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

DESCRIPTION

When the engine 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 engine switch signals via this circuit.

WIRING DIAGRAM

A001A2RE07
*a from Battery
*b Main Body ECU
*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 of the fuse.

      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. A001A6CE03
      *1 Rear view of wire harness connector: (to Multiplex Tilt and Telescopic ECU)

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

    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) Engine switch on (IG) 11 to 14 V

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

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


    1. A0019ACE05
      *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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU)


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

      A001FYZE01
      *1 Component with harness connected: (Main Body ECU)
      Standard voltage
      Tester Connection Switch Condition Specified Condition
      DA-21 - Body ground Engine switch on (IG) 11 to 14 V

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - BATTERY)