| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|
| 1 | Solenoid valve resistance checkDisconnect the wiring from the solenoidCheck that the resistance between the two solenoid terminals is 16 ohm ±10% at 20 °C | Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
| 2 | Solenoid valve ducts checkConnect pressure/vacuum pump ( 3 ) n.° 2000015500 to connector A of the turbocharging pressure solenoidOperate the pump at a vacuum below 0.50 bar (to prevent damaging the solenoid valve)Check that the flow of air between connectors A and B is impeded (internal passage closed)Connect the terminals of the solenoid to a 12 volt battery using disconnector (4) AD 233 N° 1806387000Operate the pump at a vacuum below 0.50 bar (to prevent damaging the solenoid valve)Check that nothing is preventing the flow of air between connectors A and B (internal passage open) | Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
| 3 | Pressure control solenoid valve signal checkConnect an Examiner in Voltmeter modeConnect disconnector (4) AD 233 N° 1806387000 across the solenoid and the wiringInsert the red probe at pin 2 of the disconnector and the black probe at pin 1 of the disconnectorSet the Examiner time base at 2 seconds and 20 V f.s.d.Start the engineCheck for a square wave signal as illustrated in the graph | Restore the continuity of the wiring between the engine control unit and the solenoidRestore the correct power supply to the solenoid See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT If the signal is interrupted at the control unit output.Replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
