DTC C1AE9-87: Ultrasonic Sensor (Rear Right Corner) Missing Message [11/2023 - ]: 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 [11/2023 - ] 

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
   C1AE9-87 is not output	A
   C1AE9-87 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
   C1AE6-87, C1AE7-87 and C1AE8-87 are output	C
   C1AE6-87 and C1AE7-87 are output	D
   C1AE6-87 is output	E
   Only C1AE9-87 is output	F

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

C 

GO TO DTC (C1AE8-87). Refer to  DTC C1AE8-87: Ultrasonic Sensor (Rear Right Center) Missing Message [11/2023 - ]  

Result: 

D 

GO TO DTC (C1AE7-87). Refer to  DTC C1AE7-87: Ultrasonic Sensor (Rear Left Center) Missing Message [11/2023 - ]  

Result: 

E 

GO TO DTC (C1AE6-87). Refer to  DTC C1AE6-87: Ultrasonic Sensor (Rear Left Corner) Missing Message [11/2023 - ]  

Result: 

F 

See step  9

Result: 

B 

See step  8

Pre-procedure1

1. Disconnect the H46 clearance warning ECU assembly connector.
2. Disconnect the V12 rear corner ultrasonic sensor RH connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H46-19 (BOR) - V12-4 (BI)	Always	Below 1 Ω
   H46-21 (SOR) - V12-5 (SI)	Always	Below 1 Ω
   H46-20 (E1) - V12-6 (EI)	Always	Below 1 Ω
   H46-19 (BOR) or V12-4 (BI) - Body ground	Always	10 kΩ or higher
   H46-21 (SOR) or V12-5 (SI) - Body ground	Always	10 kΩ or higher
   H46-20 (E1) or V12-6 (EI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Replace the rear corner ultrasonic sensor RH with a known good one.

   HINT: 

   Refer to REMOVAL [11/2023 - ]

   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. 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
   C1AE9-87 is not output	A
   C1AE9-87 is output	B

Result: 

A 

END (REAR CORNER ULTRASONIC SENSOR RH WAS DEFECTIVE) 

Result: 

B 

REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [11/2023 - ]