No.5 CANNOT DETECT OBSTRUCTION [PARKING SENSOR]
id0903z4886100
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5
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Cannot detect obstruction
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DESCRIPTION
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• Does not detect even though obstruction is within the detection area with the detections conditions satisfied.
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POSSIBLE CAUSES
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• R position (ATX), reverse (MTX) signal malfunction.
• Vehicle speed signal malfunction.
• Parking brake signal malfunction.
• Tow bar and trailer signal malfunction.
• Parking sensor control module malfunction.
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY MALFUNCTION SYMPTOM
• Set up the vehicle according to the following conditions:
• Put an object (obstruction) close to each sensor.
• Does the buzzer for each sensor activate (detects obstruction)?
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Yes
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System is normal.
(Explain the effects of noise using the troubleshooting section of the owner's manual)
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No
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Go to the next step.
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2
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VERIFY IF AFTER-MARKET ELECTRONIC DEVICES ARE INSTALLED
• Has an after-market electronic device been installed?
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Yes
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Go to the next step.
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No
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Go to Step 4.
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3
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DETERMINE IF MALFUNCTION CAUSE IS INSTALLATION OF AFTER-MARKET ELECTRONIC DEVICE
• Remove the after-market electrical product.
• Repeat the inspection from Step 1.
• Does the buzzer for each sensor activate (detects obstruction)?
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Yes
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Explain to the customer that the installation of after-market electronic devices can cause noise.
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No
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Go to the next step.
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4
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VERIFY MALFUNCTION CONDITION
• Verify the malfunction conditions in Step 1.
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Front sensors detect all obstructions correctly, but rear sensors do not sense all obstructions correctly:
• Go to the next step.
Rear/back sensors detects all obstructions correctly, but front sensors do not sense all obstructions correctly:
• Go to Step 10.
All front, rear/back sensors do not sense obstructions correctly:
• Go to Step 12.
One sensor or a few sensors do not detect obstructions correctly:
• Inspect the wiring harness of the applicable sensor and repair or replace the malfunctioning location.
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5
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DETERMINE IF MALFUNCTION CAUSE IS R POSITION (ATX), REVERSE (MTX) SIGNAL
• Switch the ignition to ON.
• Turn on the parking sensor switch.
• Measure the voltage of parking sensor control module terminal W.
• Is the voltage normal?
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Yes
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Go to Step 8.
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No
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Go to the next step.
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6
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VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE TERMINAL W AND BCM TERMINAL 7A
• Switch the ignition to off.
• Disconnect the parking sensor control module and BCM connectors.
• Verify if there is continuity between parking sensor control module terminal W and BCM terminal 7A
• 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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Repair the open circuit in the wiring harness.
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7
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VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT IN WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE TERMINAL W AND BCM TERMINAL 7A
• Verify if there is continuity between parking sensor control module terminal W and ground.
• Is there continuity?
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Yes
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Repair for a short to the wiring harness ground.
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No
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Inspect and repair the following:
• Open circuit in wiring harness between BCM terminal 2H and inhibitor switch (ATX)/reverse switch (MTX)
• Inhibitor switch (ATX)
• Reverse switch (MTX)
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8
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VERIFY IF MALFUNCTION CAUSE IS PARKING BRAKE SIGNAL
• Switch the ignition to ON.
• Turn on the parking sensor switch.
• Release the parking brake.
• Measure the voltage of parking sensor control module terminal AA.
• Is the voltage 5 V or more?
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Yes
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Go to the next step.
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No
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Inspect and repair the following:
• Parking brake switch (stuck on)
• Wiring harness between parking brake switch and parking sensor control module terminal AA wiring harness (short to ground)
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9
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VERIFY IF MALFUNCTION CAUSE IS SHORT TO GROUND IN TOW BAR AND TRAILER SIGNAL (TOW BAR AND TRAILER NOT INSTALLED)
• Switch the ignition to ON.
• Turn on the parking sensor switch.
• Measure the voltage of parking sensor control module terminal AF and terminal AD.
• Is the voltage 1.0 V or less?
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Yes
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Repair for a short to ground in the wiring harness of parking sensor control module terminal AF and terminal AD.
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No
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Replace the parking sensor control module.
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10
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VERIFY IF MALFUNCTION CAUSE IS VEHICLE SPEED SIGNAL CIRCUIT WIRING HARNESS
• Switch the ignition to ON.
• Turn on the parking sensor switch.
• Measure the voltage of parking sensor control module terminal Y.
• Is the voltage normal?
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Yes
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Replace the parking sensor control module.
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No
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Go to the next step.
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11
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DETERMINE IF MALFUNCTION CAUSE IS SPEEDOMETER RELATED
• Verify the speedometer display.
• Does the speedometer indicate the actual vehicle speed?
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Yes
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Repair for an open circuit, short to the wiring harness between parking sensor control module terminal Y and instrument cluster terminal 2O.
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No
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Go to the instrument cluster symptom troubleshooting procedure “NO. 7 SPEEDOMETER INDICATION IS DEFECTIVE [INSTRUMENT CLUSTER]”.
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12
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VERIFY IF MALFUNCTION CAUSE IS PARKING BRAKE SIGNAL
• Switch the ignition to ON.
• Turn on the parking sensor switch.
• Release the parking brake.
• Measure the voltage of parking sensor control module terminal AA.
• Is the voltage 5 V or more?
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Yes
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Replace the parking sensor control module.
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No
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Inspect and repair the following:
• Parking brake switch (stuck on)
• Wiring harness between parking brake switch and parking sensor control module terminal AA wiring harness (short to ground)
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