| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002D8AL |
| Model Year Start: 2024 | Model: GR Corolla | Prod Date Range: [08/2023 - ] |
| Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE787; Ultrasonic Sensor (Rear Left Center) Missing Message; 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 - ] | ||
|
DTC |
C1AE787 |
Ultrasonic Sensor (Rear Left Center) Missing Message |
DESCRIPTION
This DTC is stored when an open circuit or short occurs in the communication line between the rear center ultrasonic sensor LH and the rear corner ultrasonic sensor LH, or when a malfunction occurs in the rear center ultrasonic sensor LH.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
C1AE787 |
Ultrasonic Sensor (Rear Left Center) Missing Message |
Rear center ultrasonic sensor LH lost communication |
|
Clearance Warning |
B |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Perform registration after replacing or removing and installing the ultrasonic sensor or clearance warning ECU assembly.
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![2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 - ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.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.
-
If C1AE696 is output at the same time, check C1AE696 first.
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PROCEDURE
|
1. |
CHECK DTC |
(a) If DTC C1AE696 is output, perform troubleshooting for DTC C1AE696 first.
Body Electrical > Clearance Warning > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
C1AE696 is not output |
A |
|
C1AE696 is output |
B |
| B |
|
|
|
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 |
|
|
|
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. |
CHECK FOR DTC |
(a) According to the display on the GTS, check for DTCs.
Body Electrical > Clearance Warning > Trouble Codes
(b) According to the display on the GTS, clear the DTCs.
Body Electrical > Clearance Warning > Clear DTCs
(c) Recheck for DTCs.
Body Electrical > Clearance Warning > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
C1AE787 is not output |
A |
|
C1AE787 is output |
B |
| A |
|
END (CONNECTOR CONNECTION MALFUNCTION) |
|
|
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 |
|
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 |
|
C1AE787 is output |
F |
| A |
|
| B |
|
GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM [C1AE687]) |
| D |
|
GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE887)) |
| E |
|
GO TO CORRESPONDING FLOWCHART (INTUITIVE PARKING ASSIST SYSTEM (C1AE987)) |
| F |
|
|
|
8. |
CHECK WIRE HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR LH - REAR CORNER ULTRASONIC SENSOR LH) |
Pre-procedure1
(a) Disconnect the P2 rear center ultrasonic sensor LH connector.
(b) Disconnect the P1 rear corner ultrasonic sensor LH connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P1-1 (BO) - P2-4 (BI) |
Always |
Below 1 Ω |
|
P1-2 (SO) - P2-5 (SI) |
Always |
Below 1 Ω |
|
P1-3 (EO) - P2-6 (EI) |
Always |
Below 1 Ω |
|
P1-1 (BO) or P2-4 (BI) - Body ground |
Always |
10 kΩ or higher |
|
P1-2 (SO) or P2-5 (SI) - Body ground |
Always |
10 kΩ or higher |
|
P1-3 (EO) or P2-6 (EI) - Body ground |
Always |
10 kΩ or higher |
Post-procedure1
(d) None
| NG |
|
REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR |
|
|
9. |
REPLACE REAR CENTER ULTRASONIC SENSOR LH |
(a) Replace the rear center ultrasonic sensor LH with a known good one.
HINT:
-
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- 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 |
|
C1AE787 is output |
B |
| A |
|
END (REAR CENTER ULTRASONIC SENSOR LH WAS DEFECTIVE) |
| B |
|
|
|