3360209 - D10 ENGINE IDLE IRREGULAR
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
First check:
| Continue to Step 1 | Air filter clogged | Replace the filter element Op. 1048A14 | |
| Faulty in the air intake circuit | Restore correct operation of the intake circuit | |||
| 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 | |||
| Incoherent parameter | Continue following the instructions for the diagnostic equipment | |||
| 2 | CHECK ON PETROL VAPOUR RECOVERY SYSTEM | All OK | Problems met | Operation |
| Check the condition and the seal of the pipe between the canister solenoid valve and the intake manifold | Continue to Step 3 | Air leaks | Renew the correct seal | |
| Pipe between solenoid valve and manifold damaged | Replace the pipe | |||
| 3 | CHECK ON PETROL VAPOUR RECOVERY SOLENOID | All OK | Problems met | Operation |
| Carry out active diagnosis of solenoid | Continue to Step 5 | Faulty solenoid | Continue to Step 4 | |
| 4 | CHECK ON SOLENOID ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| Check supply and earth of petrol vapour recovery solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 5 | Solenoid valve faulty | Replace the solenoid valve Op. 1080E28 | |
| Solenoid valve faulty | Restore connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 5 | CHECK ON BRAKE SERVO AND PIPE | All OK | Problems met | Operation |
| Check the condition of the brake servo vacuum pipes; See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT Check the operation of the single-active valve and the brake servo See Test 3330DA Check operation of brake servo | Continue to Step 6 | Brake servo pipe faulty | Replace the pipe | |
| Brake servo faulty | Replace the brake servo/pump assembly | |||
| 6 | CHECKING FUEL PRESSURE | All OK | Problems met | Operation |
| 1.8 16v 2.4 20v | Check the fuel supply pressure Op. 0510C10 | Continue to Step 7 | Insufficient fuel pressure: pipe blocked | Eliminate the blockage; if necessary replace the pipesIf necessary, replace the actuator |
| Insufficient fuel pump: pump faulty | Replace pump assembly Op. 1040A70 | |||
| 1.2 16v 1.6 16v | Check the fuel supply pressure Op. 0510C10 | Continue to Step 10 | Insufficient fuel pressure: pipe blocked | Eliminate the blockage; if necessary replace the pipes |
| Insufficient fuel pump: pump faulty | Replace pump assembly Op. 1040A70 | |||
| 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 | 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.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 Op. 1036C40 |
| 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 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' | ||