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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 330 (Engine Controls - Self-Diagnostics - 3.0L) >> Diagnostic Tests >> DTC P2008: Intake Manifold Runner Control Solenoid Control >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS .
  2. Turn ignition on, with engine off. Using scan tool, command the IMRC solenoid ON and OFF. Does the IMRC solenoid click with each command? If yes, go to next step. If no, go to step  4.
  3. Observe the Freeze Frame/Failure Records for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within the Conditions for Running the DTC or as close to the Freeze Frame/Failure Records that you observed. See CONDITIONS FOR RUNNING DTC . Did the DTC fail this ignition? If yes, go to next step. If no, problem is intermittent. Refer to INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE article.
  4. Turn ignition off. Disconnect the IMRC solenoid. Turn ignition on, with engine off. Probe the battery voltage circuit of the IMRC solenoid with a test light that is connected to a good ground. Does the test light illuminate? If yes, go to next step. If no, go to step  9.
  5. Connect a test light between the control circuit of the IMRC solenoid and the battery voltage circuit of the IMRC solenoid. Command the IMRC solenoid ON and OFF with a scan tool. Does the test light turn ON and OFF? If yes, go to step  7. If no, go to next step.
  6. Test the control circuit of the IMRC solenoid for a short to voltage. Did you find and correct the condition? If no, go to step  12. If yes, go to step  8.
  7. Test for an intermittent and for a poor connection at the IMRC solenoid. Did you find and correct the condition? If yes, go to step  12. If no, go to step  10.
  8. Test for an intermittent and for a poor connection at the ECM harness connector. Did you find and correct the condition? If yes, go to step  12. If no, go to step  11.
  9. Repair open or short to ground in the battery voltage circuit of the IMRC solenoid. After repairs, go to step  12.
  10. Replace IMRC solenoid. After replacing solenoid, go to step  12.
  11. Replace ECM. Perform ECM relearn procedures. See ENGINE CONTROL MODULE  under PROGRAMMING. After replacing ECM, go to next step.
  12. Clear the DTCs with a scan tool. Turn ignition off for 30 seconds. Start engine. Operate vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING DTC . Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  13. Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? If yes, diagnose affected DTC(s). See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are displayed, system is okay.
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