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STEP |
CHECK TO BE PERFORMED |
REMEDIAL ACTION IF THE CHECK IS NOT OK |
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1 |
Solenoid valve resistance check Disconnect the wiring from the solenoid. Check that the resistance between the two solenoid terminals 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. |
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2 |
Solenoid valve ducts check Connect the vacuum pump (Fig. 1) n.° 2000015500 to connector 3 of the supercharging pressure solenoid valve 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 3 and 2 |
Replace the turbopressure control solenoid valve Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R. |
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3 |
Solenoid valve operation check Connect the vacuum pump (Fig. 1) n.° 2000015500 to connector 1 of the supercharging pressure solenoid valve 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 Connect 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. |
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4 |
Pressure control solenoid valve signal check Connect 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 1 Set the Examiner basic time at 2 seconds and 20 V f.s. Start the engine Check 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 valve If the signal is interrupted at the control unit output. Replace the engine control unit |
FIG.1
Turbocharging pressure control solenoid operation signal