Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Ultrasonic Sensor (Rear Left Center) Component Internal Failure (C1AE796)

Toyota Corolla Cross (2022-2026) Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Intuitive Parking Assist System / Ultrasonic Sensor (Rear Left Center) Component Internal Failure (C1AE796)

DESCRIPTION

The rear center ultrasonic sensor (RLC sensor) is installed on the rear bumper. The clearance warning ECU assembly detects obstacles based on signals it receives from the rear center ultrasonic sensor (RLC sensor). If an open circuit or other malfunction occurs in the rear center ultrasonic sensor (RLC sensor), the rear center ultrasonic sensor (RLC sensor) does not operate correctly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE796

Ultrasonic Sensor (Rear Left Center) Component Internal Failure

Rear center ultrasonic sensor (RLC sensor) failure
  • Rear center ultrasonic sensor (RLC sensor)
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • Perform registration after replacing or removing and installing the ultrasonic sensor or clearance warning ECU assembly.

    Click here

  • If a DTC is detected again after the repair, turn the ignition switch to ON and turn the intuitive parking assist system on, and then clear the DTC.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTCs are not output

A

C1AE796 and C1AE787 are output

B

C1AE796 is output

C

None of the above conditions are met

D
A

USE SIMULATION METHOD TO CHECK

B

GO TO DTC (C1AE787)

D

GO TO DTC CHART

C

3.

REPLACE REAR CENTER ULTRASONIC SENSOR (RLC SENSOR)

(a) Replace the rear center ultrasonic sensor (RLC sensor) with a known good one.

HINT:

  • Click here
  • All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.
NEXT

4.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
NEXT

5.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTCs are not output

A

C1AE796 is output

B

None of the above conditions are met

C
A

END (REAR CENTER ULTRASONIC SENSOR [RLC SENSOR] WAS DEFECTIVE)
B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

C

GO TO DTC CHART

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