For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category

### DTC Descriptors

DTC P2008: Intake Manifold Runner Control Solenoid Circuit Malfunction
DTC P2009: Intake Manifold Runner Control Solenoid Circuit Low Voltage
DTC P2010: Intake Manifold Runner Control Solenoid Circuit High Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Ignition 1 Voltage | P2009¹ | P2008 | -- | --
IMRC Control Circuit | P2009 | P2008 | P2010 | --
¹Opens the fuse that supplies voltage to the IMRC solenoid.

### Circuit/System Description

An ignition 1 voltage is supplied directly to the intake manifold runner (IMRC) solenoid. The engine control module (ECM) controls the IMRC solenoid by grounding the control circuit via an internal driver. The primary function of the driver is to supply ground for the IMRC solenoid. The ECM can determine if the control circuit is open, shorted to ground or shorted to a voltage by monitoring the voltage on the control circuit.

### Conditions for Running the DTC

• | The ignition is ON or the engine is operating.

• | 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 more than 2 seconds.

### Action Taken When the DTC Sets

DTCs P2008, P2009 and P2010 are type B DTCs.

### Conditions for Clearing the DTC

DTCs P2008, P2009 and P2010 are type B DTCs.

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References

### Circuit/System Verification

1. Ignition On, using a scan tool command the IMRC solenoid ON and OFF. You should hear and feel an audible click.
2. If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

### Circuit/System Testing

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

⇒ | If less than B+, repair the ignition 1 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 and the ignition 1 voltage circuit of the IMRC solenoid.
4. Ignition ON, using a scan tool command the IMRC solenoid. The test lamp should pulse ON and OFF.

⇒ | If the test lamp remains illuminated 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. If all circuits/connections test normal, replace the IMRC solenoid.

### Repair Instructions

Perform the Diagnostic Repair Verification.

• | Intake Manifold Runner Control Solenoid Replacement

• | Engine Control Module Replacement for engine control module replacement, setup and programming.