LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE7

DTC Code DTC Name
C1AE7 Rear Left Center Sensor Malfunction

DESCRIPTION

The rear center ultrasonic sensor (rear left center sensor) is installed on the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear center ultrasonic sensor (rear left center sensor). If the rear center ultrasonic sensor (rear left center sensor) has an open circuit or other malfunction, it will not function normally.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AE7 Rear Left Center Sensor Malfunction A malfunction of the rear center ultrasonic sensor (rear left center sensor).

  • Rear center ultrasonic sensor (rear left center sensor)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

B000RYEE21

CAUTION / NOTICE / HINT

Note

If DTCs are output after repairs, turn the power switch on (IG) and the LEXUS parking assist-sensor system on. Then clear the DTCs.

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PROCEDURE


  1. INSPECT REAR CENTER ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)


    1. Remove the rear center ultrasonic sensor (rear left center sensor).

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    2. Inspect the rear center ultrasonic sensor (rear left center sensor).

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      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR CENTER ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR [REAR LEFT CENTER SENSOR] - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the c4 rear center ultrasonic sensor (rear left center sensor) connector.

    2. Disconnect the X12 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
      c4-2 (S) - X12-8 (S4) Always Below 1 Ω
      c4-1 (E) - X12-9 (E4) Always Below 1 Ω
      c4-2 (S) - Body ground Always 10 kΩ or higher
      c4-1 (E) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR