Visual/Physical Inspection
- Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning.
- Verify that the ECM ground connections are clean and properly tightened.
- Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
- Was a problem found in any of the above areas?
YES
- Replace or repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Go to next step as below