| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|
| 1 | Turn the ignition key OFF.Reconnect all the disconnected components.Turn off all the electrical users.Insert a new fuse F11 in the engine compartment junction unit and check it does not blow.Move on to Step 3 | Move on to Step 2 |
| 2 | If necessary, repair errors in the wiring between the engine compartment junction unit and spark plug control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENTThe test can be considered over | Replace the glow plug preheating control unit Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R |
| 3 | Turn the ignition key ON.Check that fuse F11 cuts in | A temporary current overload has occurred in the circuit behind fuse F11. check the electrical connections for the junction unit |
| 4 | Turn the ignition key OFF.Disconnect the harness from a spark plug.Fit a new fuse F11 and check it does not blow.Reconnect the spark plugs and disconnect another, repeating the test until all the spark plugs have been checked. | Replace the spark plug that does not trigger the fuseOp. 5520C10 HEATER PLUGS - R+R |
| 5 | If necessary, repair the faults in the wiring between the spark plug control unit and the glow plugs See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | Replace the glow plug preheating control unit Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R |