| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|
| 1 | Solenoid valve resistance checkDisconnect the wiring for the solenoid valve. Check that the resistance between the two terminals of the solenoid valve is 30 ohm ±10% at 20 °C (FIG.1). | Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
| 2 | Solenoid valve ducts checkConnect to connector 3 of the supercharging pressure solenoid valve using the vacuum pump (FIG.1) n.° 2000015500Operate the pump at a pressure below 0.50 bar (to prevent damaging the solenoid valve)Check that nothing is preventing the flow of air between connectors 3 and 2 | Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
| 3 | Solenoid valve operation checkConnect to connector 1 of the supercharging pressure solenoid valve using the vacuum pump (FIG.1) n.° 2000015500Operate the pump at a pressure below 0.50 bar (to prevent damaging the solenoid valve)Check that nothing is preventing the flow of air between connectors 1 and 2Connect the terminals of the solenoid valve to a 12 volt battery (using disconnector AD 233 N° 1806387000)Operate the pump at a pressure below 0.50 bar (to prevent damaging the solenoid valve)Check that nothing is preventing the flow of air between connectors 1 and 2 (internal passage closed) | Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
| 4 | Pressure control solenoid valve signal checkConnect the Examiner in voltmeter mode: (using disconnector AD 233 N° 1806387000) insert the red probe in pin 2 of the solenoid valve and the black probe in pin 1Set the Examiner basic time at 2 seconds and 20 V f.s.Start the engineCheck for a square wave signal as illustrated in the graph | Restore the continuity of the wiring between the engine management control unit and the solenoid valveIf the signal is interrupted at the control unit output.Replace the engine control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |
