Test Procedure

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

HU1 PART THROTTLE SYMPTOM

Are any part throttle concerns present?

Yes	No
GO to HU6.	GO to HU2.

HU2 CHECK THE BASE IDLE SPEED

NOTE: The vehicle must be at operating temperature and at idle for a minimum of 1 minute.

Key on engine running.
Determine if the idle speed is incorrect. Refer to the REFERENCE VALUE SYMPTOM CHART if necessary.
Access the PCM and monitor the RPM PID.
If equipped, read the vehicle tachometer.

Is vehicle idle speed correct?

Yes	No
GO to HU4.	Key in OFF position. GO to HU3.

HU3 CHECK THE BASE IDLE SPEED

Check that the throttle arm contacts the return stop.

Is the idle speed high?

Yes	No
GO to HU8.	GO to HU9.

HU4 CHECK FOR BINDING OR STICKING OF THE THROTTLE SYSTEM

Gently cycle the throttle from fully closed to fully open and back to fully closed. Check for sticking or binding during rotation.

Is a stick or bind condition present?

Yes	No
GO to HU5.	GO to HU6.

HU5 ISOLATE THE BINDING AND/OR STICKING CONCERN

CAUTION: Do not attempt to clean the throttle bore and plate area. Cleaning will damage the throttle body assembly.

NOTE: The sticking or binding condition can either be within the cables or throttle body assembly.

Disconnect the accelerator cable and speed control cable from the throttle body linkage.
Rotate the throttle body linkage.

Does the throttle body rotate freely without a sticking, binding or grabbing condition?

Yes	No
REPAIR the cable(s) causing the concern.	INSTALL a new throttle body assembly.

HU6 CHECK THE FUNCTIONALITY OF THROTTLE POSITION SENSOR

Key in ON position.
Access the PCM and monitor the TP V PID.
Gently cycle the throttle from fully closed to fully open and back to fully closed.

Did the TP PID display a smooth reading?

Yes	No
Key in OFF position. GO to HU7.	Key in OFF position. INSTALL a new TP sensor.

HU7 CHECK THE INTAKE AIR SYSTEM FOR LEAKS, OBSTRUCTIONS AND DAMAGE

NOTE: The Focus air cleaner element is integral to the air cleaner assembly. Inspect the air restriction gauge (if equipped) for a restriction indication.

Remove the air cleaner element. Check the air cleaner for blockage.
Check for restrictions between the air inlet and the throttle body.

Are any restriction concerns present?

Yes	No
INSTALL a new air cleaner element. REMOVE the restriction.	REINSTALL the air cleaner element. GO to HU8.

HU8 CHECK THE POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM

NOTE: A high idle may indicate an incorrect PCV valve size or a vacuum leak.

Check that no cracks or leaks are present.
Remove the PCV valve.
- Verify a clean PCV valve.
- Verify the proper PCV valve part number.

Are any PCV System concerns present?

Yes	No
INSTALL a new PCV valve. REPAIR as necessary.	For high idle, GO to HU12. For all others, CONNECT the PCV valve. GO to HU9.

HU9 CHECK THE IAC VALVE RESPONSE

Key on engine running.
The vehicle must be at operating temperature and at idle for a minimum of 1 minute.
IAC connector disconnected.

Did the RPM drop or the engine stall?

Yes	No
GO to HU11.	GO to HU10.

HU10 CHECK THE IAC VALVE RESPONSE

Is the idle speed high?

Yes	No
GO to HU12.	Key in OFF position. INSTALL a new IAC valve.

HU11 INSPECT THE THROTTLE BODY PLATE HOLE FOR PLUGGING

NOTE: Only some applications have a throttle plate hole. If not equipped GO to SYMPTOM CHARTS - GASOLINE MODELS .

Key in OFF position.
Remove the resonator from the throttle body assembly.
Inspect the throttle plate hole for any restrictions.

Are any restriction concerns present?

