Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Steering Angle Midpoint Initial Setting Incomplete (C1AEA)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Intelligent Clearance Sonar System / Steering Angle Midpoint Initial Setting Incomplete (C1AEA)

DESCRIPTION

When the clearance warning ECU assembly detects that the steering angle neutral point memorization is incomplete during self diagnosis, C1AEA is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AEA

Steering Angle Midpoint Initial Setting Incomplete

Steering angle neutral point memorization incomplete
  • Steering sensor steering angle neutral point memorization incomplete
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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

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PROCEDURE

1.

PERFORM CALIBRATION

(a) Perform steering angle neutral point memorization.

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NEXT

2.

CHECK FOR DTC

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

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

(b) Clear the DTCs according to the screen on the Techstream.

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Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(c) Recheck for DTCs.

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

HINT:

  • If DTC C1AEA is output, perform steering angle neutral point memorization.
  • If DTC C1AEA is still output after performing steering angle neutral point memorization 3 times, replace the clearance warning ECU assembly.

Result

Proceed to

DTC C1AEA is output

A

DTC C1AEA is not output

B
A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

USE SIMULATION METHOD TO CHECK

    Brake System (C1A50)
    DESCRIPTION When a vehicle stability control system malfunction signal sent from the skid control ECU assembly is detected by the clearance warning ECU assembly, DTC C1A50 is stored. DTC No. Dete ...

    ICS Detection Area Adjustment Incomplete (C1AF0)
    DESCRIPTION When ICS detection area adjustment is incomplete, the clearance warning ECU assembly stores DTC C1AF0. DTC No. Detection Item DTC Detection Condition Trouble Area C1AF0 ICS ...

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