NO DETECTION SOUND/LOW VOLUME [PARKING SENSOR]

id0903z4829500

Note

• If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [PARKING SENSOR] malfunction diagnosis according to the troubleshooting procedure.

Description

• Buzzer does not sound (parking sensor indicator illumination is normal) after turning the parking sensor switch/indicator on.

• The volume of the detection sound from the buzzer decreases.

Possible malfunction

• Volume adjustment of buzzer is at minimum

• Buzzer circuit malfunction

Front

― Open or short circuit in wiring harness between parking sensor control module terminal Y and front parking sensor buzzer terminal B

― Open circuit in wiring harness between parking sensor control module terminal Z and front parking sensor buzzer terminal A

Rear

― Open or short circuit in wiring harness between parking sensor control module terminal W and rear parking sensor buzzer terminal B

― Open circuit in wiring harness between parking sensor control module terminal X and rear parking sensor buzzer terminal A

• Parking sensor buzzer malfunction

• Parking sensor control module malfunction

Diagnostic Procedure

Step

Inspection

Action

1

ADJUST BUZZER VOLUME

•  Adjust the buzzer volume.
(See BEEP SOUND ADJUSTMENT.)

•  Was the malfunction corrected?

Yes

Inspection completed (buzzer volume adjustment malfunction).

No

Go to the next step.

2

INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR OPEN CIRCUIT

•  Switch the ignition off (LOCK).

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

•  Disconnect the connectors of the parking sensor buzzer and parking sensor control module.

•  Inspect for continuity between the following wiring harnesses:

Front

―  Parking sensor control module terminal Y and front parking sensor buzzer terminal B

―  Parking sensor control module terminal Z and front parking sensor buzzer terminal A

Rear

―  Parking sensor control module terminal W and rear parking sensor buzzer terminal B

―  Parking sensor control module terminal X and rear parking sensor buzzer terminal A

•  Is there continuity?

Yes

Go to the next step.

No

•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:

Front

―  Parking sensor control module terminal Y and front parking sensor buzzer terminal B

―  Parking sensor control module terminal Z and front parking sensor buzzer terminal A

Rear

―  Parking sensor control module terminal W and rear parking sensor buzzer terminal B

―  Parking sensor control module terminal X and rear parking sensor buzzer terminal A

If there is a mid-connector

―  Determine the malfunctioning part by inspecting the mid-connector and the terminal for corrosion, damage, or pin disconnection, and the mid-wiring harness for a open circuit.

―  Repair or replace the wiring harness which has a malfunction.

If there is no mid-connector

―  Repair or replace the wiring harness which has a malfunction.

3

INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR SHORT TO GROUND

•  Inspect for continuity between the following wiring harnesses:

Front

―  Parking sensor control module terminal Y and front parking sensor buzzer terminal B

Rear

―  Parking sensor control module terminal W and rear parking sensor buzzer terminal B

•  Is there continuity?

Yes

•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:

Front

―  Parking sensor control module terminal Y and front parking sensor buzzer terminal B

―  Parking sensor control module terminal Z and front parking sensor buzzer terminal A

Rear

―  Parking sensor control module terminal W and rear parking sensor buzzer terminal B

―  Parking sensor control module terminal X and rear parking sensor buzzer terminal A

If there is a mid-connector

―  Determine the malfunctioning part by inspecting the mid-connector and the terminal for corrosion, damage, or pin disconnection, and the mid-wiring harness for a short to ground.

―  Repair or replace the wiring harness which has a malfunction.

If there is no mid-connector

―  Repair or replace the wiring harness which has a malfunction.

No

Go to the next step.

4

DETERMINE IF MALFUNCTION CAUSE IS PARKING SENSOR BUZZER OR PARKING SENSOR CONTROL MODULE

•  Inspect the parking sensor buzzer.
(See FRONT PARKING SENSOR BUZZER INSPECTION.)

(See REAR PARKING SENSOR BUZZER INSPECTION.)

•  Is the parking sensor buzzer normal?

Yes

Replace the parking sensor control module.

(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)

No

Replace the parking sensor buzzer.

(See FRONT PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)

(See REAR PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)

Step	Inspection		Action
1	ADJUST BUZZER VOLUME • Adjust the buzzer volume. (See BEEP SOUND ADJUSTMENT.) • Was the malfunction corrected?	Yes	Inspection completed (buzzer volume adjustment malfunction).
1		No	Go to the next step.
2	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR OPEN CIRCUIT • Switch the ignition off (LOCK). • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) • Disconnect the connectors of the parking sensor buzzer and parking sensor control module. • Inspect for continuity between the following wiring harnesses: Front ― Parking sensor control module terminal Y and front parking sensor buzzer terminal B ― Parking sensor control module terminal Z and front parking sensor buzzer terminal A Rear ― Parking sensor control module terminal W and rear parking sensor buzzer terminal B ― Parking sensor control module terminal X and rear parking sensor buzzer terminal A • Is there continuity?	Yes	Go to the next step.
2		No	• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: Front ― Parking sensor control module terminal Y and front parking sensor buzzer terminal B ― Parking sensor control module terminal Z and front parking sensor buzzer terminal A Rear ― Parking sensor control module terminal W and rear parking sensor buzzer terminal B ― Parking sensor control module terminal X and rear parking sensor buzzer terminal A If there is a mid-connector ― Determine the malfunctioning part by inspecting the mid-connector and the terminal for corrosion, damage, or pin disconnection, and the mid-wiring harness for a open circuit. ― Repair or replace the wiring harness which has a malfunction. If there is no mid-connector ― Repair or replace the wiring harness which has a malfunction.
3	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR SHORT TO GROUND • Inspect for continuity between the following wiring harnesses: Front ― Parking sensor control module terminal Y and front parking sensor buzzer terminal B Rear ― Parking sensor control module terminal W and rear parking sensor buzzer terminal B • Is there continuity?	Yes	• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: Front ― Parking sensor control module terminal Y and front parking sensor buzzer terminal B ― Parking sensor control module terminal Z and front parking sensor buzzer terminal A Rear ― Parking sensor control module terminal W and rear parking sensor buzzer terminal B ― Parking sensor control module terminal X and rear parking sensor buzzer terminal A If there is a mid-connector ― Determine the malfunctioning part by inspecting the mid-connector and the terminal for corrosion, damage, or pin disconnection, and the mid-wiring harness for a short to ground. ― Repair or replace the wiring harness which has a malfunction. If there is no mid-connector ― Repair or replace the wiring harness which has a malfunction.
3		No	Go to the next step.
4	DETERMINE IF MALFUNCTION CAUSE IS PARKING SENSOR BUZZER OR PARKING SENSOR CONTROL MODULE • Inspect the parking sensor buzzer. (See FRONT PARKING SENSOR BUZZER INSPECTION.) (See REAR PARKING SENSOR BUZZER INSPECTION.) • Is the parking sensor buzzer normal?	Yes	Replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
4		No	Replace the parking sensor buzzer. (See FRONT PARKING SENSOR BUZZER REMOVAL/INSTALLATION.) (See REAR PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)