Yes	No
REPAIR as necessary.	Concern is elsewhere. RETURN to SYMPTOM CHARTS - GASOLINE MODELS for further direction.

HU12 CHECK FOR VACUUM LEAKS

Listen for vacuum leaks.
Inspect the entire air intake system from the mass air flow (MAF) sensor to the intake manifold for leaks such as:
- cracked or punctured inlet air tube.
- loose connections on the inlet air tube at the air cleaner housing or throttle body.
- IAC valve assembly or gasket.
- EGR valve gasket leak to intake manifold.
- intake manifold assembly or gasket.
- EGR valve diaphragm or control solenoid.
- vacuum supply connectors and hose.

Are any leaks present?

Yes	No
Key in OFF position. REPAIR as necessary.	Key in OFF position. GO to HU13.

HU13 CHECK THE THROTTLE BODY FOR EXCESSIVE WEAR

Remove the throttle body assembly. REFER to INTAKE AIR DISTRIBUTION AND FILTERING .
Check the following:
- excessive wear or grooving in the throttle bore.
- misaligned or worn throttle plate.
- excessive gap between the throttle bore and plate.

Are any concerns present?

Yes	No
INSTALL a new throttle body assembly.	Concern is elsewhere. RETURN to SYMPTOM CHARTS - GASOLINE MODELS for further direction.

HU14 DTCS P1512, P1513, P1516, P1517, P1518, P1519, P1520, P1537, P1538, P2004, P2005, P2006, P2007, P2008, P2014, P2015, P2019 OR P2020: VISUAL INSPECTION

NOTE: If unable to fully carry out the following inspections, answer NO to the question in this step.

Visually inspect the linkage for possible causes of binding or obstructions. Check the lever/linkage for movement. There may be some tension in one direction but there should be full travel.
NOTE: The IMRC return spring is strong on vacuum systems. Make sure they operate properly and the plates open and close fully. On vacuum operated systems the engine must run for 20 seconds to restore vacuum then return to KOEO for testing.

Some IMRC electrical systems are driven in both directions by the solenoid and do not use a return spring. They can not be opened manually.
Manually open and close the IMRC plates at the intake manifold while checking for sticking or binding.

Is a mechanical concern present?

Yes	No
GO to HU15.	GO to HU16.

HU15 CHECK THE IMRC FOR MECHANICAL OPERATION

Disconnect the IMRC linkage or remove the actuator assembly from the manifold.
NOTE: IMRC return spring is strong - approximately 0.34 to 0.45 Nm (3 to 4 in-lb).

Some electric motor applications do not use a return spring and should move freely when open and closed.
Rotate the IMRC plate lever to fully open and to fully closed, contacting both limits.
Check for sticking or binding during rotation.

Is a mechanical concern present?

Yes	No
REFER to FUEL CHARGING AND CONTROLS to REPAIR as necessary or INSTALL a new IMRC.	GO to HU16.

HU16 CHECK THE FUNCTIONALITY OF IMRC

WARNING: KEEP FINGERS CLEAR OF THE MECHANISM.

Key on engine running.
NOTE: The vehicle must be at operating temperature and at idle for a minimum of 1 minute.
Key in OFF position.
Key ON, engine OFF.
Access the PCM and control the IMRC PID.
Access the PCM and monitor the IMRCM PID.

Command IMRC ON then OFF.

NOTE: If the vehicle is equipped with a vacuum-type IMRC return to Key ON Engine RUN to conduct the IMRC check. Momentarily increase the engine speed above 3, 000 RPM and observe the PIDs.

VEHICLE	IMRC OFF	IMRC ON
BASE	2.5	0
Focus, 2.0L	0	5
Focus, 2.3L	0	5
F-150, 5.4L	5	0

Using the table for reference, did the IMRCM voltage values correctly change while the IMRC was cycled?

Yes	No
GO to PINPOINT TEST Z STEP 1 .	GO to HU17.

HU17 CHECK THE FUNCTIONALITY OF IMRC

WARNING: KEEP FINGERS CLEAR OF THE MECHANISM.

