| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the Examiner in active diagnosis, check that the heater plugs warning light is working properly | Move on to Step 2 | The warning light does not flash. | Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Check for the presence of any faults by connecting to the engine management control unit using the Examiner. | Move on to Step 3 | Presence of faults. | Continue as instructed by the diagnostic equipment. |
| 3 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check that the electrical power supply for the heater plugs control unit is correctCheck the continuity of the wiring between the heater plugs control unit and the engine management control unitCheck that the glow plugs are working properly. | Move on to Step 4 | 1. Fault in positive electrical supply and/or earth from glow plug preheating control unit.2. Heater plugs defective3. Heater plugs control unit defective. | 1. Restore correct power supply.2. Restore the damaged wiring to correct operation.3. Replace glow plugs4. Replace glow heater plug control unit Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R |
| 4 | ENGINE CONTROL UNIT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the engine control unit is working properly. | End of diagnosis. | Engine control unit defective | Replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 5 | HEATER PLUGS SYSTEM CHECK | All OK | Problems encountered | Operation |
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| Check that the connection between the heater plugs control unit and the heater plugs is correctCheck that the heater plugs are working properly, measuring the absorption by carrying out Test_5520CA. See Test 5520CA GLOW HEATER PLUGS OPERATION CHECK | Move on to Step 5. | 1. Wiring defective.2. Heater plugs defective3. Heater plugs control unit defective | 1. Restore the correct wiring.2. Replace the glow plugs3. Replace glow heater plug control unit Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R |
| 6 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the node power supply/electrical connection/s are correct.Check the wiring (network) between the Engine Management, Body Computer and Instrument Panel nodes. In particular, check that each individual pin is properly connected on each node. | Move on to Step 7 | 1. Fault in positive electrical supply and/or earth.2. Electrical connections not operational.3. Engine control unit defective | 1. Restore correct power supply.2. Repair wiring.3. Replace the Engine Management Node Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 7 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|
| Use an Examiner to check the possibility of connection to the Body Computer Node | End of diagnosis. | Check that the body computer is working properly. | Faulty Body Computer. Replace Body Computer. Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |
