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 IG 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 IG 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.