Key on engine running.
NOTE: The vehicle must be at operating temperature and at idle for a minimum of 1 minute.
Key in OFF position.
Key ON, engine OFF.
Physically monitor the IMRC actuator.
Access the PCM and control the IMRC PID.
Command the outputs ON.
NOTE: If the vehicle is equipped with a vacuum-type IMRC return to Key ON Engine RUN to conduct the IMRC check. Momentarily increase the engine speed above 3, 000 RPM and observe the PIDs.

Did the IMRC levers cycle from fully closed and remain fully open while outputs were on?

Yes	No
Key in OFF position. GO to HU27.	Key in OFF position. GO to HU18.

HU18 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS

IMRC Actuator connector disconnected.
Key in ON position.

Measure the voltage between:

(+) IMRC Actuator Connector, Harness Side	(-)
VPWR	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to HU19.	REPAIR the open circuit and retest the vehicle.

HU19 CHECK THE GROUND CIRCUIT FOR AN OPEN IN THE HARNESS

Measure the voltage between:

(+) IMRC Actuator Connector, Harness Side	(-) IMRC Actuator Connector, Harness Side
VPWR	PWRGND

Is the voltage greater than 10.5 V?

Yes	No
GO to HU20.	REPAIR the open circuit and retest the vehicle.

HU20 VERIFY THE DRIVER CIRCUIT FUNCTION

Connect a non-powered test lamp between:

(+) IMRC Actuator Connector, Harness Side	(-) IMRC Actuator Connector, Harness Side
VPWR	IMRC

Does the test lamp illuminate?

Yes	No
Key in OFF position. For Focus 2.3L, GO to HU25. For all others, GO to HU26.	GO to HU21.

HU21 VERIFY THE DRIVER CIRCUIT FUNCTION

Access the PCM and control the IMRC PID.

Connect a non-powered test lamp between:

(+) IMRC Actuator Connector, Harness Side	(-) IMRC Actuator Connector, Harness Side
VPWR	IMRC

Command the outputs ON.
NOTE: If the vehicle is equipped with a vacuum-type IMRC return to Key ON Engine RUN to conduct the IMRC check. Momentarily increase the engine speed above 3, 000 RPM and observe the PIDs.

Does the test lamp illuminate?

Yes	No
For Focus 2.3L, GO to HU25. For all others, GO to HU24.	Key in OFF position. GO to HU22.

HU22 CHECK THE IMRC CIRCUIT FOR AN OPEN IN THE HARNESS

PCM connector disconnected.

Measure the resistance between:

(+) IMRC Actuator Connector, Harness Side	(-) PCM Connector, Harness Side
IMRC	IMRC

Is the resistance less than 5 ohms?

Yes	No
GO to HU23.	REPAIR the open circuit and retest the vehicle.

HU23 CHECK THE IMRC CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS

Key in ON position.

Measure the voltage between:

(+) IMRC Actuator Connector, Harness Side	(-)
IMRC	Ground

Is the voltage less than 10.5 V?

Yes	No
Key in OFF position. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	Key in OFF position. REPAIR the short circuit to PWR and retest the vehicle.

HU24 CHECK FOR SHORTS BETWEEN CIRCUITS IN THE IMRC HARNESS

Key in OFF position.
PCM connector connected.

Measure the resistance between:

(+) IMRC Actuator Connector, Harness Side	(-) IMRC Actuator Connector, Harness Side
IMRC	IMRCM
IMRC	PWRGND

Are the resistances greater than 10K ohms?

Yes	No
INSTALL a new IMRC actuator and retest vehicle.	GO to HU26.

HU25 CHECK FOR SHORT BETWEEN THE IMRC AND PWRGND CIRCUITS IN THE HARNESS

PCM connector disconnected.

Measure the resistance between:

(+) PCM Connector, Harness Side	(-) PCM Connector, Harness Side
IMRC	PWRGND

Is the resistance greater than 10K ohms?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	REPAIR the short circuit and retest the vehicle. GO to HU40.

HU26 CHECK FOR SHORTS BETWEEN CIRCUITS IN THE IMRC HARNESS

PCM connector disconnected.

Measure the resistance between:

(+) IMRC Actuator Connector, Harness Side	(-) IMRC Actuator Connector, Harness Side
IMRC	IMRCM
IMRC	PWRGND

Are the resistances greater than 10K ohms?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	REPAIR the short circuit and retest the vehicle. GO to HU40.

HU27 CHECK THE IMRCM PID

Key in ON position.
Access the PCM and monitor the IMRCM PID.

Is the IMRCM PID displaying either VREF or approximately 2.5 volts?

Yes	No
For Focus 2.3L, GO to HU34. For all others, GO to HU28.	For Focus 2.3L, GO to HU28. For all others, GO to HU32.

HU28 CHECK THE IMRCM CIRCUIT FOR A SHORT TO VPWR

Key on engine running.
NOTE: The vehicle must be at operating temperature and at idle for a minimum of 1 minute.
Key in OFF position.
Key ON, engine OFF.
Access the PCM and control the IMRC PID.
Command the outputs ON.
NOTE: If the vehicle is equipped with a vacuum-type IMRC return to Key ON Engine RUN to conduct the IMRC check. Momentarily increase the engine speed above 3, 000 RPM and observe the PIDs.
Access the PCM and monitor the IMRCM PID.

Is the voltage less than 1 V?

Yes	No
For Focus 2.3L, GO to HU32. For all others, GO to HU29.	For Focus 2.3L, GO to HU29. For all others, GO to HU34.

HU29 CHECK THE IMRCM CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS

Key in ON position.
IMRCM Sensor connector disconnected.

Measure the voltage between:

(+) IMRCM Sensor Connector, Harness Side	(-)
IMRCM	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to HU30.	GO to HU31.

HU30 CHECK THE IMRCM CIRCUIT FOR A SHORT TO POWER IN THE CONTROL MODULE

PCM connector disconnected.
Key in ON position.

Measure the voltage between:

(+) IMRCM Sensor Connector, Harness Side	(-)
IMRCM	Ground

Is the voltage greater than 10.5 V?

Yes	No
Key in OFF position. REPAIR the short circuit to PWR and retest the vehicle.	Key in OFF position. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

HU31 CHECK THE IMRCM CIRCUIT FOR A SHORT TO VPWR

Key in OFF position.

Measure the resistance between:

(+) IMRCM Sensor Connector, Component Side	(-) IMRCM Sensor Connector, Component Side
IMRCM	VPWR

Is the resistance greater than 10K ohms?

Yes	No
CHECK for an intermittent concern. GO to PINPOINT TEST Z STEP 1 .	INSTALL a new IMRCM sensor and retest vehicle. GO to HU40.

HU32 CHECK THE IMRCM CIRCUIT FOR A SHORT TO GROUND

Key in ON position.
Access the PCM and monitor the IMRCM PID.
IMRCM Sensor connector disconnected.

Did voltage change from less than 1 volt to VREF when disconnecting the IMRCM harness connector?

Yes	No
Key in OFF position. INSTALL a new IMRCM sensor and retest vehicle. GO to HU40.	GO to HU33.

HU33 CHECK THE IMRCM CIRCUIT(S) FOR A SHORT TO GROUND IN THE HARNESS

PCM connector disconnected.

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) IMRCM Sensor Connector, Harness Side
IMRCM	PWRGND

Is the resistance greater than 10K ohms?

Yes	No
Key in OFF position. INSTALL a new PCM and retest vehicle. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . GO to HU40.	Key in OFF position. REPAIR the short circuit to GND and retest the vehicle. GO to HU40.

HU34 CHECK THE MONITOR CIRCUIT RESPONSE

IMRCM Sensor connector disconnected.
Access the PCM and monitor the IMRCM PID.

