V40 L4-1.9L Turbo VIN 29 B4204T3 (2002)
Vacuum Brake Booster Check Valve: Testing and Inspection
Vacuum pump and control valve, check
Special tools:
999 5230 PRESSURE METER See: Tools and Equipment/999 5230 Pressure Meter
Preparations
Remove the control valve from the brake booster.
Connect gauge 999 5230 PRESSURE METER See: Tools and Equipment/999 5230 Pressure Meter to the valve in the socket of the brake booster.
Remove the vacuum line at the induction pipe. Plug the socket of the induction pipe.
Note! When the ignition is on (engine not started) and a vacuum is created, the electric auxiliary pump is activated. It runs only a few seconds
due to the system relay.
Checking the vacuum control valve
Start the engine
See below, checking the control valve
Turn off the engine
Fit the vacuum line to the induction pipe.
Checking the vacuum pump
