DTC C1AE8-87: Ultrasonic Sensor (Rear Right Center) Missing Message [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 [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
   C1AE8-87 is not output	A
   C1AE8-87 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 C1AE8-87 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 [10/2023 - ]  

Result: 

D 

GO TO DTC (C1AE7-87). Refer to  DTC C1AE7-87: Ultrasonic Sensor (Rear Left Center) Missing Message [10/2023 - ]  

Result: 

E 

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

Result: 

F 

See step  9

Result: 

C 

See step  8

1. *1: for TMMC Made
2. *2: for TMC Made

1. Disconnect the Q5*1 or Q19*2 rear center ultrasonic sensor (RLC sensor) connector.
2. Disconnect the Q4*1 or Q16*2 rear center ultrasonic sensor (RRC sensor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR TMMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   Q5-1 (BO) - Q4-4 (BI)	Always	Below 1 Ω
   Q5-2 (SO) - Q4-5 (SI)	Always	Below 1 Ω
   Q5-3 (EO) - Q4-6 (EI)	Always	Below 1 Ω
   Q5-1 (BO) or Q4-4 (BI) - Body ground	Always	10 kΩ or higher
   Q5-2 (SO) or Q4-5 (SI) - Body ground	Always	10 kΩ or higher
   Q5-3 (EO) or Q4-6 (EI) - Body ground	Always	10 kΩ or higher

   FOR TMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   Q19-1 (BO) - Q16-4 (BI)	Always	Below 1 Ω
   Q19-2 (SO) - Q16-5 (SI)	Always	Below 1 Ω
   Q19-3 (EO) - Q16-6 (EI)	Always	Below 1 Ω
   Q19-1 (BO) or Q16-4 (BI) - Body ground	Always	10 kΩ or higher
   Q19-2 (SO) or Q16-5 (SI) - Body ground	Always	10 kΩ or higher
   Q19-3 (EO) or Q16-6 (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 (RRC sensor) with a known good one.

   Refer to REMOVAL [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 C1AE8-87 is not output	A
   DTC C1AE8-87 is output	B

Result: 

A 

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

Result: 

B 

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