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 power source control ECU assembly 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 No. Detection Item Trouble Area
B2602

Both of the following conditions continue:


  • A key code confirmation signal is off


  • The engine switch is on (IG)

  • Multiplex 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.

  • Multiplex communication system

  • Entry and start system (for Start function)

  • Multiplex tilt and telescopic ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTC OUTPUT

    Tech Tips

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


    1. Check if DTC B2621 is output.

      Result
      Result Proceed to
      No output A
      B2621 is output B

      Tech Tips


      • If DTC B2621 besides B2602 and B2606 are 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


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

    5. Check the communication state of the intelligent tester. Enter the following menus: Chassis / Tilt&Telescopic / Data List.

      Tilt&Telescopic
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Key Code Confirm(MPX)

      Communication state of key code confirmation signal/

      ON or OFF

      ON: Communication is normal

      OFF: Communication is interrupted

      		 -
      IG Switch (MPX)

      Communication state of engine switch/

      ON or OFF

      ON: Communication is normal

      OFF: Communication is interrupted

      		 -
      OK
      "ON" is displayed.

    NG

    CHECK ENTRY AND START SYSTEM (for Start Function) Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTC 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

    END