Test Procedure

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HG1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)

Check for DTCs P053A, P145E, P1489 or P2282.

Are any of the above listed DTCs present?

Yes	No
For DTCs P053A, P145E and P1489, GO to HG5. For DTC P2282, GO to HG4.	For all other symptoms without DTCs, GO to HG2.

HG2 VISUAL INSPECTION OF THE PCV VALVE

Remove and inspect the PCV valve for damage.
Check the PCV valve, hoses and connections for leaks or restrictions.
Verify the PCV valve maintenance schedule has been followed.
Verify the correct PCV valve part number.
Verify the PCV valve is clean.
Verify the fresh air tube and related hoses are clean and routed correctly.

Is a concern present?

Yes	No
REPAIR as necessary. VERIFY the symptom no longer exists.	GO to HG3.

HG3 STUCK PCV VALVE CHECK

Disconnect the PCV valve from the valve cover.
Shake the PCV valve.

Does the PCV valve rattle when shaken?

Yes	No
REINSTALL the PCV valve. For PCV systems with electrical heating, GO to HG5. For PCV systems without electrical heating, GO to HG10.	The PCV valve is sticking. INSTALL a new PCV valve. VERIFY the symptom no longer exists.

HG4 CHECK FOR VACUUM LEAKS

Check for a damaged or disconnected PCV vacuum hose.
Check for air leaks between the throttle body and intake valves.
Visually inspect the intake throttle plate for sticking or binding.
Verify the correct PCV valve part number.

Is a concern present?

Yes	No
REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test.	GO to HG11.

HG5 CHECK THE HARNESS VOLTAGE TO THE PCM CONTROLLED PCV HEATER

Suspect PCV connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) PCVHF Connector, Harness Side	(-)
IGN START/RUN	Ground

Measure the voltage between:

(+) PCV Connector, Harness Side	(-)
IGN START/RUN	Ground

Is the voltage greater than 10 V?

Yes	No
GO to HG6.	REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.

HG6 CHECK THE HARNESS CIRCUIT TO THE PCM CONTROLLED PCV HEATER

Ignition OFF.
PCM connector disconnected.

Measure the resistance between:

(+) PCM Connector, Harness Side	(-) PCVHF Connector, Harness Side
PCVHF	PCVHF

Measure the resistance between:

(+) PCM Connector, Harness Side	(-) PCV Connector, Harness Side
PCVHC	PCVHC

Is the resistance less than 5 ohms?

Yes	No
GO to HG7.	REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.

HG7 CHECK THE SUSPECT PCV HEATER CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS

Measure the resistance between:

(+) PCVHF Connector, Harness Side	(-)
PCVHF	Ground

Measure the resistance between:

(+) PCV Connector, Harness Side	(-)
PCVHC	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to HG8.	REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.

HG8 CHECK THE SUSPECT PCV CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS

Ignition ON, engine OFF.

Measure the voltage between:

(+) PCVHF Connector, Harness Side	(-)
PCVHF	Ground

Measure the voltage between:

(+) PCV Connector, Harness Side	(-)
PCVHC	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.	GO to HG9.

HG9 CHECK THE RESISTANCE OF THE PCM CONTROLLED SUSPECT PCV HEATER

Measure the resistance between:

(+) PCVHF Connector, Component Side	(-) PCVHF Connector, Component Side
IGN START/RUN	PCVHF

Measure the resistance between:

(+) PCV Connector, Component Side	(-) PCV Connector, Component Side
IGN START/RUN	PCVHC

Is the resistance between 10 - 35 ohms?

Yes	No
GO to HG11.	INSTALL a new PCV valve or tube. REFER to the appropriate Engine Emission Control article . CLEAR the DTCs. REPEAT the self-test.

HG10 PCV SYSTEM CHECK

Start the engine and warm it until engine temperature is stable.
Disconnect the closure (fresh air) hose from the remote air cleaner or air outlet tube (the tube connecting the mass air flow sensor and the throttle body).
Place a stiff piece of paper over the hose end. Wait 1 minute.

Does vacuum hold the paper in place?

Yes	No
The PCV system is OK. RETURN to SYMPTOM CHARTS for further direction.	CHECK for vacuum leaks/obstruction in the PCV system (such as oil cap, PCV valve, hoses, cut grommets, valve cover bolt torque/gasket leak). REFER to the appropriate Engine Emission Control, Evaporative Emission (EVAP) Control System Vacuum Routing, for PCV system components and routing. REPAIR as necessary.

HG11 CHECK IF A CONCERN OR DTC IS STILL PRESENT

Connect the PCV system.
Clear the DTCs.
Carry out the self-test.

Is the concern or DTC is still present?

Yes	No
GO to HG12.	Unable to duplicate or identify the concern at this time. RETURN to SYMPTOM CHARTS for further direction.

HG12 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 and 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) , Programming the VID Block for a Replacement PCM.	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.