The vacuum pump is a multifunctional device used for diagnostics of systems in cars and technology, the operation of which is based on pressure or vacuum. It is equipped with accessories that enable use in almost any engine or system. Measurement range: -1 to 0 bar.

Intended use / Application

Using the pump, you can carry out diagnostics, among others of the following systems and systems

Computerized engine control devices:

• Barometric pressure sensor (BARO)
• PCV system
• Exhaust gas recirculation (EGR) system
• Thick film pressure sensors (MAP)

Ignition control devices:

• Vacuum ignition advance
• Delay valve: SDV, RCV

System brakes:

• Classic brakes
• ABS brakes
• Air brakes
• Brake lines
• Brake servo

Other systems:

• Air conditioning
• Cruise control
• Fuel tank and fuel system
• Vacuum door closing system.

How to use

Exhaust Gas Recirculation (EGR) Diagnostics
An EGR system valve is an example of a vacuum-actuated valve. In the absence of a vacuum, the valve is closed and the exhaust gases do not come out of the valve. When the vacuum is applied to the valve, it opens to allow exhaust gas recirculation.

Thick Film Pressure Sensor (MAP) Diagnosis

• Assemble the pump and reservoir system for bleeding the brake calipers, then connect to the sensor vacuum port.
• Press the pump lever until the needle shows -0.5 bar. Stop pumping and watch the pointer, it should be stationary. If the needle moves, the MAP sensor is defective.
• During operation, the MAP sensor sends feedback signals to the control computer. The signal has a frequency between 85 Hz and 160 Hz depending on the vacuum level. A frequency meter is necessary to measure the frequency, it must be connected in accordance with the instructions of the sensor and the meter.

Bleeding the brake calipers.

• Make sure that the brake expansion tank is filled with fluid to the nominal volume.
• Bleed the air in the following order:
• The master cylinder, if equipped with a bleed valve
• The brake calipers in the sequence from the one closest to the master cylinder to the furthest one
• Connect the short hose to the connection on the underside of the pump reservoir cover.
• Close the pump reservoir with the lid.
• Connect long hoses to the cover connections. Connect the end of one of the long hoses to the pump and the other end to the bleeding valve (calipers) of the brake caliper. Use an adapter if necessary.
• Press the pump lever 10-15 times to create a vacuum in the pump reservoir.
• Open the air vent valve 1/4 - 1/2 turn so that the pump reservoir is about 5 cm full of fluid. Tighten the vent valve.
• Disconnect the pump hose from the bleed valve, the clamp bleeding procedure is complete.
• Before repeating the bleeding procedure in the next caliper, drain the brake fluid from the pump reservoir and top up the brake fluid level in the brake system to the nominal level.

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