| STEP | | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|
| 1 | Heater plugs absorption check | Check that the battery voltage is not below 12.6 V. Place the 1000 Amp ammeter probe for the Examiner on the heater plug lead in question.Turn the ignition on and check the current absorbed by the heater plug. The average rated peak current value absorbed should be around 30 AChecks must be carried out at a constant voltage of 11 VIf the heater plugs do not heat up correctly move on to Step 2 | Restore the electrical continuity for the supply leads for the heater plugs coming from the preheating control unit. |
| 2 | Heater plugs power supply check | With the ignition on (engine cold) check that the power supply for the individual heater plugs is correct during the preheating stage | Restore the electrical continuity for the supply leads and for the cable coming from the engine control unit and ensure the cables and the connections for the wiring involved are correctly fastened. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT If OK, replace the heater plugs control lunit. Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R If OK, replace the engine management control unit. Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 3 | Heater plugs check | Disconnect the wiring from the heater plug in question. Using the Examiner in the ohmmeter function, connect the probes between the body of the heater plug and the threaded end of the heater plug.Check that the resistance for each individual heater plug is between 0.5 and 1 Ohm at 20°C | Replace the heater plug. Op. 5520C10 HEATER PLUGS - R+R |
