Toyota Corolla Cross: Ultrasonic Sensor (Front Left Corner) Missing Message (C1AE187)
DESCRIPTION
This DTC is output when an open circuit or short occurs in the communication line between a front corner ultrasonic sensor (FL sensor) and the clearance warning ECU assembly, or when a malfunction occurs in a front corner ultrasonic sensor (FL sensor) on the front.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1AE187 |
Ultrasonic Sensor (Front Left Corner) Missing Message |
Front corner ultrasonic sensor (FL sensor) lost communication |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Perform registration after replacing or removing and installing the
ultrasonic sensor or clearance warning ECU assembly.
Click here
.gif)
- 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. |
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 | .gif)
|
GO TO CALIBRATION
|
|
.gif)
|
2. |
CHECK CONNECTOR CONNECTION CONDITION (ULTRASONIC SENSOR) |
(a) Check that the connector is properly connected to the front corner ultrasonic sensor and front center ultrasonic sensor.
|
|
3. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
4. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE187 is output |
B |
|
None of the above conditions are met |
C |
| A |
|
END (CONNECTOR CONNECTION MALFUNCTION) |
| C |
|
GO TO DTC CHART
|
|
|
5. |
CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY) |
(a) Check that the connector is properly connected to the clearance warning ECU assembly.
|
|
6. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
7. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE187, C1AE287, C1AE387 and C1AE487 are output |
B |
|
C1AE287, C1AE387 and C1AE487 are output |
C |
|
C1AE387 and C1AE487 are output |
D |
|
C1AE487 is output |
E |
|
Only C1AE187 is output |
F |
|
None of the above conditions are met |
G |
| A |
|
USE SIMULATION METHOD TO CHECK |
| C |
|
GO TO DTC (C1AE287) |
| D |
|
GO TO DTC (C1AE387) |
| E |
|
GO TO DTC (C1AE487) |
| F |
|
GO TO STEP 9 |
| G |
|
GO TO DTC CHART
|
|
|
8. |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR [FL SENSOR]) |
(a) Disconnect the I24 clearance warning ECU assembly connector.
(b) Disconnect the B9 front corner ultrasonic sensor (FL sensor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I24-2 (BOF) - B9-4 (BI) |
Always |
Below 1 Ω |
|
I24-4 (SOF) - B9-5 (SI) |
Always |
Below 1 Ω |
|
I24-3 (E5) - B9-6 (EI) |
Always |
Below 1 Ω |
|
I24-2 (BOF) or B9-4 (BI) - Body ground |
Always |
10 kΩ or higher |
|
I24-4 (SOF) or B9-5 (SI) - Body ground |
Always |
10 kΩ or higher |
|
I24-3 (E5) or B9-6 (EI) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
9. |
REPLACE FRONT CORNER ULTRASONIC SENSOR (FL SENSOR) |
(a) Replace the front corner ultrasonic sensor (FL 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.
|
|
10. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
|
|
11. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
C1AE187 is output |
B |
|
None of the above conditions are met |
C |
| A |
|
END (FRONT CORNER ULTRASONIC SENSOR [FL SENSOR] WAS DEFECTIVE) |
| B |
|
REPLACE CLEARANCE WARNING ECU ASSEMBLY
|
| C |
|
GO TO DTC CHART
|
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Installation
INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION)
Procedure Part Name Code
1 WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
16031
- -
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- -
