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1
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VERIFY IF MALFUNCTION CAUSE IS OTHER THAN OPERATION PERMISSION CONDITION
• Verify the parking sensor system operation by an obstruction approaching the rear ultrasonic sensor /rear corner ultrasonic sensor with all the following conditions met.
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― Ignition switched ON (engine on)
― Selector lever is in R position (ATX)
― Vehicle speed 10 km/h or less
• Does the parking sensor system operate correctly?
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Yes
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System is normal. (Explain the parking sensor system operation conditions to the customer.)
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No
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Go to the next step.
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2
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INSPECT PARKING ASSIST UNIT POWER SUPPLY
• Switch the ignition ON (engine off or on).
• Measure the voltage at parking assist unit terminal U.
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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• Refer to the wiring diagram and verify whether or not there is a mid-connector between IGNITION relay terminal C and parking assist unit terminal U.
If there is a mid-connector
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― 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 or short to ground.
― Repair or replace the wiring harness which has a malfunction.
If there is no mid-connector
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― Repair or replace the wiring harness which has a malfunction.
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3
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ADJUST BUZZER VOLUME
• Adjust the buzzer volume.
• Was the malfunction corrected?
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Yes
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Inspection completed (buzzer volume adjustment malfunction).
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No
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Go to the next step.
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4
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INSPECT PARKING ASSIST UNIT GROUND CIRCUIT
• Switch the ignition off.
• Disconnect the negative battery cable.
• Disconnect the parking assist unit connector.
• Verify the continuity between connector terminal A on parking assist unit vehicle side and body ground.
• Is there continuity?
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Yes
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Inspect and repair the ground point for looseness, disengagement, or lifting.
Repair or replace the wiring harness.
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No
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Go to the next step.
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5
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INSPECT WIRING HARNESS BETWEEN PARKING ASSIST UNIT AND PARKING SENSOR BUZZER FOR OPEN CIRCUIT
• Disconnect the connectors of the parking sensor buzzer and parking assist unit.
• Inspect for continuity between the following wiring harnesses:
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― Parking assist unit terminal Y and parking sensor buzzer terminal B
― Parking assist unit terminal Z and parking sensor buzzer terminal A
• Is there continuity?
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Yes
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Go to the next step.
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No
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• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:
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― Parking assist unit terminal Y and parking sensor buzzer terminal B
― Parking assist unit terminal Z and parking sensor buzzer terminal A
If there is a mid-connector
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― 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
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― Repair or replace the wiring harness which has a malfunction.
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6
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INSPECT WIRING HARNESS BETWEEN PARKING ASSIST UNIT AND PARKING SENSOR BUZZER FOR SHORT TO GROUND
• Inspect for continuity between the following wiring harnesses:
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― Parking assist unit terminal Y and ground
― Parking assist unit terminal Z and ground
• Is there continuity?
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Yes
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• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:
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― Parking assist unit terminal Y and parking sensor buzzer terminal B
― Parking assist unit terminal Z and parking sensor buzzer terminal A
If there is a mid-connector
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― 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
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― Repair or replace the wiring harness which has a malfunction.
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No
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Go to the next step.
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7
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INSPECT WIRING HARNESS BETWEEN PARKING ASSIST UNIT AND ELECTRICAL SUPPLY UNIT (ESU) FOR OPEN CIRCUIT
• Disconnect the connectors of the electrical supply unit (ESU).
• Inspect for continuity between the following wiring harnesses:
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― Parking assist unit terminal N and electrical supply unit (ESU) terminal 2Q
• Is there continuity?
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Yes
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Go to the next step.
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No
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• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:
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― Parking assist unit terminal N and electrical supply unit (ESU) 2Q
If there is a mid-connector
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― 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
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― Repair or replace the wiring harness which has a malfunction.
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8
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INSPECT WIRING HARNESS BETWEEN PARKING ASSIST UNIT AND ELECTRICAL SUPPLY UNIT (ESU) FOR SHORT TO GROUND
• Inspect for continuity between the following wiring harnesses:
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― Parking assist unit terminal N and ground
• Is there continuity?
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Yes
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• Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses:
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― Parking assist unit terminal N and electrical supply unit (ESU) terminal 2Q
If there is a mid-connector
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― 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
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― Repair or replace the wiring harness which has a malfunction.
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No
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Go to the next step.
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9
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DETERMINE IF MALFUNCTION CAUSE IS PARKING SENSOR BUZZER OR PARKING ASSIST UNIT
• Inspect the parking sensor buzzer.
• Is the parking sensor buzzer normal?
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Yes
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Replace the parking assist unit.
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No
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Replace the parking sensor buzzer.
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