POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B2624

DTC Code DTC Name
B2624 Vehicles Speed Malfunction

DESCRIPTION

The multiplex tilt and telescopic ECU forms a network with the ECUs of other systems through the CAN communication bus. Each ECU informs the other ECUs that it is connected to the network by outputting a specified signal (periodic signal) onto the communication bus on a regular basis. The multiplex tilt and telescopic ECU receives vehicle speed signals from the combination meter via the CAN communication bus to prevent improper operation of the auto away/return function during driving.

DTC No. Detection Item Trouble Area
B2624

  • The auto away function is disabled with the last vehicle speed signal* of 10 km/h (6 mph) or more.

  • Vehicle speed signal is lost for 5 seconds or more and the auto away/return function is disabled.

  • CAN communication system

  • Combination meter

  • Multiplex tilt and telescopic ECU

Tech Tips

*: If the power switch is turned off immediately after the vehicle comes to a sudden stop, the last vehicle speed signal may not be 0 km/h (0 mph).

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Check if DTC B2621 is output Click here.

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

      Tech Tips

      DTC B2621 indicates a combination meter communication stop malfunction in the CAN communication system.


    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (FREEZE SPEED INFO)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the intelligent tester on.

    5. Check the vehicle speed signal on the intelligent tester. Enter the following menus: Chassis / Tilt & Telescopic / Data List.

      Tilt & Telescopic
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Freeze Speed Info

      Vehicle speed data/

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Stop → Drive → Stop 0 km/h (0 mph) → Same speed as indicated on speedometer → 0 km/h (0 mph)
      Result
      Result Proceed to
      Intelligent tester indication is normal. A
      Intelligent tester indication is abnormal. (for LHD) B
      Intelligent tester indication is abnormal. (for RHD) C

      Tech Tips

      Vehicle speed of 3 km/h (2 mph) or more may be displayed on the intelligent tester immediately after the vehicle comes to a sudden stop. This is caused by a delay in vehicle signal input via the CAN communication bus and is not a malfunction.


    B

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    C

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    A

    GO TO METER / GAUGE SYSTEM Click here