Component Tests and General Diagnostics

1. Before inspection, set vehicles in the following conditions:
- Engine coolant temperature: 80 - 95° C (176 - 203° F)
- Lights, electric cooling fan, and accessories: OFF
- Transaxle: Neutral (P range on vehicles with A/T)
2. Connect a tachometer or connect a scan tool to the data link connector.





3. Attach a three-way union to the vacuum hose between the fuel pressure regulator and the intake manifold plenum, and connect a vacuum gauge.
4. Start the engine and check that idle speed is within specifications. The idle speed should be 650 - 850 RPM and vacuum should be a minimum of 60 kPa (18 inch Hg).