PARKING SENSOR BUZZER CONTINUES SOUNDING [PARKING SENSOR SYSTEM]

id0903n7200600

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

Description
PARKING SENSOR BUZZER CONTINUES SOUNDING
•  Buzzer sound from the front parking sensor buzzer or parking sensor buzzer does not stop.
Possible Causes
•  Front parking sensor buzzer connector or terminal malfunction
•  Parking assist unit connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
?  Front parking sensor buzzer terminal B—Parking assist unit terminal Y
?  Front parking sensor buzzer terminal A—Parking assist unit terminal Z
•  Short to power supply in wiring harness between the following terminals:
?  Front parking sensor buzzer terminal B—Parking assist unit terminal Y
?  Front parking sensor buzzer terminal A—Parking assist unit terminal Z
•  Front parking sensor buzzer malfunction
•  Rear parking sensor buzzer connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
?  Rear parking sensor buzzer terminal B—Parking assist unit terminal W
?  Rear parking sensor buzzer terminal A—Parking assist unit terminal X
•  Short to power supply in wiring harness between the following terminals:
?  Rear parking sensor buzzer terminal B—Parking assist unit terminal W
?  Rear parking sensor buzzer terminal A—Parking assist unit terminal X
•  Rear parking sensor buzzer malfunction
•  Parking assist unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY ALL SYSTEM DTCs
•  Switch the ignition off.
•  Switch the ignition ON (engine off or on) and wait for 10 s or more.
•  Perform a CMDTC self-test using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PARKING ASSIST UNIT].)
No
Go to the next step.
2
DETERMINE IF MALFUNCTION CAUSE IS FRONT PARKING SENSOR BUZZER OR REAR PARKING SENSOR BUZZER SYSTEM
•  Verify if the activated buzzer is front parking sensor buzzer or rear parking sensor buzzer.
•  Is the front parking sensor buzzer activated?
Yes
Go to the next step.
No
Go to Step 8.
3
INSPECT FRONT PARKING SENSOR BUZZER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front parking sensor buzzer connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector.
4
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Disconnect the parking assist unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector.
5
INSPECT FRONT PARKING SENSOR BUZZER CIRCUIT FOR SHORT TO GROUND
•  Verify that the front parking sensor buzzer and parking assist unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Front parking sensor buzzer terminal B
?  Front parking sensor buzzer terminal A
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Front parking sensor buzzer terminal B—Parking assist unit terminal Y
•  Front parking sensor buzzer terminal A—Parking assist unit terminal Z
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
No
Go to the next step.
6
INSPECT PARKING SENSOR BUZZER CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the front parking sensor buzzer and parking assist unit connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
?  Front parking sensor buzzer terminal B
?  Front parking sensor buzzer terminal A
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Front parking sensor buzzer terminal B—Parking assist unit terminal Y
•  Front parking sensor buzzer terminal A—Parking assist unit terminal Z
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
7
INSPECT FRONT PARKING SENSOR BUZZER
•  Inspect the front parking sensor buzzer.
•  Is the front parking sensor buzzer normal?
Yes
Replace the parking assist unit.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Replace the front parking sensor buzzer.
(See FRONT PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)
8
INSPECT REAR PARKING SENSOR BUZZER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the rear parking sensor buzzer connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector.
9
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Disconnect the parking assist unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector.
10
INSPECT PARKING SENSOR BUZZER CIRCUIT FOR SHORT TO GROUND
•  Verify that the rear parking sensor buzzer and parking assist unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Rear parking sensor buzzer terminal B
?  Rear parking sensor buzzer terminal A
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Rear parking sensor buzzer terminal B—Parking assist unit terminal W
•  Rear parking sensor buzzer terminal A—Parking assist unit terminal X
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
No
Go to the next step.
11
INSPECT PARKING SENSOR BUZZER CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the rear parking sensor buzzer and parking assist unit connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
?  Rear parking sensor buzzer terminal B
?  Rear parking sensor buzzer terminal A
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Rear parking sensor buzzer terminal B—Parking assist unit terminal W
•  Rear parking sensor buzzer terminal A—Parking assist unit terminal X
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
12
INSPECT REAR PARKING SENSOR BUZZER
•  Inspect the rear parking sensor buzzer.
•  Is the rear parking sensor buzzer normal?
Yes
Replace the parking assist unit.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Replace the rear parking sensor buzzer.
(See REAR PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)