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

PARK ASSIST / MONITORING  TOYOTA PARKING ASSIST-SENSOR SYSTEM  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
·

Rear center ultrasonic sensor LH

·

Harness or connector

·

Clearance warning ECU assembly


Clearance Warning B

WIRING DIAGRAM

E410435E11
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 2.885,3.792 3.156,3.979 0.271,0.188 10 false S2 0.302,3.781 0.625,3.99 0.323,0.208 10 false S3 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 SOR 5.698,1.365 6.156,1.615 0.458,0.25 10 false E1 5.688,0.969 6.135,1.198 0.448,0.229 10 false BOR 5.448,0.438 5.74,0.677 0.292,0.24 10 false 21 5.448,1.24 5.708,1.427 0.26,0.188 10 false 20 5.448,0.833 5.677,1.031 0.229,0.198 10 false 19 5.333,1.646 5.625,1.813 0.292,0.167 10 false E51 5.333,3.781 5.667,4.021 0.333,0.24 10 false S1 2.938,1.656 3.281,1.875 0.344,0.219 10 false S4 5.344,3.948 6.813,4.302 1.469,0.354 10 false Rear Corner Ultrasonic Sensor RH 2.917,1.813 4.313,2.5 1.396,0.688 10 false Rear Corner Ultrasonic Sensor LH 2.906,3.969 4.313,4.521 1.406,0.552 10 false Rear Center Ultrasonic Sensor RH 0.292,3.969 1.74,4.656 1.448,0.688 10 false Rear 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

·

If C1AE696 is output at the same time, check C1AE696 first.

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE696



PROCEDURE

1.CHECK DTC
a.

If DTC C1AE696 is output, perform troubleshooting for DTC C1AE696 first.

Body Electrical > Clearance Warning > Trouble Codes
50001 438
Result:
Result Proceed to
C1AE696 is not output A
C1AE696 is output B




A

2.VEHICLE CONDITION AND WORK DETAILS CHECK

B

GO TO C1AE696

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE696


2.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

3.CHECK CONNECTOR CONNECTION CONDITION (ULTRASONIC SENSOR)

B

GO TO CALIBRATION

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


Result:
Proceed to
NEXT



NEXT

4.CHECK FOR DTC
4.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
C1AE787 is not output A
C1AE787 is output B



A

END (CONNECTOR CONNECTION MALFUNCTION)

B

5.CHECK CONNECTOR CONNECTION CONDITION (CLEARANCE WARNING ECU ASSEMBLY)
5.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

6.CLEAR DTC
6.CLEAR DTC
a.

Clear the DTCs.

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




NEXT

7.CHECK FOR DTC
7.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438
Result:
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

USE SIMULATION METHOD TO CHECK

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


B

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM [C1AE687])

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE687


C

8.CHECK WIRE HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR LH - REAR CORNER ULTRASONIC SENSOR LH)

D

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM (C1AE887))

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE887


E

GO TO CORRESPONDING FLOWCHART (TOYOTA PARKING ASSIST-SENSOR SYSTEM (C1AE987))

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>C1AE987


F

9.REPLACE REAR CENTER ULTRASONIC SENSOR LH
8.CHECK WIRE HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR LH - REAR CORNER ULTRASONIC SENSOR LH)

Pre-procedure1

a.

Disconnect the S3 rear center ultrasonic sensor LH connector.


b.

Disconnect the S4 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

Click Location & Routing(S4,S3)Location & Routing

Click Connector(S4)Body>No. 2 Luggage Room Wire / No. 3 Luggage Room Wire>Rear Corner Ultrasonic Sensor LH

Click Connector(S3)Body>No. 2 Luggage Room Wire / No. 3 Luggage Room Wire>Rear Center Ultrasonic Sensor LH

S4-1 (BO) - S3-4 (BI) Always Below 1 Ω
S4-2 (SO) - S3-5 (SI) Always Below 1 Ω
S4-3 (EO) - S3-6 (EI) Always Below 1 Ω
S4-1 (BO) or S3-4 (BI) - Body ground Always 10 kΩ or higher
S4-2 (SO) or S3-5 (SI) - Body ground Always 10 kΩ or higher
S4-3 (EO) or S3-6 (EI) - Body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

9.REPLACE REAR CENTER ULTRASONIC SENSOR LH

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:

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

10.CLEAR DTC
10.CLEAR DTC
a.

Clear the DTCs.

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




NEXT

11.CHECK FOR DTC
11.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Clearance Warning > Trouble Codes
50001 438
Result:
Result Proceed to
DTCs are not output A
C1AE787 is output B




A

END (REAR CENTER ULTRASONIC SENSOR LH WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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