No.3 NO DETECTION SOUND/LOW VOLUME [PARKING SENSOR]

id0903z4886300

3
No detection sound/low volume
DESCRIPTION
•  Buzzer does not sound (indicator light illuminates normally) after parking sensor switch is turned on.
•  Detection sound from front parking sensor buzzer or rear parking sensor buzzer is weak.
POSSIBLE CAUSES
•  Vehicle speed signal malfunction buzzer activation circuit malfunction.
―  Open circuit in wiring harness between rear parking sensor buzzer terminal B and parking sensor control module terminal Z
―  Short to power supply in wiring harness between rear parking sensor buzzer terminal B and parking sensor control module terminal Z
―  Open circuit in wiring harness between rear parking sensor buzzer terminal A and relay block terminals 1B. (with advanced keyless entry and push button start system)
―  Open circuit in wiring harness between rear parking sensor buzzer terminal A and ignition switch terminals D. (without advanced keyless entry and push button start system)
―  Rear parking sensor buzzer malfunction
―  Front parking sensor buzzer malfunction
―  Poor contact of connectors and terminals, or bad connections
•  Buzzer volume adjustment at minimum volume.
•  Parking sensor control module malfunction.

Diagnostic Procedure

Step

Inspection

Action
1
BUZZER VOLUME ADJUSTMENT
•  Adjust the volume of the malfunctioning buzzer.
•  Is the malfunction resolved?
Yes
Troubleshooting is completed (Incorrect buzzer volume adjustment).
No
Go to the next step.
2
VERIFY MALFUNCTION SYMPTOM
•  Switch the ignition to ON.
•  Turn on the parking sensor switch.
•  Does the indicator light turn off after illuminating?
Yes
Go to the next step.
No
Go to the parking sensor symptom troubleshooting procedure “No.1 SYSTEM DOES NOT OPERATE [PARKING SENSOR]”.
3
VERIFY FRONT BUZZER
•  Is the malfunction occurring on the front side?
Yes
Replace the parking sensor control module.
(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
4
DETERMINE IF MALFUNCTION CAUSE IS REAR PARKING SENSOR BUZZER POWER SUPPLY
•  Switch the ignition to off.
•  Disconnect the rear parking buzzer sensor connector.
•  Switch the ignition to ON.
•  Measure the voltage of connector terminal A on the rear parking sensor buzzer vehicle side wiring harness.
•  Is the voltage B+?
Yes
Go to the next step.
No
•  Open circuit in wiring harness between rear parking sensor buzzer terminal A and relay block terminals 1B. (with advanced keyless entry and push button start system)
•  Open circuit in wiring harness between rear parking sensor buzzer terminal A and ignition switch terminals D.(without advanced keyless entry and push button start system)
5
REAR PARKING SENSOR BUZZER INSPECTION
•  Inspect the rear parking sensor buzzer.
•  Is the rear parking sensor buzzer normal?
Yes
Go to the next step.
No
Replace the rear parking sensor buzzer.
(See PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)
6
INSPECT IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY IN REAR PARKING SENSOR BUZZER DRIVE CIRCUIT
•  Switch the ignition to off.
•  Disconnect the parking sensor control module and parking sensor buzzer connectors.
•  Switch the ignition to ON.
•  Measure the voltage of connector terminal B on the rear parking sensor buzzer vehicle side wiring harness.
•  Is the voltage B+?
Yes
Repair for a short to the wiring harness power supply.
No
Go to the next step.
7
INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN REAR PARKING SENSOR BUZZER DRIVE CIRCUIT
•  Leave the parking sensor control module and rear parking sensor buzzer connectors disconnected.
•  Verify the continuity of the wiring harnesses between the parking sensor control module vehicle side wiring harness terminal Z and the rear parking sensor buzzer vehicle side wiring harness connector terminal B.
•  Is there continuity?
Yes
Replace the parking sensor control module.
(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair for an open circuit in the wiring harness.