Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001RIK9
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE687; Ultrasonic Sensor (Rear Left Corner) Missing Message; 2021 - 2024 MY Camry [10/2020 -        ]

DTC

C1AE687

Ultrasonic Sensor (Rear Left Corner) Missing Message

DESCRIPTION

This DTC is output when an open circuit or short occurs in the communication line between as rear corner ultrasonic sensor LH and the rear center ultrasonic sensor LH, or when a malfunction occurs in a rear corner ultrasonic sensor LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE687

Ultrasonic Sensor (Rear Left Corner) Missing Message

Rear corner ultrasonic sensor LH lost communication
  • Rear corner ultrasonic sensor LH
  • 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 2021 - 2024 MY Camry [10/2020 -        ]; 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.

    Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: DTC CHECK / CLEAR

  • If C1AE796 is output at the same time, check C1AE796 first.

    Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE796; Ultrasonic Sensor (Rear Left 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

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.

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

C1AE687 is not output

A

C1AE687 is output

B
A

END (CONNECTOR CONNECTION MALFUNCTION)
B

4.

CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)

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

NEXT

5.

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

DTC OUTPUT COMBINATION:

Symptoms

DTC Detection

C1AE987

C1AE887

C1AE787

C1AE687

Symptom 1

Not output

Not output

Not output

Not output

Symptom 2

Output

Output

Output

Output

Symptom 3

Not output

Output

Output

Output

Symptom 4

Not output

Not output

Output

Output

Symptom 5

Not output

Not output

Not 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 2021 MY Camry [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

B

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE987))

C

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE887))

D

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE787))

E

6.

CHECK WIRE HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR LH - REAR CORNER ULTRASONIC SENSOR LH)

(a) Disconnect the X7 rear center ultrasonic sensor LH connector.

(b) Disconnect the X8 rear corner ultrasonic sensor LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

X7-1 (BO) - X8-4 (BI)

Always

Below 1 Ω

X7-2 (SO) - X8-5 (SI)

Always

Below 1 Ω

X7-3 (EO) - X8-6 (EI)

Always

Below 1 Ω

X7-1 (BO) or X8-4 (BI) - Body ground

Always

10 kΩ or higher

X7-2 (SO) or X8-5 (SI) - Body ground

Always

10 kΩ or higher

X7-3 (EO) or X8-6 (EI) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
OK

7.

REPLACE REAR CORNER ULTRASONIC SENSOR LH

(a) Replace the rear corner ultrasonic sensor LH with a new or normally functioning one.

Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR (for Rear): REMOVAL

HINT:

To check if the ultrasonic sensor is functioning correctly, replace it with another ultrasonic sensor.

NEXT

8.

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

No DTC is output

A

"C1AE687" is output

B
A

END (REAR CORNER ULTRASONIC SENSOR LH WAS DEFECTIVE)
B

REPLACE CLEARANCE WARNING ECU ASSEMBLY