Test Sequence
-- Follow all safety precautions. Refer to SAFETY PRECAUTIONS .
-- Follow the guidelines for clean working conditions. Refer to PARKING/AUXILIARY HEATER AND FUEL SYSTEM CLEAN WORKING CONDITIONS .
-- Remove the engine cover. Refer to REMOVAL AND INSTALLATION .
Vehicles with Engine Code CJAA
-- Open the clamp and remove the fuel supply line -arrow- from the high pressure pump.
-- Unlock and disconnect the connector from the Auxiliary Fuel Pump -V393- or from Fuel Pump 2 -V277- (inline electric fuel pump) inside the engine compartment.
Continuation for all Vehicles:
-- Insert the Diesel Pressure Tester Kit - Adapter Set - Adapter 1 VAS 6551/5-1 into the supply line and secure with a clamp.
-- Connect the Diesel Pressure Tester Kit - Hose 2 VAS 6551/2 between the Diesel Pressure Tester Kit - Adapter Set - Adapter 1 VAS 6551/5-1 and the connection >>A<< of the Diesel Pressure Tester Kit VAS 6551.
-- Connect the Diesel Pressure Tester Kit - Hose 1 VAS 6551/1 between the connection >>B<< of the Diesel Pressure Tester Kit - Adapter Set - Connection Hose 2 VAS 6551/5-2 and the high pressure pump.
-- Press the On/Off button to switch on the Diesel Pressure Tester Kit VAS 6551.
-- Open the shut-off valves -A- and -B- on the Diesel Pressure Tester Kit VAS 6551 in the direction of flow.
-- Close cut-off tap -C-.