Connect a 5 amp fused jumper wire between the following:

Point A IMRCM Sensor Connector, Harness Side	Point B
IMRCM	Ground

Did the IMRCM PID voltage change from VREF to less than 1 volt when connecting the jumper?

Yes	No
Key in OFF position. GO to HU35.	Key in OFF position. GO to HU38.

HU35 CHECK THE PWRGND CIRCUIT FOR CONTINUITY TO CHASSIS GND

Remove the jumper wire(s)
PCM connector connected.

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) Vehicle Battery
PWRGND	Negative terminal

Is the resistance less than 5 ohms?

Yes	No
GO to HU36.	GO to HU37.

HU36 CHECK THE MONITOR CIRCUIT FOR AN INTERMITTENT OPEN

PCM connector disconnected.

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
IMRCM	IMRCM

Wiggle, shake, and bend small sections of the wiring harness while working from the component to the module.

Is the resistance fluctuating while checking the harness?

Yes	No
REPAIR the open circuit and retest the vehicle. GO to HU40.	INSTALL a new IMRCM sensor and retest vehicle. GO to HU40.

HU37 CHECK HARNESS PWRGND CIRCUIT FOR CONTINUITY

PCM connector disconnected.

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
PWRGND	PWRGND

Is the resistance less than 5 ohms?

Yes	No
CHECK the circuit for an intermittent concern. GO to PINPOINT TEST Z STEP 1 .	REPAIR the open circuit and retest the vehicle. GO to HU40.

HU38 CHECK THE IMRCM CIRCUIT FOR AN OPEN IN THE HARNESS

Remove the jumper wire(s)
PCM connector disconnected.

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
IMRCM	IMRCM

Is the resistance less than 5 ohms?

Yes	No
GO to HU39.	REPAIR the open circuit and retest the vehicle. GO to HU40.

HU39 CHECK THE MONITOR CIRCUIT FOR AN INTERMITTENT OPEN

Measure the resistance between:

(+) IMRCM Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
IMRCM	IMRCM

Wiggle, shake, and bend small sections of the wiring harness while working from the component to the module.

Is the resistance fluctuating while checking the harness?

Yes	No
REPAIR the open circuit and retest the vehicle. GO to HU40.	INSTALL a new PCM and retest vehicle. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . GO to HU40.

HU40 VERIFY THE REPAIR

Key in ON position.
Clear the PCM DTCs.
Access the PCM and monitor the IMRCM, IMRCF and IMRC PIDs.
Key on engine running.
Drive the vehicle, obeying all traffic and safety laws.
Safely carry out three acceleration runs from a stop or roll to between 3000 and 4, 000 RPM.
Watch for any PID change.
Carry out the PCM Quick Test.

Are any DTCs received?

Yes	No
Key in OFF position. DISREGARD the current diagnostic trouble code (DTC) at this time. ADDRESS the next DTC. GO to POWERTRAIN DTC CHARTS AND DESCRIPTIONS - GASOLINE MODELS .	The test completed successfully.

HU41 DTCS P0660, P1549, P2070 OR P2071: VISUAL INSPECTION OF INTAKE MANIFOLD TUNING VALVE

Inspect the component for signs of damage.
Check the harness and connection.

Is a concern present?

Yes	No
REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test.	GO to HU42.

HU42 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS

IMTV Actuator connector disconnected.
Key in ON position.

Measure the voltage between:

(+) IMTV Actuator Connector, Harness Side	(-) Vehicle Battery
VPWR	Negative terminal

Is the voltage greater than 10.5 V?

Yes	No
GO to HU43.	REPAIR the open circuit and retest the vehicle.

HU43 CHECK THE IMTV CIRCUIT FOR AN OPEN IN THE HARNESS

Key in OFF position.
PCM connector disconnected.

Measure the resistance between:

(+) IMTV Actuator Connector, Harness Side	(-) PCM Connector, Harness Side
IMTV	IMTV

Is the resistance less than 5 ohms?

Yes	No
GO to HU44.	REPAIR the open circuit and retest the vehicle.

