DTC C1AE7-87: Ultrasonic Sensor (Rear Left Center) Missing Message [08/2023 - ]: Procedure

1. If DTC C1AE6-96 is output, perform troubleshooting for DTC C1AE6-96 first.

   Body Electrical > Clearance Warning > Trouble Codes 

   Result

   Result	Proceed to
   C1AE6-96 is not output	A
   C1AE6-96 is output	B

Result: 

B 

GO TO C1AE6-96 

Refer to DTC C1AE6-96: Ultrasonic Sensor (Rear Left Corner) Component Internal Failure [08/2023 - ] 

Result: 

A 

See step  2

1. Check the vehicle condition and work details.

   Result

   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

Result: 

B 

GO TO CALIBRATION 

Refer to CALIBRATION [08/2023 - 09/2024] , or refer to CALIBRATION [09/2024 - ]

Result: 

A 

See step  3

1. Check that the connector is properly connected to the rear corner ultrasonic sensor and rear center ultrasonic sensor.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. According to the display on the GTS, check for DTCs.

   Body Electrical > Clearance Warning > Trouble Codes 

2. According to the display on the GTS, clear the DTCs.

   Body Electrical > Clearance Warning > Clear DTCs 

3. Recheck for DTCs.

   Body Electrical > Clearance Warning > Trouble Codes 

   Result

   Result	Proceed to
   C1AE7-87 is not output	A
   C1AE7-87 is output	B

Result: 

A 

END (CONNECTOR CONNECTION MALFUNCTION) 

Result: 

B 

See step  5

1. Check that the connector is properly connected to the clearance warning ECU assembly.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Clear the DTCs.

   Body Electrical > Clearance Warning > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check for DTCs.

   Body Electrical > Clearance Warning > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   C1AE6-87, C1AE7-87, C1AE8-87 and C1AE9-87 are output	B
   C1AE7-87, C1AE8-87 and C1AE9-87 are output	C
   C1AE8-87 and C1AE9-87 are output	D
   C1AE9-87 is output	E
   C1AE7-87 is output	F

Result: 

A 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result: 

B 

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM [C1AE6-87]) 

Refer to DTC C1AE6-87: Ultrasonic Sensor (Rear Left Corner) Missing Message [08/2023 - ] 

Result: 

D 

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE8-87)) 

Refer to DTC C1AE8-87: Ultrasonic Sensor (Rear Right Center) Missing Message [08/2023 - ] 

Result: 

E 

GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE9-87)) 

Refer to DTC C1AE9-87: Ultrasonic Sensor (Rear Right Corner) Missing Message [08/2023 - ] 

Result: 

F 

See step  9

Result: 

C 

See step  8

Pre-procedure1

1. Disconnect the P2 rear center ultrasonic sensor LH connector.
2. Disconnect the P1 rear corner ultrasonic sensor LH connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P1-1 (BO) - P2-4 (BI)	Always	Below 1 Ω
   P1-2 (SO) - P2-5 (SI)	Always	Below 1 Ω
   P1-3 (EO) - P2-6 (EI)	Always	Below 1 Ω
   P1-1 (BO) or P2-4 (BI) - Body ground	Always	10 kΩ or higher
   P1-2 (SO) or P2-5 (SI) - Body ground	Always	10 kΩ or higher
   P1-3 (EO) or P2-6 (EI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Replace the rear center ultrasonic sensor LH with a known good one.

   HINT: 

   • Refer to REMOVAL [08/2023 - 09/2024] , or refer to REMOVAL [09/2024 - ]
   • 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.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

1. Clear the DTCs.

   Body Electrical > Clearance Warning > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11

1. Check for DTCs.

   Body Electrical > Clearance Warning > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   C1AE7-87 is output	B

Result: 

A 

END (REAR CENTER ULTRASONIC SENSOR LH WAS DEFECTIVE) 

Result: 

B 

REPLACE CLEARANCE WARNING ECU ASSEMBLY 

Refer to REMOVAL [08/2023 - 09/2024] , or refer to REMOVAL [09/2024 - ]