| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
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| 1 | Turn the ignition key 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 may be considered over. Continue 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 14.8 V | Replace the alternator. Op. 5530A10 ALTERNATOR - R+R |
| 5 | Turn the ignition key OFF.Measure the voltage between the positive battery pole See A001 BATTERY and the earth, checking it is greater than 11 V | Carry out the See Test 5530BC BATTERY CHARGE CHECK |
| 6 | Turn the ignition ON and switch off all the consumers.Turn the ignition key OFF.Disconnect the wiring harness connector A from the engine control unit See M010 ENGINE MANAGEMENT ECU Turn the ignition key ON and earth Pin 25 of control unit wiring connector A several times. See M010 ENGINE MANAGEMENT ECU Connect a test bulb (21 W) and a multimeter in parallel and measure the voltage between pin 92 (wiring side) of control unit connector A. See M010 ENGINE MANAGEMENT ECU and Earth, checking it is greater than 11 VMove on to Step 12 | Move on to Step 7 |
| 7 | Turn the ignition key OFF.In the engine compartment junction unit See B001 JUNCTION UNIT , remove relay T9 from the base (centre of the bottom row).Connect a shunt cable with a fuse to Pins 30 and 87 of the base unit.Connect a test bulb (21 W) and a multimeter in parallel and measure the voltage between pin 92 of control unit connector A. See M010 ENGINE MANAGEMENT ECU and Earth, checking it is greater than 11 VMove on to Step 18 | Move on to Step 8 |
| 8 | Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 30 and 86 of the base unit and earth, checking that it is greater than 11 V.Move on to Step 18 | Move on to Step 9 |
| 9 | In the engine compartment junction unit See B001 JUNCTION UNIT , remove fuse F18 from the base unit (it is the second from the left in the bottom row).Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between the fuse input contact and earth, checking that it is greater than 11 V.Move on to Step 11 | Move on to Step 10 |
| 10 | If faults are present, repair or if necessary replace the electrical wiring between the engine compartment junction unit and the battery See E1010 POWER SUPPLY The test can be considered over | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 11 | Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. | The test can be considered over |
| 12 | Connect a test lamp (21 W) and a multimeter in parallel and measure the voltage between pin 8 of control unit connector A. See M010 ENGINE MANAGEMENT ECU and Earth, checking it is less than 11 V | Replace the engine management control unit Op. 1056F82 CONTROL UNIT SINGLE OF INJECTION IGNITION SYSTEM R R |
| 13 | Turn the ignition key OFF.In the engine compartment junction unit See B001 JUNCTION UNIT , remove fuse F21 from the base (third from the left in the lower row). Turn the ignition key to MAR.Connect a (21 W) test bulb and a multimeter in parallel and measure the voltage between the fuse input contact and earth, checking that it is less than 11 V. Continue to Step 15. | Move on to Step 14 |
| 14 | If faults are present, repair or, if necessary, replace the electrical wiring between the engine management control unit and the engine compartment junction unit. See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 15 | Turn the ignition key OFF.In the engine compartment junction unit See B001 JUNCTION UNIT , remove relay T10 from the base unit (it is the second from the left in the bottom row).Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 30 of the base unit and earth, checking that it is greater than 11 V. | Move on to Step 10 |
| 16 | Reinsert fuse F21 in the engine compartment junction unit base See B001 JUNCTION UNIT Connect a bridge with a fuse to Pins 30 and 87 of the base unit of relay T10.Connect a test bulb (21 W) and a multimeter in parallel and measure the voltage between pin 11 of the junction unit See B001 JUNCTION UNIT and Earth, checking it is greater than 11 V | Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 17 | Replace relay T10 | The test may be considered completed |
| 18 | Measure the resistance between Pin 85 of the base unit and Earth, ensuring it is greater than 500 kOhm | Move on to Step 10 |
| 19 | Measure the resistance between pin 85 of the base and pin 72 of control unit connector A See M010 ENGINE MANAGEMENT ECU , checking that it is less than 5 Ohm. Move on to Step 11 | Move on to Step 14 |