No.1 SYSTEM DOES NOT OPERATE [PARKING SENSOR]

id0903z4886500

1

System does not operate
DESCRIPTION
Buzzer does not sound and indicator light does not illuminate after parking sensor switch is on
POSSIBLE CAUSES
•  Parking sensor control module power supply related malfunction
―  Open circuit in wiring harness between relay block terminals 1B and parking sensor switch terminal F (with advanced keyless entry and push button start system)
―  Open circuit in wiring harness between ignition switch terminals D and parking sensor switch terminal F (without advanced keyless entry and push button start system)
―  Short to ground in the wiring harness between relay block terminals 1B and parking sensor switch terminal F (with advanced keyless entry and push button start system)
―  Short to ground in the wiring harness between ignition switch terminals D and parking sensor switch terminal F (without advanced keyless entry and push button start system)
―  Parking sensor switch malfunction (stuck open)
―  Open circuit in wiring harness between parking sensor switch terminal H and parking sensor control module terminal U
•  Ground related malfunction in parking sensor control module
―  Short circuit between parking sensor control module terminal Q and body ground
―  Ground point lifting, looseness
•  Parking sensor control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY MALFUNCTION SYMPTOM
•  Set up the vehicle according to the following conditions:
―  Switch the ignition to ON
―  R position (ATX)
―  Reverse gear (MTX)
•  Turn on the parking sensor switch.
•  Do the parking sensor buzzers for the front and rear emit sound?
Yes
Activate both the front and rear parking sensor buzzers:
•  System is normal
Activate the front parking sensor buzzer:
•  Inspect the reverse switch (MTX).
•  Inspect the inhibitor switch (ATX).
Activate only the rear parking sensor buzzer:
•  Replace the parking sensor control module (malfunction with front parking sensor buzzer, front parking sensor buzzer activation circuit).
No
Go to the next step.
2
VERIFY IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY WIRING HARNESS
•  Verify the condition of the METER (15A) fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
•  Inspect and repair for the following short circuits:
―  Between relay block terminals 1B and parking sensor switch terminal F (with advanced keyless entry and push button start system)
―  Between ignition switch terminals D and parking sensor switch terminal F (without advanced keyless entry and push button start system)
―  Between parking sensor switch terminal F and parking sensor control module terminal U
―  Between METER (15A) and each part receiving power supply
•  After repair, replace the fuse.
3
INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT TO POWER SUPPLY RELATED WIRING HARNESS
•  Switch the ignition to off.
•  Disconnect the parking sensor control module connector.
•  Switch the ignition to ON.
•  Turn on the parking sensor switch.
•  Measure the voltage of connector terminal U on the parking sensor control module vehicle wiring harness side.
•  Is the voltage B+?
Yes
Go to Step 6.
No
Go to the next step.
4
PARKING SENSOR SWITCH INSPECTION
•  Inspect the parking sensor switch.
•  Is the parking sensor switch normal?
Yes
Go to the next step.
No
Replace the parking sensor switch.
(See PARKING SENSOR SWITCH REMOVAL/INSTALLATION.)
5
SPECIFY LOCATION OF POWER SUPPLY RELATED OPEN CIRCUIT
•  Leave the parking sensor control module and parking sensor switch connectors disconnected.
•  Verify the continuity of the wiring harnesses between the parking sensor control module vehicle side wiring harness terminal U and the parking sensor switch vehicle side wiring harness connector terminal H.
•  Is there continuity?
Yes
Repair the open circuit in the wiring harness between relay block terminals 1B and parking sensor switch terminal F. (with advanced keyless entry and push button start system)
Repair the open circuit in the wiring harness between ignition switch terminals D and parking sensor switch terminal F. (without advanced keyless entry and push button start system)
No
Repair the short circuit in the wiring harness between parking sensor control module terminal U and parking sensor switch terminal H.
6
VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN PARKING SENSOR CONTROL MODULE GROUND CIRCUIT
•  Leave the parking sensor control module connector disconnected.
•  Verify if there is continuity between the parking sensor control module vehicle side connector terminal Q and body ground.
•  Is there continuity?
Yes
Replace the parking sensor control module.
(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair the open circuit in the wiring harness.
Verify the connection condition of the ground point, and repair.