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DYNAMIC RADAR CRUISE CONTROL SYSTEM ECU Power Source Circuit

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DTC Code DTC Name
  ECU Power Source Circuit
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DESCRIPTION

This circuit provides power to operate the driving support ECU assembly. The driving support ECU assembly determines information about the vehicle in front based on data from the radar sensor, and then decides how much acceleration and/or deceleration is needed to maintain the set distance. The driving support ECU assembly also requests the skid control ECU to apply brakes and sounds the pre-crash safety city buzzer.

Table 1. *1 from IG Circuit *2 ECU-IG NO. 6 *3 Driving Support ECU 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 DRIVING SUPPORT ECU ASSEMBLY (B VOLTAGE)


    1. A01X7XYE02

      Disconnect the E164 driving support ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E164-7 (B) - Body ground Engine switch on (IG) 11 to 14 V
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Driving Support ECU Assembly)

    • OKClick here
    • NG

      REPAIR OR REPLACE POWER SOURCE CIRCUIT

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    CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BODY GROUND)


    1. Disconnect the E164 driving support ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E164-28 (GND) - Body ground Always Below 1 Ω

    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR