| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|
| 1 | Turn the ignition ON. With the engine switched off and all the consumers switched off, the battery voltage should be between 11 and 13.5 V. | Move on to Step 4. |
| 2 | Turn the ignition key to the STARTING position and check that the battery voltage is more than 8 V | Move on to Step 4. |
| 3 | With the engine idling and warmed up, with all the consumers switched off, the battery voltage should be between 12 and 15 V.The test can be considered over | Move on to Step 4. |
| 4 | Start the engine and let the engine speed reach 3000 rpm.Measure the voltage between the positive battery pole See A001 BATTERY and the earth, checking that it is in a range between 13 and 15 V | Replace the alternator. Op. 5530A10 ALTERNATOR - R+R |
| 5 | Turn the ignition ON and switch off all the consumers.Turn the ignition OFF. Disconnect cable loom connector B from the engine management control unitTurn the ignition key to MAR.Connect a (10 W) test lamp and a multimeter in parallel and measure the voltage between pin 50 (wiring side) of the control unit See M010 ENGINE MANAGEMENT ECU and the Earth, checking it is greater than 11 V | There is a high transition resistance between the engine management control unit and the battery: clean or, if necessary, replace the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 6 | Connect a (10 W) test lamp and a multimeter in parallel and measure the voltage between pins 1, 2 and 3 (wiring side) of the control unit See M010 ENGINE MANAGEMENT ECU and the battery positive, checking it is greater than 11 V | There is a high transition resistance between the engine management control unit and the battery: clean or, if necessary, replace the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 7 | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R | |