HU44 CHECK THE IMTV CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS

Measure the resistance between:

(+) PCM Connector, Harness Side	(-)
IMTV	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to HU45.	REPAIR the short circuit to GND and retest the vehicle.

HU45 CHECK THE IMTV CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS

Measure the voltage between:

(+) PCM Connector, Harness Side	(-)
IMTV	Ground

Is the voltage less than 1 V?

Yes	No
GO to HU46.	REPAIR the short circuit to PWR and retest the vehicle.

HU46 DTCS P2070 AND P2071: CHECK FOR IMTVM DTCS

Are any of the above listed DTCs present?

Yes	No
GO to HU47.	GO to HU53.

HU47 CHECK THE IMTVM CIRCUIT FOR AN OPEN IN THE HARNESS

Measure the resistance between:

(+) IMTV Actuator Connector, Harness Side	(-) PCM Connector, Harness Side
IMTVM	IMTVM

Is the resistance less than 5 ohms?

Yes	No
GO to HU48.	REPAIR the open circuit and retest the vehicle.

HU48 CHECK THE PWRGND CIRCUIT FOR AN OPEN IN THE HARNESS

Measure the resistance between:

(+) IMTV Actuator Connector, Harness Side	(-)
PWRGND	Ground

Is the resistance less than 5 ohms?

Yes	No
GO to HU49.	REPAIR the open circuit and retest the vehicle.

HU49 CHECK FOR SHORTS BETWEEN CIRCUITS IN THE IMTV HARNESS

Measure the resistance between:

(+) IMTV Actuator Connector, Harness Side	(-) IMTV Actuator Connector, Harness Side
IMTVM	IMTV
IMTVM	PWRGND

Are the resistances greater than 10K ohms?

Yes	No
GO to HU50.	REPAIR the short circuit and retest the vehicle.

HU50 CHECK THE IMTVM CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS

Measure the voltage between:

(+) IMTV Actuator Connector, Harness Side	(-) Vehicle Battery
IMTVM	Negative terminal

Is the voltage less than 1 V?

Yes	No
GO to HU51.	REPAIR the short circuit to PWR and retest the vehicle.

HU51 CHECK THE IMTVM CIRCUIT FOR A SHORT TO POWER IN THE CONTROL MODULE

PCM connector connected.

Measure the voltage between:

(+) IMTV Actuator Connector, Harness Side	(-) Vehicle Battery
IMTVM	Negative terminal

Is the voltage less than 10.5 V?

Yes	No
GO to HU52.	INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

HU52 CHECK FOR SHORTS IN THE PCM

Measure the resistance between:

(+) IMTV Actuator Connector, Harness Side	(-) IMTV Actuator Connector, Harness Side
IMTVM	IMTV
IMTVM	PWRGND

Are the resistances greater than 10K ohms?

Yes	No
GO to HU53.	INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

HU53 CHECK THE IMTV DRIVER CIRCUIT WITH THE PCM CONNECTED

IMTV Actuator connector disconnected.
PCM connector connected.
Key in ON position.

Connect a non-powered test lamp between:

(+) IMTV Actuator Connector, Harness Side	(-) IMTV Actuator Connector, Harness Side
VPWR	IMTV

Does the test lamp illuminate?

Yes	No
INSTALL a new PCM and retest vehicle. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	GO to HU54.

HU54 CHECK THE IMTV PCM CIRCUIT WHEN COMMANDED ON

Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .

Connect a non-powered test lamp between:

(+) IMTV Actuator Connector, Harness Side	(-) IMTV Actuator Connector, Harness Side
VPWR	IMTV

Command the outputs ON.

Does the test lamp illuminate?

Yes	No
GO to HU55.	Key in OFF position. INSTALL a new PCM and retest vehicle. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

HU55 CHECK THE IMTV FOR DAMAGE

Key in OFF position.
Remove the IMTV. REFER to ELECTRONIC ENGINE CONTROLS.
Visually inspect the shutter for damage.
Manually rotate the shutter.

