Manifold Vacuum Check

1. Before inspection, set vehicles in the following condition:
- 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)
*: In vehicles for Canada, the headlight, tail light, etc. will remain lit even when the lighting switch is turned OFF but this is no problem.

2. Set up the tachometer or connect the scan tool to the data link connector.





3. Attach a three-way joint to the vacuum hose connected between the intake manifold plenum and the fuel pressure solenoid valve and connect a vacuum gauge.
4. Start the engine, and check that the curb idle speed is within the standard value range.

Standard value: 750 ± 100 r/min

5. Check the manifold vacuum.