Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001HCGZ
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): C1AE787; Ultrasonic Sensor (Rear Left Center) Missing Message; 2019 - 2023 MY RAV4 HV [02/2019 - 10/2023]

DTC

C1AE787

Ultrasonic Sensor (Rear Left Center) Missing Message

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE787

Ultrasonic Sensor (Rear Left Center) Missing Message

Rear center ultrasonic sensor (RLC sensor) lost communication
  • Rear center ultrasonic sensor (RLC 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 - 2024 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 - 2024 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): DTC CHECK / CLEAR

  • If C1AE696 is output at the same time, check C1AE696 first.

    Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for HV Model with Parking Support Brake System): C1AE696; Ultrasonic Sensor (Rear Left Corner) 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 rear corner ultrasonic sensor and rear 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

C1AE787 is not output

A

C1AE787 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 - 2024 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

C1AE687

C1AE787

C1AE887

C1AE987

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

Only C1AE787 is output

F
A

USE SIMULATION METHOD TO CHECK

B

GO TO DTC (C1AE987)

C

GO TO DTC (C1AE887)

E

GO TO DTC (C1AE687)

F

GO TO STEP 9

D

8.

CHECK HARNESS AND CONNECTOR (REAR CORNER ULTRASONIC SENSOR [RL SENSOR] - REAR CENTER ULTRASONIC SENSOR [RLC SENSOR])

(a) Disconnect the Q6 rear corner ultrasonic sensor (RL sensor) connector.

(b) Disconnect the Q5 rear center ultrasonic sensor (RLC sensor) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Q6-1 (BO) - Q5-4 (BI)

Always

Below 1 Ω

Q6-2 (SO) - Q5-5 (SI)

Always

Below 1 Ω

Q6-3 (EO) - Q5-6 (EI)

Always

Below 1 Ω

Q6-1 (BO) or Q5-4 (BI) - Body ground

Always

10 kΩ or higher

Q6-2 (SO) or Q5-5 (SI) - Body ground

Always

10 kΩ or higher

Q6-3 (EO) or Q5-6 (EI) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

REPLACE REAR CENTER ULTRASONIC SENSOR (RLC SENSOR)

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

Click here 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): 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 - 2024 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 - 2024 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 - 2024 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 C1AE787 is not output

A

DTC C1AE787 is output

B
A

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

REPLACE CLEARANCE WARNING ECU ASSEMBLY