RM36D0EC _56 Audio / Visual / Telematics _083082 PARK ASSIST / MONITORING _0711991 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 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
·

Front corner ultrasonic sensor (FL sensor)

·

Harness or connector

·

Clearance warning ECU assembly



WIRING DIAGRAM

E542286E01
3.854,0.563 4.094,0.813 0.24,0.25 10 false BI 3.854,1.354 4.042,1.542 0.188,0.188 10 false EI 3.854,0.917 4.083,1.146 0.229,0.229 10 false SI 3.167,0.958 3.469,1.177 0.302,0.219 10 false SO 3.156,1.365 3.458,1.594 0.302,0.229 10 false EO 3.146,0.521 3.479,0.781 0.333,0.26 10 false BO 1.313,0.573 1.583,0.792 0.271,0.219 10 false BI 1.323,1.365 1.594,1.604 0.271,0.24 10 false EI 1.302,0.99 1.583,1.24 0.281,0.25 10 false SI 1.229,3.042 1.49,3.292 0.26,0.25 10 false SO 1.208,3.49 1.469,3.708 0.26,0.219 10 false EO 1.25,2.667 1.552,2.979 0.302,0.313 10 false BO 5.688,3.083 5.969,3.323 0.281,0.24 10 false SI 5.698,2.688 5.979,2.938 0.281,0.25 10 false BI 5.698,3.49 6.031,3.771 0.333,0.281 10 false EI 4.115,0.823 4.271,0.979 0.156,0.156 10 false 4 2.979,0.458 3.083,0.615 0.104,0.156 10 false 6 2.969,0.823 3.073,0.979 0.104,0.156 10 false 1 4.115,1.24 4.271,1.396 0.156,0.156 10 false 2 4.104,0.406 4.26,0.563 0.156,0.156 10 false 5 2.979,1.229 3.083,1.385 0.104,0.156 10 false 3 1.573,0.823 1.729,0.979 0.156,0.156 10 false 4 1.604,2.563 1.76,2.719 0.156,0.156 10 false 6 1.583,2.938 1.74,3.094 0.156,0.156 10 false 1 1.552,1.24 1.74,1.406 0.188,0.167 10 false 2 1.573,0.427 1.76,0.594 0.188,0.167 10 false 5 1.594,3.354 1.75,3.51 0.156,0.156 10 false 3 5.49,2.979 5.594,3.135 0.104,0.156 10 false 4 5.49,3.375 5.635,3.552 0.146,0.177 10 false 2 5.479,2.594 5.583,2.75 0.104,0.156 10 false 5 3.156,3.073 3.385,3.313 0.229,0.24 10 false SI 3.156,3.458 3.385,3.708 0.229,0.25 10 false EI 3.167,2.677 3.417,2.917 0.25,0.24 10 false BI 3.781,3.49 4.083,3.75 0.302,0.26 10 false EO 3.802,3.073 4.063,3.271 0.26,0.198 10 false SO 3.802,2.698 4.063,2.927 0.26,0.229 10 false BO 4.104,3.396 4.26,3.552 0.156,0.156 10 false 3 2.979,2.594 3.094,2.75 0.115,0.156 10 false 5 2.958,2.979 3.073,3.135 0.115,0.156 10 false 4 4.104,2.99 4.26,3.146 0.156,0.156 10 false 1 4.125,2.594 4.281,2.75 0.156,0.156 10 false 6 2.948,3.365 3.073,3.542 0.125,0.177 10 false 2 2.896,3.802 3.25,4 0.354,0.198 10 false B21 0.281,3.781 0.573,3.948 0.292,0.167 10 false B22 5.333,1.813 6.844,2.135 1.51,0.323 10 false Clearance Warning ECU Assembly 5.698,0.927 6.125,1.135 0.427,0.208 10 false SOF 5.698,1.365 6.156,1.615 0.458,0.25 10 false E5 5.688,0.552 6.135,0.781 0.448,0.229 10 false BOF 5.458,1.25 5.646,1.406 0.188,0.156 10 false 15 5.458,0.833 5.635,0.99 0.177,0.156 10 false 37 5.448,0.438 5.625,0.594 0.177,0.156 10 false 14 5.333,1.646 5.792,1.823 0.458,0.177 10 false G135 5.333,3.781 5.698,3.948 0.365,0.167 10 false B19 2.667,1.646 3.052,1.885 0.385,0.24 10 false B20 5.344,3.948 6.813,4.302 1.469,0.354 10 false Front Corner Ultrasonic Sensor (FR Sensor) 2.667,1.813 4.583,2.156 1.917,0.344 10 false Front Corner Ultrasonic Sensor (FL Sensor) 2.917,3.969 4.385,4.344 1.469,0.375 10 false Front Center Ultrasonic Sensor (FRC Sensor) 0.292,3.958 1.74,4.365 1.448,0.406 10 false Front Center Ultrasonic Sensor (FLC Sensor)

CAUTION / NOTICE / HINT

NOTICE:

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.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

2.CLEAR DTC
2.CLEAR DTC
a.

Clear the DTCs.

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

Body Electrical > Clearance Warning > Clear DTCs
50002 438

Result:
Proceed to
NEXT



NEXT

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

Check for DTCs.

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

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.

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

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.

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

Body Electrical > Clearance Warning > Trouble Codes
50001 438

Result:
Result Proceed to
DTCs are not output A
C1AE487 is output B
C1AE387 and C1AE487 is output C
C1AE287, C1AE387 and C1AE487 is output D
C1AE187, C1AE287, C1AE387 and C1AE487 is output E
Only 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

GO TO DTC (C1AE487)

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


C

GO TO DTC (C1AE387)

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


D

GO TO DTC (C1AE287)

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


E

7.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR [FL SENSOR])

F

8.REPLACE FRONT CORNER ULTRASONIC SENSOR (FL SENSOR)
7.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR [FL SENSOR])
a.

Disconnect the G135 clearance warning ECU assembly connector.


b.

Disconnect the B16 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
G135-14 (BOF) - B16-5 (BI) Always Below 1 Ω
G135-37 (SOF) - B16-4 (SI) Always Below 1 Ω
G135-15 (E5) - B16-2 (EI) Always Below 1 Ω
G135-14 (BOF) or B16-5 (BI) - Body ground Always 10 kΩ or higher
G135-37 (SOF) or B16-4 (SI) - Body ground Always 10 kΩ or higher
G135-15 (E5) or B16-2 (EI) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.REPLACE FRONT CORNER ULTRASONIC SENSOR (FL SENSOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.REPLACE FRONT CORNER ULTRASONIC SENSOR (FL SENSOR)
a.

Replace the front corner ultrasonic sensor (FL sensor) with a known good one.

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

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



NEXT

9.CLEAR DTC
9.CLEAR DTC
a.

Clear the DTCs.

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

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.

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

Body Electrical > Clearance Warning > Trouble Codes
50001 438

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



A

END (FRONT CORNER ULTRASONIC SENSOR [FL SENSOR] WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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