Lexus NX: Rear Right Sensor Malfunction (C1AE9)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE9

Rear Right Sensor Malfunction

A malfunction of the rear corner ultrasonic sensor (RR sensor).

  • Rear corner ultrasonic sensor (RR sensor)
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

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

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PROCEDURE

1.

CHECK DTC OUTPUT

(a) Check for DTCs.

Click here

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

Result

Proceed to

No DTCs are output

A

Only DTC C1AE9 is output

B

DTC C1AE9 and C1AED are output

C

A

USE SIMULATION METHOD TO CHECK

C

GO TO DTC (C1AED)

B

2.

REPLACE REAR CORNER ULTRASONIC SENSOR (RR SENSOR)

(a) Replace the rear corner ultrasonic sensor (RR sensor) with a known good one.

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HINT:

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

3.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

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

(b) Check for DTCs.

Click here

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

Result

Proceed to

No DTCs are output

A

DTC C1AE9 is output

B

A

END (REAR CORNER ULTRASONIC SENSOR [RR SENSOR] WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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