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PRE-COLLISION SYSTEM ECU Power Source Circuit

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DTC Code DTC Name
  ECU Power Source Circuit
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DESCRIPTION

This circuit supplies power to the millimeter wave radar sensor assembly when the ignition switch is ON.

Table 1. *a from IG1-NO. 1 Relay *b ECU-IG1 NO. 3 *c Millimeter Wave Radar Sensor Assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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PROCEDURE


  1. Click here

    CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY (B VOLTAGE)


    1. B006Z8JC03
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the A30 millimeter wave radar sensor assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A30-8 (IGB) - Body ground Ignition switch ON 11 to 14 V

    4. Turn the ignition switch off.

    5. Connect the A30 millimeter wave radar sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

  2. Click here

    CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)


    1. B006Z8JC04
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the A30 millimeter wave radar sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A30-1 (SGND) - Body ground Always Below 1 Ω

    3. Connect the A30 millimeter wave radar sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR