Engine Controls - System/component Tests - Turbo: Other Eagle Talon II

Turbocharger Wastegate Solenoid

1. Turbocharger wastegate solenoid is located at passenger's side of engine compartment, just below air cleaner and contains a 2-pin Black electrical connector with Red and Red/Yellow wires in the electrical connector. see scheme 1
2. Place identification tags on hoses for reassembly reference at turbocharger wastegate solenoid. Disconnect hoses and electrical connector from turbocharger wastegate solenoid.
3. Using vacuum pump, apply vacuum on fitting "A" on turbocharger wastegate solenoid. (Scheme 90) Turbocharger wastegate solenoid should maintain vacuum. If vacuum can be maintained, go to next step. If vacuum cannot be maintained, replace turbocharger wastegate solenoid.
4. Using jumper wires, apply battery voltage to electrical terminals on turbocharger wastegate solenoid while applying vacuum to fitting "A". (Scheme 90)
5. Turbocharger wastegate solenoid should not maintain vacuum with fitting "B" open, but should maintain vacuum with fitting "B" plugged. If turbocharger wastegate solenoid operation is correct, disconnect battery and go to next step. If turbocharger wastegate solenoid operation is not as specified, replace turbocharger wastegate solenoid.
6. Using ohmmeter, check resistance between electrical terminals on turbocharger wastegate solenoid. Resistance should be 36-44 ohms at 68°F (20°C). Replace turbocharger wastegate solenoid if resistance is not within specification.

Scheme 90

Turbocharger By-Pass Valve

1. Remove turbocharger by-pass valve from air inlet duct. Turbocharger by-pass valve is located on air inlet ducting between turbocharger and air cleaner assembly. (Scheme 91)
2. Apply air pressure to bottom of turbocharger by-pass valve. (Scheme 92) Air should not pass through turbocharger by-pass valve.
3. Using vacuum pump, apply 16 in. Hg vacuum to vacuum hose fitting on turbocharger by-pass valve while applying air pressure on bottom of turbocharger by-pass valve. (Scheme 91)
4. Turbocharger by-pass valve should start to open when vacuum is applied. Replace turbocharger by-pass valve if defective.

Scheme 91

Scheme 92

ENGINE CONTROL MODULE

For testing of engine control module and input voltages, see the J - PIN VOLTAGE article.

Barometric Pressure Sensor

Barometric pressure sensor is incorporated into the volume airflow sensor. Individual component testing is not available from manufacturer. If barometric pressure sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

Camshaft Position Sensor

Individual component testing is not available from manufacturer. If camshaft position sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

Crankshaft Position Sensor

Individual component testing is not available from manufacturer. If crankshaft position sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

Engine Coolant Temperature Sensor

1. Engine coolant temperature sensor is located in coolant housing on passenger's side front of engine, just below coolant filler cap. Engine coolant temperature sensor has a Black wire and a Black/White wire in the connector.
2. Drain cooling system. Remove engine coolant temperature sensor. Place sensing end of engine coolant temperature sensor in water.
3. Connect ohmmeter between electrical terminals on engine coolant temperature sensor. Heat water to specified temperature and ensure resistance is within specification. See «ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE»(ref-11337-S21488377702000111300000) table.
4. Replace engine coolant temperature sensor if resistance is not within specification. Apply thread sealant to threads on engine coolant temperature sensor. Install and tighten engine coolant temperature sensor to 22 ft. lbs. (30 N.m). Reinstall connector.

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE

Front Oxygen Sensor

1. Disconnect connector at front oxygen sensor. Front oxygen sensor is mounted on outlet elbow on turbocharger, near exhaust pipe.
2. Install Test Harness (MD998464) on the connector going to the front oxygen sensor. Using ohmmeter, check for continuity between terminals No. 1 (Red clip) and 3 (Blue clip) on test harness. Continuity should exist.
3. If continuity exists, remove ohmmeter and go to next step. If continuity does not exist, replace front oxygen sensor. CAUTION: When connecting jumper wires to test harness and battery, use care to ensure jumper wires are properly connected or front oxygen sensor may be damaged.
4. Start and warm engine until engine coolant temperature is at least 176°F (80°C). Using jumper wires, connect terminal No. 1 (Red clip) on test harness to positive battery terminal and terminal No. 3 (Blue clip) to negative battery terminal.
5. Connect digital voltmeter between terminals No. 2 (Black clip) and 4 (White clip) on test harness. Repeatedly accelerate engine and note front oxygen sensor output voltage.
6. Front oxygen sensor output voltage should be .6-1.0 volt. Shut engine off. Disconnect test equipment. If front oxygen sensor output voltage is within specification, front oxygen sensor is operating correctly. If front oxygen sensor output voltage is not within specification, replace front oxygen sensor.

Intake Air Temperature Sensor

1. Intake air temperature sensor is incorporated into the volume airflow sensor. Ensure ignition is off.
2. Disconnect connector for volume airflow sensor. Volume airflow sensor is located on passenger's side of engine compartment, near air cleaner.
3. Using ohmmeter, check resistance between terminals No. 5 and 6 on connector at volume airflow sensor. (Scheme 93)
4. Resistance should be within specification in relation to the temperature. See INTAKE AIR TEMPERATURE SENSOR RESISTANCE table.
5. Using hair drier, apply heat to intake air temperature sensor while monitoring resistance between terminals No. 5 and 6 on connector at volume airflow sensor. (Scheme 94)
6. Resistance should decrease as the temperature at intake air temperature sensor increases. If resistance is not within specification or resistance does not decrease with increased temperature, replace volume airflow sensor.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Scheme 93

Scheme 94

Knock Sensor

Individual component testing is not available. If knock sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

Manifold Differential Pressure Sensor

Individual component testing is not available from manufacturer. If manifold differential pressure sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

Rear Oxygen Sensor

1. Disconnect connector at rear oxygen sensor. Rear oxygen sensor is mounted on exhaust pipe, behind catalytic converter.
2. Using ohmmeter, check for continuity between terminals No. 3 and 4 on connector for rear oxygen sensor. (Scheme 95) Continuity should exist. Replace rear oxygen sensor if continuity does not exist.

Scheme 95

Throttle Position Sensor

1. Disconnect connector from throttle position sensor, located on side of throttle body. Using ohmmeter, check resistance between terminals No. 1 and 4 on connector for throttle position sensor. (Scheme 96) Resistance should be 3500-6500 ohms.
2. Using ohmmeter, check resistance between terminals No. 2 and 4 while moving throttle from idle position to full throttle. Resistance should change smoothly in proportion to throttle opening. If resistance is not within specification or resistance does not change smoothly, replace throttle position sensor.

Scheme 96

Vehicle Speed Sensor

1. Remove vehicle speed sensor from transaxle. (Scheme 97)
2. Connect a 3000-10,000 ohm resistor, voltmeter and battery to vehicle speed sensor. (Scheme 98)
3. Rotate shaft on vehicle speed sensor while monitoring voltage between terminals No. 2 and 3. Voltage should pulse 4 times with one revolution of the shaft. Replace vehicle speed sensor if defective.

Scheme 97

Scheme 98

Volume Airflow Sensor

Individual component testing is not available from manufacturer. If volume airflow sensor failure exists, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See the TESTS W/CODES - TURBO article.

A/C Switch

See A/C SWITCH under MISCELLANEOUS CONTROLS .

Closed Throttle Position Switch

1. Closed throttle position switch is incorporated into the throttle position sensor. Disconnect connector from throttle position sensor, located on side of throttle body.
2. Using ohmmeter, check for continuity between terminals No. 3 and 4 on connector for throttle position sensor with accelerator pedal in idle position. (Scheme 96)
3. If continuity exists, go to next step. If continuity does not exist, check adjustment of throttle position sensor. See the «ADJUSTMENTS - TURBO»(ref-11270) article. If correct adjustment cannot be obtained, replace throttle position sensor.
4. Depress and hold accelerator pedal fully downward. Using ohmmeter, check for no continuity between terminals No. 3 and 4 on connector for throttle position sensor.
5. If no continuity exists, closed throttle position switch is operating properly. If continuity exists, check adjustment of throttle position sensor. See the «ADJUSTMENTS - TURBO»(ref-11270) article. If correct adjustment cannot be obtained, replace throttle position sensor.

