Lexus ES manuals

Lexus ES: Rr Sensor Initialization Incomplete (C1AF4)

DESCRIPTION

When it is judged that the rear sensors have not been initialized, the clearance warning ECU assembly stores DTC C1AF4.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AF4

Rr Sensor Initialization Incomplete

Rear sensor not initialized

  • Initialize rear sensor
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • If DTC C1AF4 is output after performing repairs, turn the power switch on (IG) and turn the parking support alert system on to clear the DTC.

    Click here

  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

    Click here

PROCEDURE

1.

INITIALIZE REAR CENTER ULTRASONIC SENSOR AND REAR CORNER ULTRASONIC SENSOR

(a) Initialize the rear center ultrasonic sensor and rear corner ultrasonic sensor.

  • w/o Parking Support Brake System: Click here
  • w/ Parking Support Brake System: Click here
NEXT

2.

CHECK FOR DTC

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

HINT:

After turning the power switch from off to on (IG), wait 10 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Proceed to

DTC C1AF4 is output

A

DTC C1AF4 is not output

B

HINT:

if DTC C1AF4 is still output after initializing the rear center ultrasonic sensor and rear corner ultrasonic sensor 3 times, replace the clearance warning ECU assembly.

A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

END (REAR SENSORS WERE NOT INITIALIZED)

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 Calibration

CALIBRATION NOTICE: When any of the following parts have been replaced, perform adjustment shown in the following table. If not, the parking support alert system may not operate correctly. ADJUST PARK

SEE MORE:

 Installation

INSTALLATION PROCEDURE 1. INSTALL FRONT ENGINE MOUNTING INSULATOR (a) Install the stay to the front engine mounting insulator with the nut. Torque: 6.0 N·m {61 kgf·cm, 53 in·lbf} (b) Install the front engine mounting insulator to the front frame assembly with the 3 nuts. Torque: 72 N·m {734 kg

 Removal

REMOVAL PROCEDURE 1. REMOVE LUGGAGE COMPARTMENT FLOOR MAT Click here 2. REMOVE SPARE WHEEL COVER TRAY Click here 3. REMOVE REAR FLOOR FINISH PLATE Click here 4. REMOVE LUGGAGE COMPARTMENT DOOR WEATHERSTRIP (a) Remove the luggage compartment door weatherstrip.

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