Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Ultrasonic Sensor (Front Right Center) Missing Message (C1AE387)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE387

Ultrasonic Sensor (Front Right Center) Missing Message

Front center ultrasonic sensor (FRC sensor) lost communication

  • Front center ultrasonic sensor (FRC 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

  • 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.

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.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
NEXT

5.

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

None of the above conditions are met

C

A

END (CONNECTOR CONNECTION MALFUNCTION)

C

GO TO DTC CHART

B

6.

CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)

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

NEXT

7.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
NEXT

8.

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 not output

E

Only C1AE387 is output

F

None of the above conditions are met

G

A

USE SIMULATION METHOD TO CHECK

B

GO TO DTC (C1AE187)

C

GO TO DTC (C1AE287)

E

GO TO DTC (C1AE487)

F

GO TO STEP 10

G

GO TO DTC CHART

D

9.

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

(a) Disconnect the B10 front center ultrasonic sensor (FLC sensor) connector.

(b) Disconnect the B11 front center ultrasonic sensor (FRC sensor) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B10-1 (BO) - B11-4 (BI)

Always

Below 1 Ω

B10-2 (SO) - B11-5 (SI)

Always

Below 1 Ω

B10-3 (EO) - B11-6 (EI)

Always

Below 1 Ω

B10-1 (BO) or B11-4 (BI) - Body ground

Always

10 kΩ or higher

B10-2 (SO) or B11-5 (SI) - Body ground

Always

10 kΩ or higher

B10-3 (EO) or B11-6 (EI) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.

REPLACE FRONT CENTER ULTRASONIC SENSOR (FRC SENSOR)

(a) Replace the front center ultrasonic sensor (FRC sensor) with a known good one.

HINT:

  • Click here
  • 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

11.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
NEXT

12.

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

None of the above conditions are met

C

A

END (FRONT CENTER ULTRASONIC SENSOR [FRC SENSOR] WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

C

GO TO DTC CHART

    READ NEXT:

     Ultrasonic Sensor (Front Right Center) Component Internal Failure (C1AE396)

    DESCRIPTION The front center ultrasonic sensor (FRC sensor) is installed on the front bumper. The clearance warning ECU assembly detects obstacles based on signals it receives from the front cent

     Ultrasonic Sensor (Front Right Corner) Missing Message (C1AE487)

    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 sens

     Ultrasonic Sensor (Front Right Corner) Component Internal Failure (C1AE496)

    DESCRIPTION The front corner ultrasonic sensor (FR sensor) is installed on the front bumper. The clearance warning ECU assembly detects obstacles based on signals it receives from the front corne

    SEE MORE:

     A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold (P219519,P219524,P219618,P219623)

    DESCRIPTION Refer to DTC P003012. Click here HINT: Although the DTC titles say O2 sensor, these DTCs relate to the air fuel ratio sensor (sensor 1). DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P219519 A/F (O2) Sensor Signal Biased/Stuck Le

     Removal

    REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL) Procedure Part Name Code 1 RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM - - - 2 FAN AND GENERATOR V BELT 16361A - - - 3 NO. 1 ENGINE UNDER COVER ASS

    © 2020-2024 Copyright www.tcorollacross.com