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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1153 (Engine Controls - 3.6L (Ly7) (Troubleshooting & Diagnosis)) >> Troubleshooting >> Intake Manifold Runner Control System Diagnosis >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The number below refer to the step number on the diagnostic table.

  1. 2:  This diagnostic table will only diagnose the IMRC solenoid and the IMRC driver module. If there is a DTC set for the IMRC solenoid, refer to the appropriate DTC table.
  2. 5:  This step tests the IMRC driver module. The test lamp should turn ON and OFF when commanded with a scan tool. If the test lamp does not turn ON and OFF and there are no IMRC DTCs stored, replace the IMRC driver module.
Intake Manifold Runner Control System Diagnosis

Step Action Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1 Did you perform the Diagnostic System Check-Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the DTC information with a scan tool.
Is DTC P2008, P2009, or P2010 set?		 Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3
  1. Remove the intake manifold runner control (IMRC) solenoid from the intake manifold, but leave the electrical connector connected. Refer to Intake Manifold Runner Control Solenoid Replacement .
    2. IMPORTANT: The IMRC Command parameter may not change from OFF to ON or ON to OFF when using the IMRC output control.
  2. Command the IMRC solenoid ON and OFF with a scan tool.
  3. Observe the valve of the IMRC solenoid while you command the IMRC solenoid ON and OFF.
Does the valve of the IMRC solenoid move in both directions?		 Go to Step 4  Go to Step 5 
4
IMPORTANT: Inspect the IMRC solenoid valve for witness marks that indicate that the valve was hitting the intake manifold. This condition may be temperature related.
  1. Inspect the inside of the intake manifold for the following conditions:
    • For carbon build-up that limits the movement of the IMRC solenoid
    • For casting flash that limits the movement of the IMRC solenoid
    • For foreign material that limits the movement of the IMRC solenoid
  2. Clean or replace the upper intake manifold. Refer to Intake Manifold Replacement - Upper in Engine Mechanical - 3.6L (LY7).
Did you find and correct the condition?		 Go to Step 8  Go to Diagnostic Aids
5 
  1. Disconnect the IMRC solenoid connector.
  2. Connect a test lamp between the control circuit of the IMRC solenoid and the ignition 1 voltage circuit of the IMRC solenoid.
  3. Command the IMRC solenoid ON and OFF with a scan tool.
Does the test lamp turn ON and OFF as commanded?		 Go to Step 6  Go to Step 7 
6 Replace the IMRC solenoid. Refer to Intake Manifold Runner Control Solenoid Replacement .
Did you complete the replacement?		 Go to Step 8  -
7 Replace the IMRC driver module.
Did you complete the replacement?		 Go to Step 8  -
8
  1. Connect all disconnected components.
  2. Clear the DTCs with a scan tool.
  3. Start the engine.
  4. Operate the system in order to verify the repair.
Did you correct the condition?		 Go to Step 9  Go to Step 2 
9 Observe the capture info with a scan tool.
Are there any DTCs that have not been diagnosed?		 Go to Diagnostic Trouble Code (DTC) List System OK
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