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Engine General Information and Diagnosis: 1A-105 Test 2: Low pressure circuit check S5JB0B1104167 Step Action Yes No 1 Check the fuel filter: cartridge. • Positioning and condition of the seals. Replace the fuel filter, bleed the circuit and continue the Is there in good condition? Go to Step 2. Repair or replace the 2 Supplying the injection system with fuel from an additional and seal it with a plug. • Connect a pipe to the fuel filter inlet and insert the other end in a clean container of approximately 5 liters. • Disconnect the diesel fuel return pipe at the pump return and injector leak-off junction and seal it with a plug. • Fill the container with clean diesel fuel. (there must not be any air bubbles in the return pipe). Does the customer complaint persist? If the low pressure Go to Step 3. 3 Are the low pressure circuit connections in order and in good Go to Step 4. Carry out the necessary 4 Check the condition of the priming pump, and that it is Is there in good condition? Go to Step 5. Repair or replace the 5 If the fault is still present with a low fuel level, check the underneath it. Check that the opening of the venturi (6 to 8 mm (0.24 to Is there in good condition? Go to Step 6. Repair or replace the 6 Ensure that the correct fuel is being used: to detect petrol, solvent, thinner, sulphuric acid (fuel with a If the diesel fuel is not correct: Is there in good condition? Low-pressure circuit Repair or replace the |