Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001HCGV
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [02/2019 - 10/2023]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): C1AE487; Ultrasonic Sensor (Front Right Corner) Missing Message; 2019 - 2023 MY RAV4 HV [02/2019 - 10/2023]

DTC

C1AE487

Ultrasonic Sensor (Front Right Corner) Missing Message

DESCRIPTION

This DTC is output when an open circuit or short occurs in the communication line between a front corner ultrasonic sensor (FR sensor) and the front center ultrasonic sensor (FRC sensor), or when a malfunction occurs in a front corner ultrasonic sensor (FR sensor) on the front.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE487

Ultrasonic Sensor (Front Right Corner) Missing Message

Front corner ultrasonic sensor (FR sensor) lost communication
  • Front corner ultrasonic sensor (FR sensor)
  • Harness or connector
  • Clearance warning ECU assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): CALIBRATION

  • If a DTC is detected again after the repair, turn the power switch on (IG) and turn the intuitive parking assist system on, and then clear the DTC.

    Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

  • If C1AE396 is output at the same time, check C1AE396 first.

    Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): C1AE396; Ultrasonic Sensor (Front Right Center) Component Internal Failure

PROCEDURE

1.

VEHICLE CONDITION AND WORK DETAILS CHECK

(a) Check the vehicle condition and work details.

Result

Proceed to

The clearance warning ECU assembly or ultrasonic sensor has not been replaced

A

The clearance warning ECU assembly or ultrasonic sensor has been replaced

B
B

GO TO CALIBRATION 2019 - 2022 MY RAV4 HV [02/2019 - 10/2022]; PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for HV Model): CALIBRATION 2023 MY RAV4 HV [10/2022 - 10/2023]; PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for HV Model): CALIBRATION

A

2.

CHECK CONNECTOR CONNECTION CONDITION (ULTRASONIC SENSOR)

(a) Check that the connector is properly connected to the front corner ultrasonic sensor and front center ultrasonic sensor.

NEXT

3.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs

NEXT

4.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

C1AE487 is not output

A

C1AE487 is output

B
A

END (CONNECTOR CONNECTION MALFUNCTION)
B

5.

CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)

(a) Check that the connector is properly connected to the clearance warning ECU assembly.

NEXT

6.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs

NEXT

7.

CHECK FOR DTC

(a) Recheck for DTCs.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

Body Electrical > Clearance Warning > Trouble Codes

DTC OUTPUT COMBINATION:

Symptoms

DTC Detection

C1AE187

C1AE287

C1AE387

C1AE487

Symptom 1

Not output

Not output

Not output

Not output

Symptom 2

Not output

Not output

Not output

Output

Symptom 3

Not output

Not output

Output

Output

Symptom 4

Not output

Output

Output

Output

Symptom 5

Output

Output

Output

Output

Result

Proceed to

Listed under symptom 1 in combination table

A

Listed under symptom 2 in combination table

B

Listed under symptom 3 in combination table

C

Listed under symptom 4 in combination table

D

Listed under symptom 5 in combination table

E
A

USE SIMULATION METHOD TO CHECK

C

GO TO DTC (C1AE387)

D

GO TO DTC (C1AE287)

E

GO TO DTC (C1AE187)

B

8.

CHECK HARNESS AND CONNECTOR (FRONT CENTER ULTRASONIC SENSOR [FRC SENSOR] - FRONT CORNER ULTRASONIC SENSOR [FR SENSOR])

(a) Disconnect the B3 front center ultrasonic sensor (FRC sensor) connector.

(b) Disconnect the B1 front corner ultrasonic sensor (FR sensor) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

B3-1 (BO) - B1-4 (BI)

Always

Below 1 Ω

B3-2 (SO) - B1-5 (SI)

Always

Below 1 Ω

B3-3 (EO) - B1-6 (EI)

Always

Below 1 Ω

B3-1 (BO) or B1-4 (BI) - Body ground

Always

10 kΩ or higher

B3-2 (SO) or B1-5 (SI) - Body ground

Always

10 kΩ or higher

B3-3 (EO) or B1-6 (EI) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

REPLACE FRONT CORNER ULTRASONIC SENSOR (FR SENSOR)

(a) Replace the front corner ultrasonic sensor (FR sensor) with a known good one.

Click here 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Front): REMOVAL 2021 - 2023 MY RAV4 RAV4 HV [08/2020 - 10/2023]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Front): REMOVAL

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

10.

CHECK FOR DTC

(a) Check for DTCs.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

Body Electrical > Clearance Warning > Trouble Codes

(b) Clear the DTCs.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

Body Electrical > Clearance Warning > Clear DTCs

(c) Recheck for DTCs.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTC C1AE487 is not output

A

DTC C1AE487 is output

B
A

END (FRONT CORNER ULTRASONIC SENSOR [FR SENSOR] WAS DEFECTIVE)
B

REPLACE CLEARANCE WARNING ECU ASSEMBLY