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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls - 3.6L - Troubleshooting & Diagnosis) >> Troubleshooting >> Intake Manifold Runner Control System Diagnosis >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

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

  1. 2:  This diagnostic table will only diagnose the mechanical portion of the IMRC solenoid. If there is a DTC set for the IMRC solenoid, refer to the appropriate DTC table.
Intake Manifold Runner Control System Diagnosis

Step Action Values Yes No
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
  1. Inspect the inside of the intake manifold for the following conditions:
    • For carbon build-up that limits the movement of the IMRC valve
    • For casting flash that limits the movement of the IMRC valve
    • For foreign material that limits the movement of the IMRC valve
  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 6  Go to Diagnostic Aids
5 Replace the IMRC solenoid. Refer to Intake Manifold Runner Control Solenoid Replacement .
Did you complete the replacement?		 - Go to Step 6  -
6
  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 7  Go to Step 2 
7 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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