Contents

			Test results
1	COMPONENT CONCERNED	CHECK ON CONNECTIONS AT TURBOCHARGING SENSOR AND AT POWERTRAIN CONTROL MODULE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Connections on supercharging sensor and Powertrain Control Module	Check for loose connections on the supercharging sensor and the Powertrain Control Module	Go to Step 2	Presence of loose connections	Restore the correct connections
2	COMPONENT CONCERNED	WIRING INSULATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Supercharging sensor wiring	Check that the wiring is correctly insulated	Go to Step 3	Wiring insulation not correct	Restore the correct insulation for the wiring
3	COMPONENT CONCERNED	WIRING CONTINUITY CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Supercharging sensor wiring	Check the correct continuity of the wiring	Go to Step 4	Incorrect wiring continuity	Restore the correct continuity for the wiring
4	COMPONENT CONCERNED	TURBOCHARGING AIR BY-PASS SOLENOID VALVE OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	By-pass solenoid valve	Check that the turbocharging air by-pass solenoid is working properly See Test 1064BH CHECK ON OPERATION OF SUPERCHARGING AIR BY-PASS SOLENOID VALVE (SHUT OFF)	Go to Step 5	Solenoid valve not working properly	Replace the by-pass solenoid Op. 1048B58 TURBOCHARGER AIR BY-PASS VALVE - R.R.
5	COMPONENT CONCERNED	AIR SEEPAGE CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Turbocharger – throttle body connection pipe	Check for the presence of air seepage in the pipe connecting the turbocharger to the throttle body.	End of diagnosis	Presence of air seepage	Restore the correct seal for the pipes