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LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE1

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DTC Code DTC Name
C1AE1 Front Left Sensor Malfunction
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DESCRIPTION

The No. 1 ultrasonic sensor (front left sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front left sensor). If the No. 1 ultrasonic sensor (front left sensor) has an open circuit or other malfunction, it will not function normally.

DTC No. DTC Detection Condition Trouble Area
C1AE1 A malfunction of the No. 1 ultrasonic sensor (front left sensor).

  • No. 1 ultrasonic sensor (front left sensor)

  • Harness or connector

  • Clearance warning ECU assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

If DTCs are output after repairs, turn the power switch on (IG) and turn the clearance sonar main switch on. Then clear the DTCs (Click here).

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PROCEDURE


  1. Click here

    INSPECT NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR)


    1. Remove the No. 1 ultrasonic sensor (front left sensor) (Click here).

    2. A0005XIE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (S) - 1 (E) Always 20 to 40 kΩ
      Table 1. Text in Illustration
      *a

      Component without harness connected

      (No. 1 Ultrasonic Sensor (Front Left Sensor))

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    CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the C1 No. 1 ultrasonic sensor (front left sensor) connector.

    2. Disconnect the H61 clearance warning ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C1-2 (S) - H61-21 (S6) Always Below 1 Ω
      C1-1 (E) - H61-22 (E6) Always Below 1 Ω
      C1-2 (S) - Body ground Always 10 kΩ or higher
      C1-1 (E) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    • A

      REPAIR OR REPLACE HARNESS OR CONNECTOR

    • B

      REPLACE CLEARANCE WARNING ECU ASSEMBLY (Click here)

    • C

      REPLACE CLEARANCE WARNING ECU ASSEMBLY (Click here)