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

PARK ASSIST / MONITORING  TOYOTA PARKING ASSIST-SENSOR SYSTEM  No. 2 Clearance Warning Buzzer Circuit  


DESCRIPTION

This circuit consists of the No. 2 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzers using a sound pattern that changes depending on the distance to the obstacle.

WIRING DIAGRAM

E429359E04
5.563,0.469 6.198,0.75 0.635,0.281 10 false BBZ 5.302,0.385 5.667,0.552 0.365,0.167 10 false 26 5.563,1.271 5.854,1.448 0.292,0.177 10 false ER 5.365,1.729 5.917,2.052 0.552,0.323 10 false E51 0.792,1.583 1.25,1.854 0.458,0.271 10 false K14 0.781,1.74 2.354,2.271 1.573,0.531 10 false No. 2 Clearance Warning Buzzer 5.365,1.885 6.854,2.458 1.49,0.573 10 false Clearance Warning ECU Assembly 5.271,1.198 5.615,1.365 0.344,0.167 10 false 25 2.063,0.406 2.167,0.573 0.104,0.167 10 false 1 2.063,1.188 2.167,1.354 0.104,0.167 10 false 2 1.781,0.479 2.063,0.646 0.281,0.167 10 false Z+ 1.781,1.292 2.063,1.458 0.281,0.167 10 false Z-

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


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (REAR BUZZER)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Clearance Warning / Active Test.


e.

Check that the rear buzzer operates by performing the Active Test.

Body Electrical > Clearance Warning > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Rear Buzzer No. 2 clearance warning buzzer OFF or ON Confirm that the vehicle is stopped and the ignition switch is ON
Body Electrical > Clearance Warning > Active Test
Tester Display
Rear Buzzer
50004 438 2
OK:

The No. 2 clearance warning buzzer sounds.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>TOYOTA PARKING ASSIST-SENSOR SYSTEM>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 2 CLEARANCE WARNING BUZZER)
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 2 CLEARANCE WARNING BUZZER)
a.

Disconnect the E51 clearance warning ECU assembly connector.


b.

Disconnect the K14 No. 2 clearance warning buzzer connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(E51,K14)Location & Routing

Click Connector(E51)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Clearance Warning ECU Assembly

Click Connector(K14)Body>Floor Wire>No. 2 Clearance Warning Buzzer

E51-26 (BBZ) - K14-1 (Z+) Always Below 1 Ω
E51-25 (ER) - K14-2 (Z-) Always Below 1 Ω
E51-26 (BBZ) or K14-1 (Z+) - Body ground Always 10 kΩ or higher
E51-25 (ER) or K14-2 (Z-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.REPLACE NO. 2 CLEARANCE WARNING BUZZER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.REPLACE NO. 2 CLEARANCE WARNING BUZZER
a.

Replace the No. 2 clearance warning buzzer with a new or known good one.

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>CLEARANCE WARNING BUZZER (for Rear)>REMOVAL


Result:
Proceed to
NEXT



NEXT

4.PERFORM ACTIVE TEST USING GTS (REAR BUZZER)
4.PERFORM ACTIVE TEST USING GTS (REAR BUZZER)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Clearance Warning / Active Test.


e.

Check that the rear buzzer operates by performing the Active Test.

Body Electrical > Clearance Warning > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Rear Buzzer No. 2 clearance warning buzzer OFF or ON Confirm that the vehicle is stopped and the ignition switch is ON
Body Electrical > Clearance Warning > Active Test
Tester Display
Rear Buzzer
50004 438 2

OK:

The No. 2 clearance warning buzzer sounds.


Result:
Proceed to
OK
NG



OK

END (NO. 2 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

NG

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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