Test Procedure

C1 CHECK FOR DTCS

Are DTCs P04DB, P04E2 or P04E3 present?

Yes	No
GO to C2 .	RETURN to SYMPTOM CHARTS for further direction.

C2 CHECK THE CRANKCASE VENTILATION SENSOR FOR DAMAGE

Ignition OFF.
Inspect the crankcase ventilation sensor connector for damaged or corroded pins.
Inspect the crankcase ventilation sensor for misalignment and incorrect installation.
Inspect the crankcase ventilation sensor for damage.
Inspect the turbocharger inlet surface for debris, or dirt that could cause an incorrect connection.

Is a concern present?

Yes	No
REPAIR as necessary. REFER to the service information , Engine Emission Control. CLEAR the DTCs. REPEAT the self-test.	GO to C3 .

C3 CHECK THE VOLTAGE TO THE CRANKCASE VENTILATION SENSOR

Crankcase Ventilation Sensor connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-) Crankcase Ventilation Sensor Connector, Harness Side
VBPWR - Pin 1	SIGRTN - Pin 3

Is the voltage greater than 10.5 V?

Yes	No
GO to C7.	GO to C4 .

C4 CHECK FOR AN OPEN

Ignition OFF.
PCM-E connector disconnected.

Measure the resistance between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
VBPWR - Pin 1	VBPWR - Pin 14
SIGRTN - Pin 3	SIGRTN - Pin 4

Are the resistances less than 5 ohms?

Yes	No
GO to C5 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

C5 CHECK THE CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure the resistance between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-)
VBPWR - Pin 1	Ground
SIGRTN - Pin 3	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to C10.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

C6 CHECK FOR A SHORT TO VOLTAGE

Measure the voltage between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-)
VBPWR - Pin 1	Ground
SIGRTN - Pin 3	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to C10.

C7 CHECK THE CRNKCSVT CIRCUIT FOR AN OPEN

Ignition OFF.
PCM-E connector disconnected.

Measure the resistance between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
CRNKCSVT - Pin 2	CRNKCSVT - Pin 75

Is the resistance less than 5 ohms?

Yes	No
GO to C8 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

C8 CHECK THE CRNKCSVT CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-)
CRNKCSVT - Pin 2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to C9 .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

C9 CHECK THE CRNKCSVT CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Crankcase Ventilation Sensor Connector, Harness Side	(-)
CRNKCSVT - Pin 2	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to C10 .

C10 CHECK THE CRANKCASE VENTILATION SENSOR FOR CORRECT OPERATION

Ignition OFF.
Crankcase Ventilation Sensor connector connected.
PCM-E connector connected.
Ignition ON, engine OFF.
Access the PCM and monitor the CC_VENTHOSE_V (VOLT) PID.
Record the CC_VENTHOSE_V PID value.
Crankcase Ventilation Sensor connector disconnected.

Does the PID value change?

Yes	No
INSTALL a new Crankcase Ventilation sensor. REFER to the service information , Engine Emission Control. Clear the PCM DTCs. REPEAT the self-test.	GO to C11 .

C11 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins.
- corrosion.
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test.
Verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.