POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B2620

DTC Code DTC Name
B2620 ECU Power Source Circuit Malfunction

DESCRIPTION

The ECU power source circuit supplies positive voltage to the multiplex tilt and telescopic ECU.

DTC Code Detection Item Trouble Area
B2620 The voltage of the ECU power source drops to 8 V or less and this condition continues for 10 sec. or more.

  • D MPX-B 1 fuse

  • Harness or connector

  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

A000WLUE54
*1 from Auxiliary Battery
*2 Multiplex Tilt and Telescopic ECU

PROCEDURE


  1. INSPECT FUSE (D MPX-B 1)


    1. Remove the D MPX-B 1 fuse from the main body ECU.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D MPX-B 1 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY)


    1. A000ZKIE04
      *1 Rear view of wire harness connector: (to Multiplex Tilt and Telescopic ECU)

      Disconnect the L34 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
      L34-9 (ECUB) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A000XIJE06
      *1 Rear view of wire harness connector: (to Multiplex Tilt and Telescopic ECU)

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L34-11 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR