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

* Ignition ON, command the Intake Manifold Tuning Solenoid Valve ON and OFF with a scan tool and observe if anything interferes with the motion.
* 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 Fault if there is a condition with the circuit or a connection.

Reference Information
Schematic Reference

Engine Controls Schematics (LUW) [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Sunshade - Left (D6I)
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

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool DTC information. Verify that DTCs P0660 00, P2070 00, P2071 00, P2076 00, P2077 00, or P2078 00 are not set.

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

Circuit/System Testing

1. Ignition OFF, remove the Q22 Intake Manifold Tuning Solenoid Valve from the intake manifold, with the electrical connector connected.
2. Ignition ON, command the Intake Manifold Tuning Solenoid Valve ON and OFF with a scan tool. Verify that the Q22 Intake Manifold Tuning Solenoid Valve operates in both directions.

• If the Q22 Intake Manifold Tuning Solenoid Valve does not operate in both directions, replace the Q22 Intake Manifold Tuning Solenoid Valve.

3. 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.

4. Clean or replace the upper intake manifold.

Repair Instructions

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

Control Module References Control Module References for ECM replacement, programming and setup