DTC C1AE7-87: Ultrasonic Sensor (Rear Left Center) Missing Message [02/2019 - 10/2023]: Procedure

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 [02/2019 - 10/2022]  , or refer to  CALIBRATION [10/2022 - 10/2023] 

Result: 

A 

See step  2

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  3

1. Clear the DTCs.

   Body Electrical > Clearance Warning > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check 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. Recheck for DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Clearance Warning > Trouble Codes 

   DTC OUTPUT COMBINATION:
   
   

   Symptoms	DTC Detection
   	C1AE6-87	C1AE7-87	C1AE8-87	C1AE9-87
   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

   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 C1AE7-87 is output	F

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

B 

GO TO DTC (C1AE9-87). Refer to  DTC C1AE9-87: Ultrasonic Sensor (Rear Right Corner) Missing Message [02/2019 - 10/2023]  

Result: 

C 

GO TO DTC (C1AE8-87). Refer to  DTC C1AE8-87: Ultrasonic Sensor (Rear Right Center) Missing Message [02/2019 - 10/2023]  

Result: 

E 

GO TO DTC (C1AE6-87). Refer to  DTC C1AE6-87: Ultrasonic Sensor (Rear Left Corner) Missing Message [02/2019 - 10/2023]  

Result: 

F 

See step  9

Result: 

D 

See step  8

1. Disconnect the Q6 rear corner ultrasonic sensor (RL sensor) connector.
2. Disconnect the Q5 rear center ultrasonic sensor (RLC sensor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q6-1 (BO) - Q5-4 (BI)	Always	Below 1 Ω
   Q6-2 (SO) - Q5-5 (SI)	Always	Below 1 Ω
   Q6-3 (EO) - Q5-6 (EI)	Always	Below 1 Ω
   Q6-1 (BO) or Q5-4 (BI) - Body ground	Always	10 kΩ or higher
   Q6-2 (SO) or Q5-5 (SI) - Body ground	Always	10 kΩ or higher
   Q6-3 (EO) or Q5-6 (EI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Replace the rear center ultrasonic sensor (RLC sensor) with a known good one.

   Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

   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.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Clearance Warning > Trouble Codes 

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Clearance Warning > Clear DTCs 

3. Recheck for DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Clearance Warning > Trouble Codes 

   Result

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

Result: 

A 

END (REAR CENTER ULTRASONIC SENSOR [RLC SENSOR] WAS DEFECTIVE) 

Result: 

B 

REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [02/2019 - ]