MALFUNCTION DETECTION SOUND ACTIVATED [PARKING SENSOR]

id0903z4829400

Ultrasonic sensor malfunction detection function

• If the parking sensor control module detects that there is a malfunction in the ultrasonic sensor circuit, the sound is activated in the following pattern.

Malfunction detection location

Parking sensor buzzer sound pattern

Corner ultrasonic sensor (LH)

Ultrasonic sensor (LH)

Ultrasonic sensor (RH)

Corner ultrasonic sensor (RH)

Malfunction detection location	Parking sensor buzzer sound pattern
Corner ultrasonic sensor (LH)
Ultrasonic sensor (LH)
Ultrasonic sensor (RH)
Corner ultrasonic sensor (RH)

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

•  Malfunction detection sound activates after ignition is switched ON and the selector lever (AT)/Shift lever (MT) is in the R position.

Possible Causes

•  Ultrasonic sensor, and corner ultrasonic sensor malfunction

―  Dirt, damage (scratch, deformation), or freezing of sensor

―  Connector connection malfunction

―  Sensor malfunction

•  Wiring harness malfunction

•  Ultrasonic sensor and corner ultrasonic sensor signal malfunction

―  Open circuit or short to ground in wiring harness between parking sensor control module terminal E and corner ultrasonic sensor (LH) terminal B

―  Open circuit or short to ground in wiring harness between parking sensor control module terminal G and corner ultrasonic sensor (RH) terminal B

―  Open circuit or short to ground in wiring harness between parking sensor control module terminal I and ultrasonic sensor (LH) terminal B

―  Open circuit or short to ground in wiring harness between parking sensor control module terminal K and ultrasonic sensor (RH) terminal B

•  Ultrasonic sensor and corner ultrasonic sensor ground system malfunction

―  Open circuit in wiring harness between parking sensor control module terminal H and terminal A for each sensor

•  Parking sensor control module malfunction

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY ULTRASONIC SENSOR CONDITION

•  Visually inspect the ultrasonic sensor condition.

•  Is there any dirt, damage (scratch, deformation), and freezing on the sensor?

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, ultrasonic sensor 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

•  Switch the ignition off.

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

•  Disconnect the connectors of the ultrasonic sensor and parking sensor control module.

•  Inspect for continuity between the following wiring harnesses:

―  Parking sensor control module terminal E and corner ultrasonic sensor (LH) terminal B

―  Parking sensor control module terminal G and corner ultrasonic sensor (RH) terminal B

―  Parking sensor control module terminal I and ultrasonic sensor (LH) terminal B

―  Parking sensor control module terminal K and ultrasonic sensor (RH) terminal B

―  Parking sensor control module terminal H and terminal A for each sensor

•  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 parking sensor control module and ultrasonic sensor.

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.

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 E and ground

―  Parking sensor control module terminal G and ground

―  Parking sensor control module terminal I and ground

―  Parking sensor control module terminal K and ground

•  Is there continuity?

Yes

•  Refer to the wiring diagram and verify whether or not there is a mid-connector between the parking sensor control module and ultrasonic sensor.

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.

5

DETERMINE IF MALFUNCTION CAUSE IS ULTRASONIC SENSOR OR PARKING SENSOR CONTROL MODULE

•  Reconnect all the disconnected connectors.

•  Connect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

•  Switch the ignition ON (engine off or on).

•  Selector lever (AT)/Shift lever (MT) is in the R position.

•  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.)

Step	Inspection		Action
1	VERIFY ULTRASONIC SENSOR CONDITION • Visually inspect the ultrasonic sensor condition. • Is there any dirt, damage (scratch, deformation), and freezing on the sensor?	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.)
1		No	Go to the next step.
2	INSPECT CONNECTOR CONNECTION CONDITION • Verify the connector connection conditions of the parking sensor control module, ultrasonic sensor short-cord, and ultrasonic sensor. • Are the connection conditions normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning part.
3	INSPECT WIRING HARNESS BETWEEN PARKING SENSOR CONTROL MODULE AND ULTRASONIC SENSOR FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Disconnect the connectors of the ultrasonic sensor and parking sensor control module. • Inspect for continuity between the following wiring harnesses: ― Parking sensor control module terminal E and corner ultrasonic sensor (LH) terminal B ― Parking sensor control module terminal G and corner ultrasonic sensor (RH) terminal B ― Parking sensor control module terminal I and ultrasonic sensor (LH) terminal B ― Parking sensor control module terminal K and ultrasonic sensor (RH) terminal B ― Parking sensor control module terminal H and terminal A for each sensor • Is there continuity?	Yes	Go to the next step.
3		No	• Refer to the wiring diagram and verify whether or not there is a mid-connector between the parking sensor control module and ultrasonic sensor. 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.
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 E and ground ― Parking sensor control module terminal G and ground ― Parking sensor control module terminal I and ground ― Parking sensor control module terminal K and ground • Is there continuity?	Yes	• Refer to the wiring diagram and verify whether or not there is a mid-connector between the parking sensor control module and ultrasonic sensor. 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.
4		No	Go to the next step.
5	DETERMINE IF MALFUNCTION CAUSE IS ULTRASONIC SENSOR OR PARKING SENSOR CONTROL MODULE • Reconnect all the disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Switch the ignition ON (engine off or on). • Selector lever (AT)/Shift lever (MT) is in the R position. • 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.)
5		No	Replace the ultrasonic sensor. (See ULTRASONIC SENSOR REMOVAL/INSTALLATION.)