939010293 - 5530BB BATTERY VOLTAGE CHECK

CHECK TO BE PERFORMEDRESOLUTION IF THE CHECK IS NOT OK
1Turn 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
2Turn the ignition key to the STARTING position and check that the battery voltage is more than 8 VMove on to Step 4
3With the engine idling and warmed up, with all the consumers switched off, the battery voltage should be between 12 and 15 V. The test is considered overMove on to Step 4
4Start the engine and let it reach a speed of 3000 rpm. Measure the voltage between the positive battery pole and the earth, checking that it is between 13 and 14.8 V    See A001 BATTERY Replace the alternator.    Op. 5530A10 ALTERNATOR - R+R
5Position the ignition key on STOP. Measure the voltage between the battery positive terminal and Earth, checking it is greater than 11 V.    See A001 BATTERY Carry out    See Test 5530BC BATTERY CHARGE CHECK
6Turn 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 72 of control unit wiring connector A several times.    See M010 ENGINE MANAGEMENT ECU Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 1 and 5 of the control unit connector A and earth, checking that it is greater than 11 V.    See M010 ENGINE MANAGEMENT ECU Move on to Step 12Move on to Step 7
7Turn the ignition key OFF.In the engine compartment junction unit, remove relay T9 from the base unit (in the middle of the lower row)    See B001 JUNCTION UNIT Connect a shunt cable with a fuse to Pins 30 and 87 of the base unit.Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 1 and 5 of the control unit connector A and earth, checking that it is greater than 11 V.    See M010 ENGINE MANAGEMENT ECU Move on to Step 18Move on to Step 8
8Connect 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 18Move on to Step 9
9In the engine bay junction unit, remove fuse F17 from the base block (fourth from the right in the lower row).    See B001 JUNCTION UNIT 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 11Move on to Step 10
10If 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 overReplace the junction unit    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
11Replace the engine compartment junction unit    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. The test can be considered over
12Connect a (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 28 of the control unit connector A and earth, checking that it is less than 11 V.    See M010 ENGINE MANAGEMENT ECU Replace the engine management control unit    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R
13Turn the ignition key OFF.In the engine bay junction unit, remove fuse F16 from the base block (third from the right in the lower row).    See B001 JUNCTION UNIT Turn the ignition key ON.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.Move on to Step 15Move on to Step 14
14If faults are present, repair or, if necessary, replace the electrical wiring between the engine compartment junction unit and the engine control unit.    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered overReplace the junction unit    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
15Turn the ignition key OFF.In the engine bay junction unit, remove relay T10 from the base unit (it is the second from left in the bottom row).    See B001 JUNCTION UNIT 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
16Reinsert fuse F16 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 (21 W) test lamp and a multimeter in parallel and measure the voltage between pins 11 of the junction unit and earth, checking that it is greater than 11 V.    See B001 JUNCTION UNIT Replace the engine compartment junction unit    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
17Replace relay T10    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. The test may be considered completed
18Measure the resistance between Pin 85 of the base unit and Earth, ensuring it is greater than 500 kOhmMove on to Step 10
19Measure the resistance between Pin 85 of the base unit and Pin 72 of control unit connector A to ensure it is less than 5 Ohms    See M010 ENGINE MANAGEMENT ECU Move on to Step 11Move on to Step 14