PARKING SENSOR SYSTEM DOES NOT OPERATE [PARKING SENSOR SYSTEM]

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

Step	Inspection	Action
1	VERIFY ALL SYSTEM DTCs • Switch the ignition off. • Switch the ignition ON (engine off or on) and wait for 10 s or more. • Perform a CMDTC self-test using the M-MDS. (See DTC INSPECTION [PARKING ASSIST UNIT (ULTRA SONIC)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT (ULTRA SONIC)].)
No	Go to the next step.
2	VERIFY MALFUNCTION SYMPTOM • Switch the ignition ON (engine off or on). • Turn the parking sensor switch on. • Does the parking sensor indicator turn on and is the buzzer activated?	Yes	If buzzer is activated after turning the indicator on: • System is normal. If buzzer is not activated: • Perform an inspection referring to “PARKING SENSOR BUZZER DOES NOT ACTIVATE/BUZZER SOUND IS SMALL”. (See PARKING SENSOR BUZZER DOES NOT ACTIVATE/BUZZER SOUND IS SMALL [PARKING SENSOR SYSTEM].) If indicator does not turn on: • Perform an inspection referring to “PARKING SENSOR INDICATOR DOES NOT TURN ON”. (See PARKING SENSOR INDICATOR DOES NOT TURN ON [PARKING SENSOR SYSTEM].)
No	Go to the next step.
3	INSPECT CLIMATE CONTROL UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Disconnect the climate control unit connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
No	Repair or replace the connector.
4	INSPECT PARKING ASSIST UNIT (ULTRASONIC) CONNECTOR CONDITION • Disconnect the parking assist unit (ultrasonic) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
No	Repair or replace the connector.
5	INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR SHORT TO GROUND • Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Climate control unit terminal 1D ― Climate control unit terminal 1F • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S • Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground.
No	Go to the next step.
6	INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ― Climate control unit terminal 1D ― Climate control unit terminal 1F • Is the voltage 0 V?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S • Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply.
7	INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S ― Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V • Is there continuity?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S • Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit.
8	INSPECT PARKING SENSOR SWITCH/INDICATOR • Inspect the parking sensor switch/indicator. (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].) • Is the parking sensor switch/indicator normal?	Yes	Replace the parking assist unit (ultrasonic). (See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION.)
No	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

Step

Inspection

Action

VERIFY ALL SYSTEM DTCs

• Switch the ignition off.

• Switch the ignition ON (engine off or on) and wait for 10 s or more.

• Perform a CMDTC self-test using the M-MDS.

(See DTC INSPECTION [PARKING ASSIST UNIT (ULTRA SONIC)].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [PARKING ASSIST UNIT (ULTRA SONIC)].)

Go to the next step.

VERIFY MALFUNCTION SYMPTOM

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

• Turn the parking sensor switch on.

• Does the parking sensor indicator turn on and is the buzzer activated?

Yes

If buzzer is activated after turning the indicator on:

• System is normal.

If buzzer is not activated:

• Perform an inspection referring to “PARKING SENSOR BUZZER DOES NOT ACTIVATE/BUZZER SOUND IS SMALL”.

(See PARKING SENSOR BUZZER DOES NOT ACTIVATE/BUZZER SOUND IS SMALL [PARKING SENSOR SYSTEM].)

If indicator does not turn on:

• Perform an inspection referring to “PARKING SENSOR INDICATOR DOES NOT TURN ON”.

(See PARKING SENSOR INDICATOR DOES NOT TURN ON [PARKING SENSOR SYSTEM].)

Go to the next step.

INSPECT CLIMATE CONTROL UNIT CONNECTOR CONDITION

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

• Disconnect the climate control unit connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

Repair or replace the connector.

INSPECT PARKING ASSIST UNIT (ULTRASONIC) CONNECTOR CONDITION

• Disconnect the parking assist unit (ultrasonic) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

Repair or replace the connector.

INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR SHORT TO GROUND

• Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

― Climate control unit terminal 1D

― Climate control unit terminal 1F

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S

• Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to the next step.

INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR SHORT TO POWER SUPPLY

• Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

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

• Measure the voltage at the following terminals (wiring harness-side):

― Climate control unit terminal 1D

― Climate control unit terminal 1F

• Is the voltage 0 V?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S

• Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

INSPECT PARKING SENSOR SWITCH/INDICATOR CIRCUIT FOR OPEN CIRCUIT

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

• Verify that the climate control unit and parking assist unit (ultrasonic) connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

― Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S

― Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Climate control unit terminal 1D—Parking assist unit (ultrasonic) terminal S

• Climate control unit terminal 1F—Parking assist unit (ultrasonic) terminal V

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

INSPECT PARKING SENSOR SWITCH/INDICATOR

• Inspect the parking sensor switch/indicator.

(See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].)

• Is the parking sensor switch/indicator normal?

Yes

Replace the parking assist unit (ultrasonic).

(See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION.)

Replace the climate control unit.

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)