LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE7

DTC Code DTC Name
C1AE7 Rear Left Center Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
C1AE7 A malfunction of the No. 1 ultrasonic sensor (rear center sensor LH).

  • No. 1 ultrasonic sensor (rear center sensor LH)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

A01FU54E22

INSPECTION PROCEDURE

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.

PROCEDURE


  1. INSPECT NO. 1 ULTRASONIC SENSOR (REAR CENTER SENSOR LH)


    1. Remove the No. 1 ultrasonic sensor (rear center sensor LH) Click here.

    2. Inspect the No. 1 ultrasonic sensor (rear center sensor LH) Click here.


    NG

    REPLACE NO. 1 ULTRASONIC SENSOR (REAR CENTER SENSOR LH) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR (REAR CENTER SENSOR LH) - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the b6 No. 1 ultrasonic sensor (rear center sensor LH) connector.

    2. Disconnect the N10 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
      b6-2 (S) - N10-8 (S4) Always Below 1 Ω
      b6-1 (E) - N10-9 (E4) Always Below 1 Ω
      b6-2 (S) - Body ground Always 10 kΩ or higher
      b6-1 (E) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here