Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002D8AF
Model Year Start: 2024 Model: GR Corolla Prod Date Range: [08/2023 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE387; Ultrasonic Sensor (Front Right Center) Missing Message; 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]

DTC

C1AE387

Ultrasonic Sensor (Front Right Center) Missing Message

DESCRIPTION

This DTC is stored when an open circuit or short occurs in the communication line between the front center ultrasonic sensor RH and the front center ultrasonic sensor LH, or when a malfunction occurs in the front center ultrasonic sensor RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

C1AE387

Ultrasonic Sensor (Front Right Center) Missing Message

Front center ultrasonic sensor RH lost communication
  • Front center ultrasonic sensor RH
  • Harness or connector
  • Clearance warning ECU assembly

Clearance Warning

B

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: CALIBRATION

  • 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.
  • If C1AE296 is output at the same time, check C1AE296 first.

    Click here 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE296; Ultrasonic Sensor (Front Left Center) Component Internal Failure

PROCEDURE

1.

CHECK DTC

(a) If DTC C1AE296 is output, perform troubleshooting for DTC C1AE296 first.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

C1AE296 is not output

A

C1AE296 is output

B
B

GO TO C1AE296

A

2.

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

3.

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

4.

CHECK FOR DTC

(a) According to the display on the GTS, check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

(b) According to the display on the GTS, clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs

(c) Recheck for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

C1AE387 is not output

A

C1AE387 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) Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTCs are not output

A

C1AE187, C1AE287, C1AE387 and C1AE487 are output

B

C1AE287, C1AE387 and C1AE487 are output

C

C1AE387 and C1AE487 are output

D

C1AE487 is output

E

C1AE387 is output

F
A

USE SIMULATION METHOD TO CHECK

B

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE187))

C

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE287))

E

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE487))

F

GO TO STEP 9

D

8.

CHECK WIRE HARNESS AND CONNECTOR (FRONT CENTER ULTRASONIC SENSOR LH - FRONT CENTER ULTRASONIC SENSOR RH)

Pre-procedure1

(a) Disconnect the B2 front center ultrasonic sensor LH connector.

(b) Disconnect the B3 front center ultrasonic sensor RH connector.

Procedure1

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B2-1 (BO) - B3-4 (BI)

Always

Below 1 Ω

B2-2 (SO) - B3-5 (SI)

Always

Below 1 Ω

B2-3 (EO) - B3-6 (EI)

Always

Below 1 Ω

B2-1 (BO) or B3-4 (BI) - Body ground

Always

10 kΩ or higher

B2-2 (SO) or B3-5 (SI) - Body ground

Always

10 kΩ or higher

B2-3 (EO) or B3-6 (EI) - Body ground

Always

10 kΩ or higher

Post-procedure1

(d) None

NG

REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
OK

9.

REPLACE FRONT CENTER ULTRASONIC SENSOR RH

(a) Replace the front center ultrasonic sensor RH with a new or normally functioning one.

HINT:

  • Click here 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Front Side): REMOVAL
  • To check if the ultrasonic sensor is functioning correctly, replace it with another ultrasonic sensor.
NEXT

10.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs

NEXT

11.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes

Result

Proceed to

DTCs are not output

A

C1AE387 is output

B
A

END (FRONT CENTER ULTRASONIC SENSOR RH WAS DEFECTIVE)
B

REPLACE CLEARANCE WARNING ECU ASSEMBLY