Park/Neutral Switch

1. Disconnect connector at park/neutral switch. Park/neutral switch is located on transaxle, just below the shift cable. Note park/neutral switch terminal identification. (Scheme 99)
2. Using ohmmeter, check that continuity exists between designated terminals in relation to shift lever position. See PARK/NEUTRAL SWITCH CONTINUITY table. If continuity is not as specified, check park/neutral switch adjustment. If adjustment is correct, replace park/neutral switch.

PARK/NEUTRAL SWITCH CONTINUITY

Scheme 99

Power Steering Pressure Switch

1. Disconnect pressure hose from power steering pump. Using Adapter No. 1 (MB991217) and Adapter No. 2 (MB990994), install Pressure Gauge (MB990662) between pressure hose and power steering pump. (Scheme 100)
2. Install thermometer in fluid reservoir so fluid temperature may be monitored. Start engine. Turn steering wheel several times until fluid temperature increases to approximately 122-140°F (50-60°C).
3. Disconnect connector from power steering pressure switch. Power steering pressure switch is located on top of power steering pump and contains a 1-pin connector.
4. Connect ohmmeter between ground and terminal on power steering pressure switch. Note continuity reading on ohmmeter.
5. With engine idling, gradually close shutoff valve to increase the pressure. Check the pressure when power steering pressure switch is actuated by watching for a change in the continuity. Power steering pressure switch should be actuated when pressure is 213-284 psi (14.9-19.9 k/cm 2 ).
6. Gradually open shutoff valve to decrease the pressure. Check the pressure when power steering pressure switch is de-actuated by watching for a change in the continuity. Power steering pressure switch should de-actuate when pressure is 114 psi (8.0 k/cm 2 ) or less.
7. Replace power steering pressure switch if operation is not as specified. Turn engine off. Remove test equipment. Reinstall pressure hose and bleed power steering system.

Scheme 100

Idle Air Control Motor

See IDLE CONTROL SYSTEM .

RELAYS

Note. A/C clutch relay may be referred to as A/C compressor clutch relay.

A/C Clutch Relay

1. Remove A/C clutch relay from underhood fuse/relay box, located near passenger's side strut tower. (Scheme 101)
2. Using ohmmeter, check that continuity exists between terminals No. 1 and 3 on A/C clutch relay. (Scheme 102)
3. Using ohmmeter, check that no continuity exists between terminals No. 4 and 5 on A/C clutch relay. Using jumper wire, apply battery voltage to terminals No. 1 and 3 on A/C clutch relay. (Scheme 102)
4. Using ohmmeter, check that continuity now exists between terminals No. 4 and 5 on A/C clutch relay. Replace A/C clutch relay if defective.

Scheme 101

Scheme 102

Fuel Pump Relay & MFI Relay

1. Remove relay. Fuel pump relay and MFI relay are located on passenger's side of center console, just in front of emergency brake lever. (Scheme 103) NOTE: Fuel pump relay contains a 4-pin connector with 2 Black/White wires, White/Red wire and a Black/Blue wire. MFI relay contains a 4-pin connector with 2 Red/Black wires, Red wire and a Blue/Green wire.
2. Using ohmmeter, check resistance between terminals No. 2 and 4 on relay. (Scheme 103) Resistance should be approximately 70 ohms.
3. Using ohmmeter, check that no continuity exists between terminals No. 1 and 3 on relay. Using jumper wire, connect positive battery terminal to terminal No. 4 on relay. Using jumper wire, connect negative battery terminal to terminal No. 2 on relay.
4. Using ohmmeter, check that continuity now exists between terminals No. 1 and 3 on relay. Replace relay if defective.

Scheme 103

EGR Solenoid

See EMISSION SYSTEMS & SUB-SYSTEMS .

EVAP Purge Solenoid

See EMISSION SYSTEMS & SUB-SYSTEMS .

Fuel Pressure Solenoid

See FUEL DELIVERY .

See TURBOCHARGER .

