SYSTEM DOES NOT OPERATE [PARKING SENSOR]

id0903z4829300

Note

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

Description	Buzzer does not sound after ignition is switched ON and the selector lever (AT)/Shift lever (MT) is in the R position.
Possible Causes	•  Parking sensor control module power supply malfunction ―  Open circuit in wiring harness between IG1 relay and parking sensor control module terminal W ―  Short to ground in wiring harness between IG1 relay and parking sensor control module terminal W ―  C/U IG1 15 A fuse damage, burnt out •  Malfunction in parking sensor control module ground ―  Open circuit in wiring harness between parking sensor control module terminal A and body ground ―  Ground point lifting or loosening •  Volume adjustment of buzzer is at minimum •  Buzzer circuit malfunction ―  Open or short circuit in wiring harness between parking sensor control module terminal R and parking sensor buzzer terminal B ―  Open or short circuit in wiring harness between parking sensor control module terminal T and parking sensor buzzer terminal A •  R position (AT)/reverse position (MT) signal malfunction ―  Open or short circuit in wiring harness between parking sensor control module terminal N and electrical supply unit (ESU) terminal 2Q •  Parking sensor buzzer malfunction •  Parking sensor control module malfunction •  Customer misunderstanding

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY IF MALFUNCTION CAUSE IS OTHER THAN OPERATION PERMISSION CONDITION •  Verify the parking sensor system operation by an obstruction approaching the ultrasonic sensor/corner ultrasonic sensor with all the following conditions met. ―  Ignition switched ON (engine on) ―  Selector lever is in R position (AT) ―  Shift lever is in reverse position (MT) ―  Vehicle speed 10 km/h or less •  Does the parking sensor system operate correctly?	Yes	System is normal. (Explain the parking sensor system operation conditions to the customer.)
		No	Go to the next step.
2	INSPECT PARKING SENSOR CONTROL MODULE POWER SUPPLY •  Switch the ignition ON (engine off or on). •  Measure the voltage at parking sensor control module terminal W. •  Is the voltage B+?	Yes	Go to the next step.
		No	•  Inspect the C/U IG1 15 A fuse. If the fuse is burned out: •  Inspect and repair the wiring harness between the C/U IG1 15 A fuse and parking sensor control module terminal W for a short circuit to the ground system. If the fuse is not damaged or burned out: •  Refer to the wiring diagram and verify whether or not there is a mid-connector between IG relay terminal C and parking sensor control module terminal W. If there is a mid-connector •  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 •  Repair or replace the wiring harness which has a malfunction.
3	ADJUST BUZZER VOLUME •  Adjust the buzzer volume. (See BEEP SOUND ADJUSTMENT.) •  Was the malfunction corrected?	Yes	Inspection completed (buzzer volume adjustment malfunction).
		No	Go to the next step.
4	INSPECT PARKING SENSOR CONTROL MODULE GROUND CIRCUIT •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Disconnect the parking sensor control module connector. •  Verify the continuity between connector terminal A on parking sensor control module vehicle side and body ground. •  Is there continuity?	Yes	Inspect and repair the ground point for looseness, disengagement, or lifting. Repair or replace the wiring harness.
		No	Go to the next step.
5	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR OPEN CIRCUIT •  Disconnect the connectors of the parking sensor buzzer and parking sensor control module. •  Inspect for continuity between the following wiring harnesses: ―  Parking sensor control module terminal R and parking sensor buzzer terminal B ―  Parking sensor control module terminal T and parking sensor buzzer terminal A •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: ―  Parking sensor control module terminal R and parking sensor buzzer terminal B ―  Parking sensor control module terminal T and parking sensor buzzer terminal A If there is a mid-connector ―  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 ―  Repair or replace the wiring harness which has a malfunction.
6	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND PARKING SENSOR BUZZER FOR SHORT TO GROUND •  Inspect for continuity between the following wiring harnesses: ―  Parking sensor control module terminal R and ground ―  Parking sensor control module terminal T and ground •  Is there continuity?	Yes	•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: ―  Parking sensor control module terminal R and parking sensor buzzer terminal B ―  Parking sensor control module terminal T and parking sensor buzzer terminal A If there is a mid-connector ―  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 ―  Repair or replace the wiring harness which has a malfunction.
		No	Go to the next step.
7	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE 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: ―  Parking sensor control module terminal N and electrical supply unit (ESU) terminal 2Q •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: ―  Parking sensor control module terminal N and electrical supply unit (ESU) 2Q If there is a mid-connector ―  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 ―  Repair or replace the wiring harness which has a malfunction.
8	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND ELECTRICAL SUPPLY UNIT (ESU) FOR SHORT TO GROUND •  Inspect for continuity between the following wiring harnesses: ―  Parking sensor control module terminal N and ground •  Is there continuity?	Yes	•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the following wiring harnesses: ―  Parking sensor control module terminal N and electrical supply unit (ESU) terminal 2Q If there is a mid-connector ―  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 ―  Repair or replace the wiring harness which has a malfunction.
		No	Go to the next step.
9	DETERMINE IF MALFUNCTION CAUSE IS PARKING SENSOR BUZZER OR PARKING SENSOR CONTROL MODULE •  Inspect the parking sensor buzzer. (See PARKING SENSOR BUZZER INSPECTION.) •  Is the parking sensor buzzer normal?	Yes	Replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the parking sensor buzzer. (See PARKING SENSOR BUZZER REMOVAL/INSTALLATION.)