P2008

DTC P2008, P2009, or P2010

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC P2008
- Intake Manifold Runner Control (IMRC) Solenoid Control Circuit

DTC P2009
- Intake Manifold Runner Control (IMRC) Solenoid Control Circuit Low Voltage

DTC P2010
- Intake Manifold Runner Control (IMRC) Solenoid Control Circuit High Voltage




Diagnostic Fault Information






Circuit/System Description

An intake manifold runner control (IMRC) valve is used to change the intake manifold plenum configuration. When the IMRC valve is open, the intake manifold is configured to one large plenum. When the IMRC valve is closed, the intake manifold is configured to two smaller plenums. The IMRC valve improves engine performance at low and high engine speeds.


Ignition voltage is supplied directly to the IMRC solenoid. The engine control module (ECM) controls the solenoid by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.


Conditions for Running the DTC

* The ignition is ON or the engine is operating.
* The IMRC solenoid has been commanded ON and OFF at least once during the ignition cycle.
* The DTCs run continuously once the above condition is met.



Conditions for Setting the DTC

The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than a cumulative of 50 seconds.


Action Taken When the DTC Sets

DTCs P2008, P2009, and P2010 are Type C DTCs.


Conditions for Clearing the DTC

DTCs P2008, P2009, and P2010 are Type C DTCs.


Diagnostic Aids

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the circuit status for the component with a scan tool. The circuit status parameter changes from OK or Indeterminate to Fault if there is a condition with the circuit or a connection.


Reference Information
Schematic Reference

Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Air Intake System Description (Air Intake System Description)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

1. Ignition On, command the IMRC solenoid ON and OFF with a scan tool. You should hear and feel an audible click.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the IMRC solenoid.
2. Ignition ON, test for B+ between the ignition voltage circuit terminal E and ground.

• If less than B+, repair the ignition voltage circuit of the IMRC solenoid for a short to ground or an open/high resistance. Replace the fuse, if necessary.

3. Ignition OFF, connect a test lamp between the control circuit terminal C and the ignition voltage circuit terminal E.

Important: The control circuit for the IMRC solenoid is pulled-up to voltage within the ECM, 2.0-3.0 volts on the control circuit is normal.


4. Ignition ON, command the IMRC solenoid ON and OFF with a scan tool . The test lamp should turn ON and OFF.

• If the test lamp remains ON all the time, test for a short to ground on the control circuit. If circuit/connections test normal, replace the ECM.


• If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the control circuit. If circuit/connections test normal, replace the ECM.

5. Test for 2.0-3.0 volts between the control circuit terminal C and ground.

• If the voltage is not within the specified range, replace the ECM.

6. Connect a test lamp between the ground circuit terminal D and B+. The test lamp should illuminate.

• If the test lamp does not illuminate, repair the open/high resistance in the ground circuit of the IMRC solenoid.

7. If all circuits/connections test normal, replace the IMRC solenoid.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Intake Manifold Runner Control Solenoid Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for engine control module replacement, setup, and programming