Engine Controls - System & Component Testing: Other Volvo S40 I рестайлинг

Preliminary Checks

1. Warm engine to normal operating temperature. Turn off engine. If turbine shaft does not stop rotating shortly after engine stops, remove intake hose from turbocharger compressor housing.
2. Verify that turbocharger compressor wheel rotates freely. Ensure turbocharger compressor wheel does not scrape against turbocharger compressor housing when wheel is pushed radially or axially.

Checking Boost Pressure Control Valve

See BOOST PRESSURE CONTROL VALVE in ON-VEHICLE ADJUSTMENTS - S40 & V40 article.

Checking Boost Pressure While Driving Vehicle

Scheme 14

1. Remove turbocharger control valve from air cleaner housing. See «BOOST PRESSURE CONTROL VALVE»(ref-160009-S12938828042004012100000) in REMOVAL, OVERHAUL & INSTALLATION - S40 & V40. Remove Red-marked hose from turbocharger control valve. If hose cannot be pulled away, cut it off the control valve.
2. Connect Manometer (999-5230) and extension hose to attachment point of Red-marked hose on turbocharger control valve using a "T" intersection. (Scheme 14)
3. Route hose and manometer inside vehicle and hang manometer vertically. Ensure that vehicle hood can be fully closed. CAUTION: DO NOT hold brake pedal for more than 5 seconds or severe brake system damage may result.
4. Drive vehicle in second gear at approximately 1,800 RPM. Press accelerator pedal to Wide Open Throttle (WOT) and run engine up to 5,500 RPM. When 5,500 RPM is reached press brake pedal to create load on engine. This will create maximum boost pressure. Hold brake pedal for approximately 5 seconds and observe manometer. Boost pressure should be 7.25-8.70 psi (50-60 kPa). If pressure is not as specified, adjust boost pressure control valve. See «BOOST PRESSURE CONTROL VALVE»(ref-160009-S12938828042004012100000) in ON-VEHICLE ADJUSTMENTS - S40 & V40 article. Repeat procedure after adjustment. If value is OK, go to next step. NOTE: DTC ECM-2D will be stored when turbocharger electrical connector is disconnected.
5. Disconnect electrical connector for turbocharger control valve. Repeat procedure in step 4. This measures basic boost pressure with the vehicle in "limp-home" mode. Boost pressure should be 2.90-4.35 psi (20-30 kPa). If pressure is not as specified, go to next step. If value is OK, remove pressure testing equipment and connect turbocharger control valve hose and connector.
6. Retrieve and diagnose DTCs. Check turbocharger piping for leaks. See «INTAKE SYSTEM LEAK TEST»(ref-160013-S12742203892004012100000). Check for blockage and unusual noises. See «PRELIMINARY CHECKS»(ref-160013-S28577230712004012100000). Check that engine mechanical condition is good. Check for proper fuel octane and emission system function. Repair as necessary and repeat procedure in step 4. Go to next step.
7. If boost pressure is correct, but there is still power dissipation, replace ECM with a known good unit. See «ENGINE CONTROL MODULE»(ref-159330-S23995889922003112600000) in REMOVAL & INSTALLATION - S40 & V40 article. Repeat procedure in step 4. If boost pressure is now OK, remove pressure testing equipment and connect turbocharger control valve hose and connector. Retrieve and diagnose DTCs. If value is not OK, go to next step.
8. Replace turbocharger. See «TURBOCHARGER»(ref-159330-S20971672032003112600000) in REMOVAL & INSTALLATION - S40 & V40 article.

Checking Turbocharger Control Valve

Valve can be activated using scan tool. Follow scan tool manufacturer's instructions. Valve will click when activated. Check hoses carefully and repair or replace any damaged hoses.

COMPUTERIZED ENGINE CONTROLS

ENGINE CONTROL MODULE (ECM)

Note. When measuring resistance and voltage at ECM, use Breakout Box (951-1428). Connect Adapter (951-1314). DO NOT measure resistance and voltage at ECM connector.

Connecting Breakout Box & Preliminary Check

1. Turn ignition off. Wait 2 minutes. No voltage should be present at system relay before removing ECM. If cooling fan runs on after ignition is turned off, wait until 2 minutes after fan stops. CAUTION: DO NOT touch ECM pins. Static electricity can damage ECM components.
2. Remove ECM. See «ENGINE CONTROL MODULE»(ref-159330-S23995889922003112600000) in REMOVAL, OVERHAUL & INSTALLATION - S40 & V40 article.
3. Pull wire harness with the control module connector over to the right of the center console to avoid interfering with pedals. Connector must be placed on the floor. Ensure that male and female terminals in ECM and connector are intact and secure.
4. Connect Adapter (951-1314) to ECM connector. Connect Breakout Box (951-1428) to adapter.
5. Ensure terminals in ECM and connector are secure and wiring to female terminals is secured to pins. To check power and ground circuits, see «PIN VOLTAGE CHARTS»(ref-159293) article.

SENSORS & SWITCHES

ENGINE COOLANT TEMPERATURE SENSOR

Disconnect Engine Coolant Temperature (ECT) sensor connector. Using an ohmmeter, measure resistance at ECM side of connector. See ENGINE COOLANT TEMPERATURE SENSOR in SENSOR OPERATING RANGE CHARTS - S40 & V40 article. If resistance is not as specified, replace sensor.

OIL PRESSURE SENSOR

Raise and support vehicle. Remove lower engine cover. Check oil pressure sensor wire and connectors for signs of damage. Check for an open circuit between sensor and indicator light. See INSTRUMENT CLUSTER wiring diagram in appropriate SYSTEM WIRING DIAGRAMS article. If wiring and connection is okay, replace sensor.

FUEL SYSTEMS

FUEL SYSTEM PRESSURE RELEASE

For fuel system pressure testing, see BASIC DIAGNOSTIC PROCEDURES - S40 & V40 article.

IGNITION SYSTEMS

S40 & V40 models are equipped with a waste spark ignition system. Two ignition coils and two high-tension wires are used.

Resistance

Resistance between component terminals is .5 ohms at 68°F (20°C).

Checking System At Cylinder Head

1. Remove oil filler cap. Remove engine cover. Disconnect ventilation hose from cylinder head and pull away from its mount. Clean hose. Lubricate outside of hose with petroleum jelly and insert upside down between cylinder head and mount. see scheme 9 Secure with a NEW clamp.
2. Disconnect crankcase ventilation hose at turbocharger and blow hose clean in direction of ventilation air flow. (Scheme 15) Reconnect hose.
3. Clean vacuum hose connection at intake manifold. Remove vacuum hose connection from intake. Disconnect vacuum hose from connection. Blow it clean using compressed air and if necessary it can be cleaned using a welding rod no thicker than.126 inches (3.2 mm). Ensure intake manifold is free of debris and contaminants.
4. Connect vacuum hoses. Use a NEW gasket to seal vacuum hose connection to manifold and tighten to 19 ft. lbs. (26 N.m). Install engine cover and oil filler cap.

Scheme 15

FUEL EVAPORATIVE (EVAP)

If circuit or a component is faulty, a DTC should set.