Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000002GAJN
Model Year Start: 2024 Model: RAV4 Prod Date Range: [10/2023 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline Model with Parking Support Brake System): C1AE187; Ultrasonic Sensor (Front Left Corner) Missing Message; 2024 MY RAV4 [10/2023 -        ]

DTC

C1AE187

Ultrasonic Sensor (Front Left 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 (FL sensor) and the clearance warning ECU assembly, or when a malfunction occurs in a front corner ultrasonic sensor (FL sensor) on the front.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE187

Ultrasonic Sensor (Front Left Corner) Missing Message

Front corner ultrasonic sensor (FL sensor) lost communication

  • Front corner ultrasonic sensor (FL 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 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline Model with Parking Support Brake System): CALIBRATION

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

    Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline Model with Parking Support Brake System): DTC CHECK / CLEAR

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

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

C1AE187 is not output

A

C1AE187 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 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline 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

Only C1AE187 is output

F

A

USE SIMULATION METHOD TO CHECK

B

GO TO DTC (C1AE487)

C

GO TO DTC (C1AE387)

D

GO TO DTC (C1AE287)

F

GO TO STEP 9

E

8.

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR [FL SENSOR])

  • *1: for TMMC Made
  • *2: for TMC Made

(a) Disconnect the G25*1 or H4*2 clearance warning ECU assembly connector.

(b) Disconnect the B5*1 or B18*2 front corner ultrasonic sensor (FL sensor) connector.

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

Standard Resistance:

for TMMC Made:

Tester Connection

Condition

Specified Condition

G25-2 (BOF) - B5-4 (BI)

Always

Below 1 Ω

G25-3 (SOF) - B5-5 (SI)

Always

Below 1 Ω

G25-4 (E5) - B5-6 (EI)

Always

Below 1 Ω

G25-2 (BOF) or B5-4 (BI) - Body ground

Always

10 kΩ or higher

G25-3 (SOF) or B5-5 (SI) - Body ground

Always

10 kΩ or higher

G25-4 (E5) or B5-6 (EI) - Body ground

Always

10 kΩ or higher

for TMC Made:

Tester Connection

Condition

Specified Condition

H4-2 (BOF) - B18-4 (BI)

Always

Below 1 Ω

H4-4 (SOF) - B18-5 (SI)

Always

Below 1 Ω

H4-3 (E5) - B18-6 (EI)

Always

Below 1 Ω

H4-2 (BOF) or B18-4 (BI) - Body ground

Always

10 kΩ or higher

H4-4 (SOF) or B18-5 (SI) - Body ground

Always

10 kΩ or higher

H4-3 (E5) or B18-6 (EI) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

REPLACE FRONT CORNER ULTRASONIC SENSOR (FL SENSOR)

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

Click here 2024 MY RAV4 RAV4 HV [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 - 2024 MY RAV4 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline 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 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline 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 [11/2018 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM (for Gasoline Model with Parking Support Brake System): DTC CHECK / CLEAR

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTC C1AE187 is not output

A

DTC C1AE187 is output

B

A

END (FRONT CORNER ULTRASONIC SENSOR [FL SENSOR] WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY