POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B26031C

DTC Code DTC Name
B26031C Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range

DESCRIPTION

Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should operate based on the voltage value.

DTC No. Detection Item DTC Detection Condition Trouble Area
B26031C Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range When operating the tilt and telescopic switch, an abnormal voltage value is sent to the multiplex tilt and telescopic ECU.

  • Tilt and telescopic switch

  • Harness or connector

  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

B004XK5E75

PROCEDURE


  1. READ VALUE USING GTS (TILT MANUAL SWITCH UP/DOWN, TELESCOPIC MANUAL SWITCH SHORT/LONG)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Check the tilt and telescopic switch.

    6. Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.


      Body Electrical > Tilt&Telescopic > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Tilt Manual Switch Up Input state of tilt up switch ON or OFF - -
      Tilt Manual Switch Down Input state of tilt down switch ON or OFF - -
      Telescopic Manual Switch Short Input state of telescopic contract switch ON or OFF - -
      Telescopic Manual Switch Long Input state of telescopic extend switch ON or OFF - -

      Body Electrical > Tilt&Telescopic > Data List
      Tester Display
      Tilt Manual Switch Up
      Tilt Manual Switch Down
      Telescopic Manual Switch Short
      Telescopic Manual Switch Long
      OK
      "ON" is displayed on the GTS screen when each switch is turned on.
      "OFF" is displayed on the GTS screen when each switch is turned off.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT AND TELESCOPIC SWITCH) Click here

    OK

  2. CONFIRM DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Tilt&Telescopic > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Tilt&Telescopic > Trouble Codes
      Result
      Result Proceed to
      DTCs are output. A
      DTCs are not output. B

    A

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT AND TELESCOPIC SWITCH)


    1. Disconnect the G21 multiplex tilt and telescopic ECU connector.

    2. Disconnect the G25 tilt and telescopic switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G21-5 (VC) - G25-1 (VC) Always Below 1 Ω
      G21-18 (MSW) - G25-3 (MSW) Always Below 1 Ω
      G21-5 (VC) or G25-1 (VC) - Body ground Always 10 kΩ or higher
      G21-18 (MSW) or G25-3 (MSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)


    1. B004RD0C85
      *a

      Component with harness connected

      (Multiplex Tilt and Telescopic ECU)

      Reconnect the G21 multiplex tilt and telescopic ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G21-5 (VC) - G21-18 (MSW) Power switch on (IG) 4.9 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    OK

  5. INSPECT TILT AND TELESCOPIC SWITCH


    1. Inspect the tilt and telescopic switch.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    NG

    REPLACE TILT AND TELESCOPIC SWITCH Click here