Intake Manifold Runner Control System Diagnosis

Intake Manifold Runner Control System Diagnosis

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

Circuit/System Description

An intake manifold tuning solenoid valve is used to change the intake manifold plenum configuration. When the intake manifold tuning solenoid valve is open, the intake manifold is configured to one large plenum. When the intake manifold tuning solenoid valve is closed, the intake manifold is configured to 2 smaller plenums. The intake manifold tuning solenoid valve improves engine performance at low and high engine speeds.

Ignition voltage is supplied directly to the intake manifold tuning solenoid valve. 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.

The intake manifold tuning solenoid valve also contains a position sensor which is used to detect the actual position of the intake manifold tuning solenoid valve in relation to its commanded position. The ECM supplies the intake manifold tuning solenoid valve position sensor with a 5 V signal circuit and the position sensor uses a common ground circuit. The position sensor enables the ECM to detect a physically broken or stuck intake manifold tuning solenoid valve.

Diagnostic Aids

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit test status parameters for the component. A circuit test status parameter will change from OK or Not Run to Malfunction if there is a condition with the circuit or a connection.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, observe the scan tool DTC information. Verify that DTCs P0660, P2070, P2071, P2076, P2077, or P2078 are not set.

• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

2. Command the Intake Manifold Tuning Valve ON with a scan tool. The intake manifold tuning valve actuator should move to the closed position.

Circuit/System Testing

1. Inspect the linkage between the Q22 Intake Manifold Tuning Solenoid Valve and the valve at the intake manifold for the conditions listed below:

* Linkage for being connected

* Linkage binding

* Interference with hoses, wiring, or any other components

• If a condition is found, repair as necessary.

2. Remove the linkage from the Q22 Intake Manifold Tuning Solenoid Valve.

3. Ignition ON, disconnect the harness connector at the Q22 Intake Manifold Tuning Solenoid Valve and then reconnect. The Q22 Intake Manifold Tuning Solenoid Valve should move. Repeat procedure several times.

• If the solenoid did not move, replace the intake manifold.

4. Inspect the inside of the intake manifold for the following conditions:

* Carbon build-up that limits the movement of the Q22 Intake Manifold Tuning Solenoid Valve.

* Casting flash that limits the movement of the Q22 Intake Manifold Tuning Solenoid Valve.

* Foreign material that limits the movement of the Q22 Intake Manifold Tuning Solenoid Valve.

• If a condition is found, repair as necessary.

5. If all components test normal, clean or replace the intake manifold.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Intake Manifold Replacement