Toyota Corolla Cross: Ultrasonic Sensor (Rear Right Corner) Missing Message (C1AE987)
DESCRIPTION
This DTC is output when an open circuit or short occurs in the communication line between a rear corner ultrasonic sensor (RR sensor) and the rear center ultrasonic sensor (RRC sensor), or when a malfunction occurs in a rear corner ultrasonic sensor (RR sensor) on the rear.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1AE987 |
Ultrasonic Sensor (Rear Right Corner) Missing Message |
Rear corner ultrasonic sensor (RR sensor) lost communication |
|
WIRING DIAGRAM
for HEV Model
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for Gasoline Model
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CAUTION / NOTICE / HINT
NOTICE:
- Perform registration after replacing or removing and installing the
ultrasonic sensor or clearance warning ECU assembly.
Click here
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- 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.
PROCEDURE
|
1. |
CHECK DTC |
(a) If DTC C1AE896 is output, perform troubleshooting for DTC C1AE896 first.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
C1AE896 is not output |
A |
|
C1AE896 is output |
B |
| B | .gif)
|
GO TO C1AE896 |
|
.gif)
|
2. |
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 |
|
|
3. |
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.
|
|
4. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
5. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE987 is output |
B |
|
None of the above conditions are met |
C |
| A |
|
END (CONNECTOR CONNECTION MALFUNCTION) |
| C |
|
GO TO DTC CHART |
|
|
6. |
CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY) |
(a) Check that the connector is properly connected to the clearance warning ECU assembly.
|
|
7. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
8. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE687, C1AE787, C1AE887 and C1AE987 are output |
B |
|
C1AE787, C1AE887 and C1AE987 are output |
C |
|
C1AE887 and C1AE987 are output |
D |
|
C1AE987 is output |
E |
|
None of the above conditions are met |
F |
| A |
|
USE SIMULATION METHOD TO CHECK |
| B |
|
GO TO DTC (C1AE687) |
| C |
|
GO TO DTC (C1AE787) |
| D |
|
GO TO DTC (C1AE887) |
| F |
|
GO TO DTC CHART |
|
|
9. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for HEV Model |
A |
|
for Gasoline Model |
B |
| B |
|
GO TO STEP 14 |
|
|
10. |
CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR [RRC SENSOR] - REAR CORNER ULTRASONIC SENSOR [RR SENSOR]) |
(a) Disconnect the V2 rear center ultrasonic sensor (RRC sensor) connector.
(b) Disconnect the V3 rear corner ultrasonic sensor (RR sensor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V2-1 (BO) - V3-4 (BI) |
Always |
Below 1 Ω |
|
V2-2 (SO) - V3-5 (SI) |
Always |
Below 1 Ω |
|
V2-3 (EO) - V3-6 (EI) |
Always |
Below 1 Ω |
|
V2-1 (BO) or V3-4 (BI) - Body ground |
Always |
10 kΩ or higher |
|
V2-2 (SO) or V3-5 (SI) - Body ground |
Always |
10 kΩ or higher |
|
V2-3 (EO) or V3-6 (EI) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
11. |
REPLACE REAR CORNER ULTRASONIC SENSOR (RR SENSOR) |
(a) Replace the rear corner ultrasonic sensor (RR sensor) with a known good one.
HINT:
- Click here
- 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.
|
|
12. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
13. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE987 is output |
B |
|
None of the above conditions are met |
C |
| A |
|
END (REAR CORNER ULTRASONIC SENSOR [RR SENSOR] WAS DEFECTIVE) |
| B |
|
REPLACE CLEARANCE WARNING ECU ASSEMBLY |
| C |
|
GO TO DTC CHART |
|
14. |
CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR [RRC SENSOR] - REAR CORNER ULTRASONIC SENSOR [RR SENSOR]) |
(a) Disconnect the R16 rear center ultrasonic sensor (RRC sensor) connector.
(b) Disconnect the R17 rear corner ultrasonic sensor (RR sensor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R16-1 (BO) - R17-4 (BI) |
Always |
Below 1 Ω |
|
R16-2 (SO) - R17-5 (SI) |
Always |
Below 1 Ω |
|
R16-3 (EO) - R17-6 (EI) |
Always |
Below 1 Ω |
|
R16-1 (BO) or R17-4 (BI) - Body ground |
Always |
10 kΩ or higher |
|
R16-2 (SO) or R17-5 (SI) - Body ground |
Always |
10 kΩ or higher |
|
R16-3 (EO) or R17-6 (EI) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
GO TO STEP 11 |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Ultrasonic Sensor (Rear Right Corner) Component Internal Failure (C1AE996)
DESCRIPTION
The rear corner ultrasonic sensor (RR sensor) is installed on
the rear bumper. The clearance warning ECU assembly detects obstacles based on signals
it receives from the rear corner u
Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U110387)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication
system connected to the clearance warning ECU assembly.
HINT:
If CAN communication system DTCs are stored, the
Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the clearance warning
ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system bef
SEE MORE:
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 TAIL EXHAUST PIPE ASSEMBLY
17430
- -
2 MAIN MUFFLER UPPER HEAT INSULATOR
58320D -
- -
● Non-reusable part
- -
Operation Check
OPERATION CHECK CHECK ELECTRICAL REMOTE CONTROL MIRROR FUNCTION
(a) Turn the ignition switch to ON. (b) With L on the mirror select and mirror adjust switch selected, check that the outer rear view mirror assembly LH surface moves up, down, left and right normally.
(c) With R on the mirror select
