3360208 - D05 ENGINE DOES NOT PRODUCE BEST PERFORMANCE
There are decreases in performance during acceleration| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
First check:
| Continue to Step 1 | Air intake circuit check | Eliminate the problem, if necessary replacing the filter element Op. 1048A14 | |
| Pipe obstructed | Restore the operation of the exhaust pipe | |||
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socket. Verify:
| Continue to Step 2 | 'Fuel system' error appears | See table Z50 MIXTURE STRENGTH ERROR | |
| Another error dectected in the control unit | Continue following the instructions for the diagnostic equipment | |||
| Another error dectected in the control unit | Continue following the instructions for the diagnostic equipment | |||
| 2 | ROAD TEST WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Carry
out a road test keeping the diagnostic equipment connected Verify:
| Continue to Step 3 | 'Fuel system' error appears | See table Z50 MIXTURE STRENGTH ERROR | |
| Sudden occurrence of another error detected | Continue following the instructions for the diagnostic equipment | |||
| Sudden occurrence of another error detected | Continue following the instructions for the diagnostic equipment | |||
| 3 | FUEL PRESSURE ROAD TEST | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Road test the vehicle and check the fuel supply pressure in the conditions that lead to the anomaly Op. 0510C10 | Continue to Step 4 | Insufficient fuel presure: pipes obstructed | Eliminate the obstructions |
| Insufficient fuel pump: pump faulty | Replace pump assembly Op. 1040A70 | |||
| 1.2 16v 1.6 16v | Road test the vehicle and check the fuel supply pressure in the conditions that lead to the anomaly Op. 0510C10 | Continue to Step 10 | Insufficient fuel presure: pipes obstructed | Eliminate the obstructions |
| Insufficient fuel pump: pump faulty | Replace pump assembly Op. 1040A70 | |||
| 4 | MODULAR MANIFOLD SOLENOID CHECK | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Carry out active diagnosis of modular manifold solenoid | Continue to Step 6 | Faulty solenoid | Continue to Step 5 |
| 5 | MODULAR MANIFOLD SOLENOID CIRCUIT CHECK | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Check the supply and earth of the modular manifold solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 6 | Solenoid valve faulty | Replace the solenoid valve |
| Connections not correct | Restore connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 6 | CHECK MODULAR MANIFOLD | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Check the modular manifold is working properly. | Continue to Step 7 | Pneumatic actuator not working. | Restore the correct connection See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT If necessary, replace the actuator |
| Faulty manifold | Replace the manifold | |||
| 7 | Check variable valve timing system manifold | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Carry out active diagnosis of variable valve timing | Continue to Step 9 | Faulty solenoid | Continue to Step 8 |
| 8 | CHECK ON TIMING VARIATOR ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Check power and earth of variable valve timing system solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 9 | Variable valve timing system faulty | Replace the phase transformer |
| Connections not correct | Restore connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 9 | CHECKING VARIABLE VALVE TIMING SYSTEM | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Check the operation of the variable valve timing system by powering the solenoid of the variator directly during idling.There must be a significant change in engine speed (surging or very irregular idle) | Continue to Step 10 | There are no changes in engine speed: timing variator stuck | Replace the phase transformer |
| 10 | CHECKING TIMING | All OK | Problems met | Operation |
| Check that the timing is correct | Continue to Step 11 | Timing incorrect | Restore the correct timing | |
| 11 | CHECKING CYLINDER COMPRESSION | All OK | Problems met | Operation |
| Carry out the cylinder compression test Op. 0510A10 | Continue to Step 13 | Insufficient cylinder compression | Continue to Step 12 | |
| 12 | CHECKING CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems met | Operation |
| Carry out R/R on head to check the valve sealCheck the condition of the cylinders/piston rings | Continue to Step 13 | Insufficient valve seal | Overhaul the cylinder head | |
| Cylinders/piston rings worn | Repair the leak | |||
| 13 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | Fault persists: control unit defective | Replace control unit Op. 1056B82 Search for the fault starting from another symptom' | ||