Is a concern present?

Yes	No
INSTALL a new IMTV actuator and retest vehicle.	GO to HU56.

HU56 CHECK THE IMTV FOR FUNCTIONALITY WHEN COMMANDED ON

IMTV Actuator connector connected.
Key in ON position.
Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
Command the outputs ON.

Did the IMTV shutter rotate?

Yes	No
Key in OFF position. Intermittent concern. GO to PINPOINT TEST Z STEP 1 .	Key in OFF position. INSTALL a new IMTV actuator and retest vehicle.

HU57 DTCS P0663 OR P1532: VISUAL INSPECTION OF INTAKE MANIFOLD TUNING VALVE (BANK 2)

Inspect the component for signs of damage.
Check the harness and connection.

Is a concern present?

Yes	No
REPAIR as necessary. CLEAR the DTCs and REPEAT the self-test.	GO to HU58.

HU58 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS

IMTV2 Actuator connector disconnected.
Key in ON position.

Measure the voltage between:

(+) IMTV2 Actuator Connector, Harness Side	(-) Vehicle Battery
VPWR - Pin 1	Negative terminal

Is the voltage greater than 10.5 V?

Yes	No
GO to HU59.	REPAIR the open circuit and retest the vehicle.

HU59 CHECK THE IMTV2 CIRCUIT FOR AN OPEN IN THE HARNESS

Key in OFF position.
IMTV2 Actuator connector disconnected.
PCM connector disconnected.

Measure the resistance between:

(+) IMTV2 Actuator Connector, Harness Side	(-) PCM Connector, Harness Side
IMTV2 - Pin 2	IMTV2

Is the resistance less than 5 ohms?

Yes	No
GO to HU60.	REPAIR the open circuit and retest the vehicle.

HU60 CHECK THE IMTV2 CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS

Measure the resistance between:

(+) PCM Connector, Harness Side	(-)
IMTV2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to HU61.	REPAIR the short circuit to GND and retest the vehicle.

HU61 CHECK THE IMTV2 CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS

Measure the voltage between:

(+) PCM Connector, Harness Side	(-)
IMTV2	Ground

Is the voltage less than 1 V?

Yes	No
GO to HU62.	REPAIR the short circuit to PWR and retest the vehicle.

HU62 CHECK THE IMTV2 DRIVER CIRCUIT WITH THE PCM CONNECTED

IMTV2 Actuator connector disconnected.
PCM connector connected.
Key in ON position.

Connect a non-powered test lamp between:

(+) IMTV2 Actuator Connector, Harness Side	(-) IMTV2 Actuator Connector, Harness Side
VPWR - Pin 1	IMTV2 - Pin 2

Does the test lamp illuminate?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	GO to HU63.

HU63 CHECK THE IMTV2 PCM CIRCUIT WHEN COMMANDED ON

Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .

Connect a non-powered test lamp between:

(+) IMTV2 Actuator Connector, Harness Side	(-) IMTV2 Actuator Connector, Harness Side
VPWR - Pin 1	IMTV2 - Pin 2

Command the outputs ON.

Does the test lamp illuminate?

Yes	No
GO to HU64.	Key in OFF position. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

HU64 CHECK THE IMTV2 FOR DAMAGE

Key in OFF position.
Remove the IMTV2. REFER to ELECTRONIC ENGINE CONTROLS.
Visually inspect the shutter for damage.
Manually rotate the shutter.

Is a concern present?

Yes	No
INSTALL a new IMTV2 actuator and retest vehicle.	GO to HU65.

HU65 CHECK THE IMTV2 FOR FUNCTIONALITY WHEN COMMANDED ON

IMTV2 Actuator connector connected.
Key in ON position.
Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
Command the outputs ON.

Did the IMTV2 shutter rotate?

Yes	No
Key in OFF position. Intermittent concern. GO to PINPOINT TEST Z STEP 1 .	Key in OFF position. INSTALL a new IMTV2 actuator and retest vehicle.