System Testing

Fig. 16 Disconnect intake air temperature switch.:

1. Disconnect electrical connector at intake air temperature sensor Fig 16.

Fig. 17 Disconnect vacuum sensing tube.:

2. Disconnect the vacuum sensing tube from the pressure regulator control solenoid valve Fig. 17.
3. Connect tachometer to engine.
4. Start engine and ensure engine speed is 850 RPM for 60 seconds, after 60 seconds engine speed should drop to 800 RPM.

Fig. 18 Air at pressure regulator control solenoid valve.:

5. For 60 seconds after engine is started be sure air is not sucked at pressure regulator control solenoid valve Fig. 18.
6. After 60 seconds be sure air is sucked at pressure regulator control solenoid valve.