3022584 - D10 ENGINE IDLE IRREGULAR
-| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Preliminarily check:
| Continue to Step 1 | Spark plugs dirty or defective | Replace the spark plugs Op. 5510D10 | |
| Leads defective | Replace the spark plug leads | |||
| Air filter blocked | Replace the filter element Op. 1048A14 | |||
| Fault in air intake circuit | Restore the 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. check
| Continue to Step 2 | 'Supply system' error detected | See table Z50 MIXTURE STRENGTH ERROR | |
| Another error dectected in the control unit | Continue following the instructions for the diagnostic equipment | |||
| Inconsistent parameter | Continue following the instructions for the diagnostic equipment | |||
| 2 | IDLE ACTUATOR CHECK | All OK | Problems met | Operation |
| Check that the system carries out the correct idle learning procedure | Continue to Step 3 | Irregular idling | Carry out the idle learning procedure correctly | |
| 3 | PETROL VAPOUR RECOVERY SYSTEM CHECK | All OK | Problems met | Operation |
| Check the condition and seal of the petrol vapour recovery pipes | Continue to Step 4 | Air seepage | Restore the correct seal | |
| Pipe between filter and intermediate coupling broken | Replace the pipe Op. 1080E61 | |||
| Pipe between intermediate coupling and solenoid valve 1 Restore the correct seal | Replace the pipe Op. 1080E63 | |||
| 4 | PETROL VAPOUR RECOVERY SOLENOID VALVE CHECK | All OK | Problems met | Operation |
| Carry out active diagnosis of solenoid | Continue to Step 6 | Solenoid not working | Continue to Step 5 | |
| 5 | SOLENOID VALVE ELECTRICAL CIRCUIT CHECK | All OK | Problems met | Operation |
| Check supply and earth of petrol vapour recovery solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 6 | Solenoid valve faulty | Replace the solenoid valve Op. 1080E28 | |
| Connections not correct | Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 6 | BRAKE SERVO AND PIPE CHECK | All OK | Problems met | Operation |
Check condition of:
| Continue to Step 7 | Brake servo pipe defective | Replace the pipe Op. 3330D26 | |
| Brake servo defective | Replace the brake servo/pump assembly Op. 3330D02 | |||
| 7 | CHECK ON FUEL PRESSURE | All OK | Problems met | Operation |
| Check the fuel supply pressure Op. 0510C10 | Continue to Step 8 | Insufficient fuel pressure: pipe obstructed | Eliminate the blockage; if necessary replace the pipe Op. 1040B30 | |
| Low fuel pressure: clogged filter | Replace the pump assembly Op. 1040A70 | |||
| Insufficient fuel pressure: regulator out of calibration | Replace the pump assembly Op. 1040A70 | |||
| Low fuel pressure: defective pump | Replace the pump assembly Op. 1040A70 | |||
| 8 | CHECK THE VARIABLE VALVE TIMING SOLENOID | All OK | Problems met | Operation |
| 1.6 TS 120 CV | Carry out active diagnosis of variable valve timing | Continue to Step 10 | Solenoid not working | Continue to Step 9 |
| 2.0 TS | Carry out active diagnosis of variable valve timing | Continue to Step 10 | Solenoid not working | Continue to Step 9 |
| 9 | CHECK VARIABLE VALVE TIMING ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| 1.6 TS 120 CV | Check power and earth of variable valve timing system solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 10 | Variable valve timing faulty | Replace the phase transformer Op. 1036C40 |
| Connections not correct | Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 2.0 TS | Check power and earth of variable valve timing system solenoid See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 10 | Variable valve timing faulty | Replace the phase transformer Op. 1036C40 |
| Connections not correct | Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 10 | TIMING VARIATOR CHECK | All OK | Problems met | Operation |
| 1.6 TS 120 CV | Check the operation of the variable valve timing system by powering the solenoid of the variator directly.There must be a significant variation in engine speed (surging or very irregular idling) | Continue to Step 11 | No speed changes: variable valve timing stuck | Replace the phase transformer Op. 1036C40 |
| 2.0 TS | Check the operation of the variable valve timing system by powering the solenoid of the variator directly.There must be a significant variation in engine speed (surging or very irregular idling) | Continue to Step 11 | No speed changes: variable valve timing stuck | Replace the phase transformer Op. 1036C40 |
| 11 | CHECK ON TIMING | All OK | Problems met | Operation |
| Check that the timing is correct | Continue to Step 12 | Timing not correct | Restore the correct timing Op. 1032B10 | |
| 12 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists: control unit defective | Replace control unit Op. 1056B82 | |