DYNAMIC RADAR CRUISE CONTROL SYSTEM ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the driving support ECU.

WIRING DIAGRAM

A000TBGE20
*1 from D-IG1-1 Relay
*2 Driving Support ECU

PROCEDURE


  1. CHECK FUSE (D-IG1-2)


    1. Remove the D-IG1-2 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-IG1-2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND)

    A000YPLE03
    *1 Front view of wire harness connector: (to Driving Support ECU)

    1. Disconnect the A33 ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A33-13 (B) - Body ground Power switch ON (IG) 11 to 14 V
      A33-13 (B) - Body ground Power switch OFF Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A33-25 (GND) - Body ground Always Below 1 Ω

    OK

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR