly (Steering lock ECU))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F61-3 (IGE) - F61-1 (GND)

      When all of the following conditions are met:


      • Steering lock unlocked

      • Engine switch off

      • Shift lever in P*1 or N*2

      • Driver side door close to open

      • Motor activated: Below 1 V

      • Motor not activated: 11 to 14 V

      *1: for CVT

      *2: for Multi-mode Manual Transaxle

      Tech Tips

      When the steering lock is activated and the engine 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 (CERTIFICATION ECU (SMART KEY ECU) - STEERING LOCK ECU (STEERING LOCK ECU)) Click here

    OK

  2. CLEAR DTC AND DATA LIST MALFUNCTION RECORD


    1. Clear the DTCs Click here.

    2. Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored.


    NEXT

  3. CHECK DTC


    1. Check if DTC B2782 is output Click here.

      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.

      		 for LHD B
      for RHD C

    A

    SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)

    B

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

    C

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

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU) - STEERING LOCK ECU (STEERING LOCK ECU))


    1. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

    3. Check for deformation and corrosion of the connector case and terminals.

      OK
      There is no deformation or corrosion of the connector case or terminals.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F63-29 (SLR+) - F61-3 (IGE) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F63-29 (SLR+) or F61-3 (IGE) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR