POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B2602, B2606

DTC Code DTC Name
B2602 Key Unlock Warning Switch Circuit Malfunction
B2606 Key Code Confirm Signal Malfunction

DESCRIPTION

A key code confirmation signal (ON or OFF) is sent from the main body ECU to the multiplex tilt and telescopic ECU via the communication bus.

The multiplex tilt and telescopic ECU uses this signal to operate the auto away/return function.

DTC Code Detection Condition Trouble Area
B2602

Both of the following conditions continue:


  • The key code confirmation signal is off.


  • The engine switch is on (IG).

  • CAN communication system

  • Entry and start system (for start function)

  • Multiplex tilt and telescopic ECU
B2606 IG signals and/or key code confirmation signals are not received correctly.

  • CAN communication system

  • Entry and start system (for start function)

  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

A01EQWTE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTC OUTPUT

    Tech Tips

    The power tilt and power telescopic steering column system uses the CAN communication system, so check its diagnostic system before proceeding to troubleshooting.


    1. Check if DTC B2621 is output.

      Result
      Result Proceed to
      B2621 is not output A
      B2621 is output B

      Tech Tips


      • If DTC B2621 is output, perform troubleshooting for B2621 first.

      • DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column system.


    B

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (COMMUNICATION STATE OF ENGINE SWITCH AND KEY CODE)


    1. Use the Data List to check if the communication of the key code and the engine switch are functioning properly.

      Tilt & Telescopic
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG Switch (CAN) Communication state of engine switch/ON or OFF

      ON: Communication normal

      OFF: Communication interrupted

      		 -
      Key Code Confirm (CAN) Communication state of key code confirmation signal/ON or OFF

      ON: Communication normal

      OFF: Communication interrupted

      		 -
      OK
      "ON" is displayed.

    NG

    GO TO ENTRY AND START SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2602 and/or B2606 is not output.

    NG

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here