		Test results
1	TURBOCOMPRESSOR UNIT LUBRICATION CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check that there are no leaks from the turbine lubrication circuit and that the oil pipes are not damaged.	Move on to Step 2	Leaks in the turbine lubrication circuit.	Restore the correct seal for the lubrication circuit.
		Move on to Step 2	Oil pipes damaged.	Replace the oil pipes.
2	TURBOCOMPRESSOR UNIT COOLING CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check that there are no leaks from the turbine cooling circuit and that the water pipes are not damaged.	Move on to Step 3	Leaks in the turbine cooling circuit.	Restore the correct seal for the cooling circuit.
		Move on to Step 3	Water pipes damaged.	Replace the coolant pipes.
3	AIR PRESSURE CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check that the seal for the pressurized air circuit hoses in the circuit and the intercooler is correct. Check that there is no damage/lacerations to the air pressure circuit pipes.	Move on to Step 4	Hose seal is incorrect	Restore the correct seal.
		Move on to Step 4	Damage/lacerations to the pipes.	Replace damaged/lacerated elements
4	TURBOCHARGING PRESSURE CONTROL SOLENOID (PIERBURG) PIPES CHECK	All OK	Problems encountered	Operation
	Check that the supercharging solenoid valve pipes are correctly positioned and the seal is correct by carrying out the See Test 1064BB SUPERCHARGING PRESSURE SOLENOID (PIERBURG) VALVE OPERATION CHECK	Move on to Step 5	Pipes not correctly positioned on solenoid valve	Restore the pipes to the correct position.
		Move on to Step 5	Pipe seal incorrect/lacerated/damaged.	Restore the correct seal/replace damaged pipes.
5	TURBOCHARGING PRESSURE CHECK	All OK	Problems encountered	Operation
	Check the turbocharging pressure is correct, by following the See Test 1064BI FUEL SYSTEM RETURN PRESSURE CHECK	Move on to Step 6	Turbocharging pressure correct.	Replace the turbocharging pressure sensor Op. 1056B44 AIR PRESSURE SENSOR - R + R
6	WASTE GATE VALVE OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the waste gate valve is working properly See Test 1064BG CHECK ON CORRECT WASTE GATE VALVE ACTUATOR TRAVEL	End of diagnosis	Waste gate valve not working properly.	Replace the turbocharger unit Op. 1064A27 PIPE BETWEEN VACUUM RESERVOIR AND ACTUATOR CONTROL SOLENOID VALVE - R.R.

The customer reports a noise that increases in frequency as the engine speed increases.