No.2 MALFUNCTION DETECTION SOUND ACTIVATED [PARKING SENSOR]

id0903z4886400

2 | Malfunction detection sound activated
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DESCRIPTION | Malfunction detection sound activates after ignition is switched ON.
POSSIBLE CAUSES | • Ultrasonic sensor malfunction ― Ultrasonic sensor soiled, damaged (scratches, deformation), frozen (iced) ― Ultrasonic sensor malfunction • Wiring harness malfunction ― Open or short circuit in parking sensor control module terminal 2G and corner sensor (RH) terminal C ― Open or short circuit in parking sensor control module terminal 2H and corner sensor (LH) terminal C ― Open or short circuit in parking sensor control module terminal 2E and back sensor (RH) terminal C ― Open or short circuit in parking sensor control module terminal 2C and back sensor (LH) terminal C ― Open or short circuit in parking sensor control module terminal 2A and each ultrasonic sensor terminal A ― Open or short circuit in parking sensor control module terminal 2B and each ultrasonic sensor terminal B ― Open or short circuit in short code (between each ultrasonic sensor and parking sensor control module) • Parking sensor control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY CONDITION OF EACH SENSOR • Visually inspect the condition of each ultrasonic sensor. • Is a sensor soiled, damaged (scratches, deformation), or frozen (iced)? | Yes | If there is any dirt or ice adhesion: • Remove any dirt or ice and verify if the malfunction recurs. • If the malfunction recurs, go to the next step. If there is any damage: • Replace the sensor. (See ULTRASONIC SENSOR REMOVAL/INSTALLATION.)
No | Go to the next step.
2 | INSPECT CONNECTOR CONNECTION CONDITION • Verify the connector connection conditions of the parking sensor control module, short-cord, and ultrasonic sensor. • Are the connection conditions normal? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part.
3 | INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND ULTRASONIC SENSOR FOR OPEN CIRCUIT • Turn the ignition switch to the OFF position. • Disconnect the connectors of the ultrasonic sensor, short-cord and parking sensor control module. • Inspect for continuity between the following wiring harnesses: ― Parking sensor control module terminal 2A—short-cord terminal D—corner sensor (RH) terminal A ― Parking sensor control module terminal 2B—short-cord terminal C—corner sensor (RH) terminal B ― Parking sensor control module terminal 2G—short-cord terminal E—corner sensor (RH) terminal C ― Parking sensor control module terminal 2H—short-cord terminal B—corner sensor (LH) terminal C ― Short-cord terminal D—corner sensor (LH) terminal A ― Short-cord terminal C—corner sensor (LH) terminal B ― Parking sensor control module terminal 2E—short-cord terminal F—back sensor (RH) terminal C ― Short-cord terminal D—back sensor (RH) terminal A ― Short-cord terminal C—back sensor (RH) terminal B ― Parking sensor control module terminal 2C—short-cord terminal A—back sensor (LH) terminal C ― Short-cord terminal D—back sensor (LH) terminal A ― Short-cord terminal C—back sensor (LH) terminal B • Is there continuity? | Yes | Go to the next step.
No | Repair for an open circuit in the wiring harness.
4 | INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND ULTRASONIC SENSOR FOR SHORT TO GROUND • Inspect for continuity between the following wiring harnesses: ― Parking sensor control module terminal 2A and ground ― Parking sensor control module terminal 2B and ground ― Parking sensor control module terminal 2G and ground ― Parking sensor control module terminal 2H and ground ― Parking sensor control module terminal 2E and ground ― Parking sensor control module terminal 2C and ground • Is there continuity? | Yes | Repair or replace the wiring harness.
No | Go to the next step.
5 | DETERMINE IF MALFUNCTION CAUSE IS ULTRASONIC SENSOR OR PARKING SENSOR CONTROL MODULE • Reconnect all the disconnected connectors. • Refer to the parking sensor control module inspection and verify the generated pulse for each sensor. (See PARKING SENSOR CONTROL MODULE INSPECTION.) • Can the generated pulse be verified? | Yes | Replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No | Replace the ultrasonic sensor. (See ULTRASONIC SENSOR REMOVAL/INSTALLATION.)