08 · Engine

Air intake/vacuum circuit check

EngineAir intake/vacuum circuit check

AIR INTAKE/VACUUM CIRCUIT CHECK

Check 1048OA

1.9 Multijet

	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
1	Check the vacuum supply system components/functions: in particular, check for leaks or blockages. Check the seal of the secondary air inlet/turborcharging system hoses. Also check for any obstructions or porosity. Check for leaks in the intercooler. Check that the pipe restriction bands in the air intake/inlet system are correctly fitted. Check the hoses and connected pipes to identify any obstructions, damage etc. Check that the debimeter is not contaminated. Check the exhaust gas turbocharger and exhaust system components/functions	If possible, renew the pipes. Otherwise replace the faulty components Op. 1048A VACUUM AIR CIRCUIT
2	Check that the air filter is not contaminated	Replace the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
3	Check that the air filter is correctly fitted	Refit correctly Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
4	Turn the ignition key OFF. Disconnect the vacuum hose from the vacuum pump Connect a pressure gauge between the vacuum pump and the hose (see following figure). Start the engine, adjust to idle speed and check that the reading on the pressure gauge is -0.7 and 1.0 bars	Replace the vacuum unit Op. 3330D30 VACUUM PUMP - R+R

	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
5	Turn the ignition key OFF. Reconnect the hose to the vacuum pump Disconnect the vacuum hose from the turbocharge actuator solenoid (see following figure). Connect the pressure gauge between the solenoid and the hose. Start the engine and adjust to idle speed. Select the following control unit at the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9). Carry out the following active diagnosis: Turbo regulator, ensuring that it is successful	Replace the solenoid valve Op. 1064B42 SOLENOID CONTROLLING TURBOCHARGER VANE POSITION ACTUATOR - R.R

CHECK TO BE PERFORMED

RESOLUTION IF THE CHECK IS NOT OK

Turn the ignition key OFF.

Reconnect the hose to the vacuum pump

Disconnect the vacuum hose from the turbocharge actuator solenoid (see following figure).

Connect the pressure gauge between the solenoid and the hose.

Start the engine and adjust to idle speed.

Select the following control unit at the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9).

Carry out the following active diagnosis: Turbo regulator, ensuring that it is successful

Replace the solenoid valve

	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
6	Turn the ignition key OFF. Reconnect the vacuum hose to the turbocharger actuator solenoid. Start the engine and adjust to idle speed. Select the following parameters in the parameter screen: EGR valve opening and measured Air Mass. Set conditions where the EGR valve is open and check that the intake air mass is between 20 and 40 kg/h	Check the exhaust gas recovery solenoid is operating correctly See Test 1080CB EGR SOLENOID OPERATION CHECK
7	Then return to idle speed. Set conditions where the EGR valve is closed and in these conditions check that the intake air mass is between 40 and 60 kg/h	Replace the debimeter Op. 1060G10 AIR FLOW METER - R.R.

CHECK TO BE PERFORMED

RESOLUTION IF THE CHECK IS NOT OK

Turn the ignition key OFF.

Reconnect the vacuum hose to the turbocharger actuator solenoid.

Start the engine and adjust to idle speed.

Select the following parameters in the parameter screen: EGR valve opening and measured Air Mass.

Set conditions where the EGR valve is open and check that the intake air mass is between 20 and 40 kg/h

Check the exhaust gas recovery solenoid is operating correctly

Then return to idle speed.

Set conditions where the EGR valve is closed and in these conditions check that the intake air mass is between 40 and 60 kg/h

Replace the debimeter

1.3 Multijet

STEP	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
1	Check the vacuum supply system components/functions: in particular, check for leaks or blockages. Check the seal of the secondary air inlet/turborcharging system hoses. Also check for any obstructions or porosity. Check that the pipe restriction bands in the air intake/inlet system are correctly fitted. Check the hoses and connected pipes to identify any obstructions, damage etc. Check that the debimeter is not contaminated. Check the exhaust gas turbocharger and exhaust system components/functions	If possible, renew the pipes. Otherwise replace the faulty components
2	Check that the air filter is not contaminated	Replace the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
3	Check that the air filter is correctly fitted	Refit correctly Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
4	Select the following control unit at the diagnostic equipment: Marelli 6F3 Diesel Injection EOBD CAN (EP engine 1.3 JTD) Check the value of the following parameters: - Measured air mass See Test 1060GG CHECK MEASURED AIR MASS - Measured turbo pressure See Test 1060GF SUPERCHARGING PRESSURE CHECK
5	Carry out the following active diagnosis: EGR valve control, ensuring that it is successful	Check that the EGR valve is working properly by carrying out the See Test 1080CB EGR SOLENOID OPERATION CHECK

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