POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM IG Power Source Circuit

DESCRIPTION

When the power switch is turned ON (IG), the IG power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU.

The multiplex tilt and telescopic ECU also receives power switch signals via this circuit.

WIRING DIAGRAM

A000X7BE03
*a from Auxiliary Battery
*b Main Body ECU (Driver Side Junction Block Assembly)
*c Multiplex Tilt and Telescopic ECU

PROCEDURE


  1. INSPECT FUSE (D-IG1-1)


    1. Remove the D-IG1-1 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-IG1-1 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK MULTIPLEX TILT AND TELESCOPIC ECU (IG TERMINAL VOLTAGE)


    1. A000YVBE04
      *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 Switch Condition Specified Condition
      L34-8 (IG) - L34-11 (GND) Power switch ON (IG) 11 to 14 V
      Result
      Result Proceed to
      Voltage value is outside the standard. A
      Voltage value is within the standard. B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

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

    A000TQXE03
    *1 Rear view of wire harness connector: (to Multiplex Tilt and Telescopic ECU)
    *2 Front view of wire harness connector: (to Main Body ECU)

    1. Disconnect the L34 multiplex tilt and telescopic ECU connector.

    2. Disconnect the DA main body ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L34-8 (IG) - DA-21 Always Below 1 Ω
      L34-8 (IG) - Body ground Always 10 kΩ or higher
      L34-11 (GND) - Body ground Always Below 1 Ω

    OK

    GO TO ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR