RM38N0EC _56 Audio / Visual / Telematics _111825 PARK ASSIST / MONITORING _0501856 TOYOTA PARKING ASSIST-SENSOR SYSTEM C

PARK ASSIST / MONITORING  TOYOTA PARKING ASSIST-SENSOR SYSTEM  C1AE187  Ultrasonic Sensor (Front Left Corner) Missing Message  


DESCRIPTION

This DTC is stored when an open circuit or short occurs in the communication line between the front corner ultrasonic sensor LH and the clearance warning ECU assembly, or when a malfunction occurs in the front corner ultrasonic sensor LH.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
C1AE187 Ultrasonic Sensor (Front Left Corner) Missing Message Front corner ultrasonic sensor LH lost communication
·

Front corner ultrasonic sensor LH

·

Harness or connector

·

Clearance warning ECU assembly


Clearance Warning A

WIRING DIAGRAM

E410481E45
3.844,0.958 4.083,1.208 0.24,0.25 10 false BI 3.854,1.354 4.042,1.542 0.188,0.188 10 false EI 3.844,0.552 4.073,0.781 0.229,0.229 10 false SI 3.156,0.563 3.458,0.781 0.302,0.219 10 false SO 3.156,1.365 3.458,1.594 0.302,0.229 10 false EO 3.156,0.969 3.49,1.229 0.333,0.26 10 false BO 1.313,0.969 1.583,1.188 0.271,0.219 10 false BI 1.323,1.365 1.594,1.604 0.271,0.24 10 false EI 1.302,0.563 1.583,0.813 0.281,0.25 10 false SI 1.271,3.49 1.531,3.74 0.26,0.25 10 false SO 1.271,2.698 1.531,2.917 0.26,0.219 10 false EO 1.271,3.083 1.573,3.396 0.302,0.313 10 false BO 5.698,3.5 5.979,3.74 0.281,0.24 10 false SI 5.698,3.104 5.979,3.354 0.281,0.25 10 false BI 5.698,2.677 6.031,2.958 0.333,0.281 10 false EI 4.094,0.427 4.25,0.583 0.156,0.156 10 false 5 2.969,0.823 3.073,0.979 0.104,0.156 10 false 1 2.969,0.427 3.073,0.583 0.104,0.156 10 false 2 4.094,1.24 4.25,1.396 0.156,0.156 10 false 6 4.094,0.823 4.25,0.979 0.156,0.156 10 false 4 2.979,1.229 3.083,1.385 0.104,0.156 10 false 3 1.552,0.427 1.708,0.583 0.156,0.156 10 false 5 1.573,2.99 1.729,3.146 0.156,0.156 10 false 1 1.583,3.396 1.74,3.552 0.156,0.156 10 false 2 1.552,1.24 1.74,1.406 0.188,0.167 10 false 6 1.552,0.823 1.74,0.99 0.188,0.167 10 false 4 1.573,2.604 1.729,2.76 0.156,0.156 10 false 3 5.49,3.385 5.594,3.542 0.104,0.156 10 false 5 5.49,2.615 5.635,2.792 0.146,0.177 10 false 6 5.479,2.99 5.583,3.146 0.104,0.156 10 false 4 3.156,3.5 3.385,3.74 0.229,0.24 10 false SI 3.156,2.698 3.385,2.948 0.229,0.25 10 false EI 3.156,3.104 3.406,3.344 0.25,0.24 10 false BI 3.792,2.698 4.094,2.958 0.302,0.26 10 false EO 3.792,3.51 4.052,3.708 0.26,0.198 10 false SO 3.802,3.094 4.063,3.323 0.26,0.229 10 false BO 4.104,2.573 4.26,2.729 0.156,0.156 10 false 3 2.969,3.01 3.083,3.167 0.115,0.156 10 false 4 2.958,3.396 3.073,3.552 0.115,0.156 10 false 5 4.104,3.375 4.26,3.531 0.156,0.156 10 false 2 4.104,2.958 4.26,3.115 0.156,0.156 10 false 1 2.969,2.604 3.094,2.781 0.125,0.177 10 false 6 2.896,3.792 3.448,4.094 0.552,0.302 10 false B2 0.281,3.781 0.792,4.115 0.51,0.333 10 false B3 5.333,1.813 6.844,2.135 1.51,0.323 10 false Clearance Warning ECU Assembly 5.688,0.573 6.115,0.781 0.427,0.208 10 false SOF 5.698,1.365 6.156,1.615 0.458,0.25 10 false E5 5.688,0.969 6.135,1.198 0.448,0.229 10 false BOF 5.49,0.438 5.677,0.594 0.188,0.156 10 false 4 5.49,1.24 5.667,1.396 0.177,0.156 10 false 3 5.5,0.833 5.677,0.99 0.177,0.156 10 false 2 5.333,1.646 5.781,1.896 0.448,0.25 10 false E51 5.333,3.781 5.917,4.208 0.583,0.427 10 false B1 2.896,1.667 3.448,2.021 0.552,0.354 10 false B4 5.344,3.948 6.771,4.563 1.427,0.615 10 false Front Corner Ultrasonic Sensor RH 2.896,1.813 4.354,2.365 1.458,0.552 10 false Front Corner Ultrasonic Sensor LH 2.917,3.969 4.385,4.323 1.469,0.354 10 false Front Center Ultrasonic Sensor RH 0.292,3.958 1.719,4.552 1.427,0.594 10 false Front Center Ultrasonic Sensor LH

CAUTION / NOTICE / HINT

NOTICE:
·

Perform registration after replacing or removing and installing the ultrasonic sensor or clearance warning ECU assembly.

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>CALIBRATION

·

If a DTC is detected again after the repair, turn the ignition switch to ON and turn the toyota parking assist-sensor system on, and then clear the DTC.

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>DTC CHECK / CLEAR



PROCEDURE

1.VEHICLE CONDITION AND WORK DETAILS CHECK
a.

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



A

2.CHECK CONNECTOR CONNECTION CONDITION (ULTRASONIC SENSOR)

B

GO TO CALIBRATION

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>PARKING SUPPORT BRAKE SYSTEM>CALIBRATION


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.


Result:
Proceed to
NEXT



NEXT

3.CHECK FOR DTC
3.CHECK FOR DTC
a.

According to the display on the GTS, check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438

b.

According to the display on the GTS, clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
50002 438

c.

Recheck for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438

Result:
Result Proceed to
C1AE187 is not output A
C1AE187 is output B



A

END (CONNECTOR CONNECTION MALFUNCTION)

B

4.CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)
4.CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)
a.

Check that the connector is properly connected to the clearance warning ECU assembly.


Result:
Proceed to
NEXT



NEXT

5.CLEAR DTC
5.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
50002 438
Result:
Proceed to
NEXT




NEXT

6.CHECK FOR DTC
6.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438
Result:
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
C1AE187 is output F




A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

7.CHECK WIRE HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR LH)

C

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM (C1AE287))

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE287


D

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM (C1AE387))

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE387


E

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM (C1AE487))

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE487


F

8.REPLACE FRONT CORNER ULTRASONIC SENSOR LH
7.CHECK WIRE HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR LH)

Pre-procedure1

a.

Disconnect the E51 clearance warning ECU assembly connector.


b.

Disconnect the B4 front 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

Click Location & Routing(E51,B4)Location & Routing

Click Connector(E51)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Clearance Warning ECU Assembly

Click Connector(B4)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Front Corner Ultrasonic Sensor LH

E51-2 (BOF) - B4-4 (BI) Always Below 1 Ω
E51-4 (SOF) - B4-5 (SI) Always Below 1 Ω
E51-3 (E5) - B4-6 (EI) Always Below 1 Ω
E51-2 (BOF) or B4-4 (BI) - Body ground Always 10 kΩ or higher
E51-4 (SOF) or B4-5 (SI) - Body ground Always 10 kΩ or higher
E51-3 (E5) or B4-6 (EI) - Body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

8.REPLACE FRONT CORNER ULTRASONIC SENSOR LH

NG

REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR

8.REPLACE FRONT CORNER ULTRASONIC SENSOR LH
a.

Replace the front corner ultrasonic sensor LH with a new or normally functioning one.

HINT:

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>ULTRASONIC SENSOR (for Front)>REMOVAL


HINT:

To check if the ultrasonic sensor is functioning correctly, replace it with another ultrasonic sensor.


Result:
Proceed to
NEXT




NEXT

9.CLEAR DTC
9.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Clearance Warning > Clear DTCs
50002 438
Result:
Proceed to
NEXT




NEXT

10.CHECK FOR DTC
10.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438
Result:
Result Proceed to
DTCs are not output A
C1AE187 is output B




A

END (FRONT CORNER ULTRASONIC SENSOR LH WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>CLEARANCE WARNING ECU>REMOVAL