1. Fuel pressure solenoid is located on firewall at driver's side of engine compartment, near brake booster and contains a 2-pin Black connector with Red and Blue/Red wires in the connector. (Scheme 104)
2. Place identification tags on hoses for reassembly reference at fuel pressure solenoid. Disconnect hoses and electrical connector from fuel pressure solenoid.
3. Using vacuum pump, apply vacuum at fitting "A" on fuel pressure solenoid. (Scheme 105)
4. Fuel pressure solenoid should not maintain vacuum with fitting "B" open, but should maintain vacuum with fitting "B" plugged. If fuel pressure solenoid operation is as specified, go to next step. If fuel pressure solenoid operation is not as specified, replace fuel pressure solenoid.
5. Using jumper wires, apply battery voltage to electrical terminals on fuel pressure solenoid while applying vacuum to fitting "A". (Scheme 105)
6. Fuel pressure solenoid should maintain vacuum with fitting "B" open. If vacuum can be maintained, disconnect battery and go to next step. If vacuum cannot be maintained, replace fuel pressure solenoid.
7. Using ohmmeter, check resistance between electrical terminals on fuel pressure solenoid. Resistance should be 36-44 ohms at 68°F (20°C). Replace fuel pressure solenoid if resistance is not within specification.

Scheme 104

Scheme 105

Fuel Injector

1. To check fuel injector resistance, disconnect electrical connector from fuel injector. Using ohmmeter, measure resistance between electrical terminals on fuel injector.
2. Resistance should be 2-3 ohms at 68°F (20°C). If resistance is within specification, reinstall electrical connector and go to next step. If resistance is not within specification, replace fuel injector.
3. To check fuel injector operation, using stethoscope, listen for operating sound at fuel injector while cranking engine or with engine idling. If no operating sound is heard, check fuel injector driver circuit from Engine Control Module (ECM).

Fuel Injector Resistor

1. Ensure ignition is off. Disconnect connector at fuel injector resistor. Fuel injector resistor is located near throttle body and contains a 6-pin Black connector. (Scheme 106)
2. Using ohmmeter, check resistance between terminals No. 1 and 3, 3 and 4, 3 and 5, and 3 and 6 on connector for fuel injector resistor connector. (Scheme 107)
3. Resistance should be 5.5-6.5 ohms at 68°F (20°C). Replace fuel injector resistor if resistance is not within specification.

Scheme 106

Scheme 107

Scheme 108

1. To check idle air control motor resistance, ensure ignition is off. Disconnect connector at idle air control motor. Idle air control motor is mounted on throttle body and contains a 6-pin Black connector.
2. Install Test Harness (MD998463) on idle air control motor. Using ohmmeter, check resistance between terminals No. 1 (Red clip) and 2 (White clip) on test harness, and then between terminals No. 2 (White clip) and 3 (Blue clip) on test harness. Perform STEP 1. (Scheme 108) Resistance should be 28-33 ohms at 68°F (20°C).
3. Using ohmmeter, check resistance between terminals No. 4 (Black clip) and 5 (Green clip) on test harness, and then between terminals No. 5 (Green Clip) and 6 (Yellow clip) on test harness. Perform STEP 2. (Scheme 108) Resistance should be 28-33 ohms at 68°F (20°C).
4. If resistance is within specification, go to next step. If resistance is not within specification, replace idle air control motor.
5. To check idle air control motor operation, remove idle air control motor from throttle body. Install Test Harness (MD998463) on idle air control motor.
6. Connect positive terminal of a 6-volt battery to White and Green clips on test harness. (Scheme 109)
7. Connect negative terminal of 6-volt battery to specified clips on test harness in proper sequence. See IDLE AIR CONTROL MOTOR GROUNDING SEQUENCE table. (Scheme 109) IDLE AIR CONTROL MOTOR GROUNDING SEQUENCE Sequence Clips On Test Harness Step 1 Red & Black Step 2 Blue & Black Step 3 Blue & Yellow Step 4 Red & Yellow Step 5 Red & Black Step 6 (1) (1) Repeat step 5 back to step 1 in sequence.
8. When connecting negative terminal to specified clips on test harness, idle air control motor should operate. A slight vibration will exist at idle air control motor and the pintle on idle air control motor should move.
9. Replace idle air control motor if defective. Remove test harness. Reinstall idle air control motor.

Scheme 109

IGNITION SYSTEM

Note. For basic ignition checks, see BASIC TESTING - TURBO article.

1. The EGR solenoid is located on firewall, just below wiper arm. (Scheme 110)
2. Place identification tags on hoses for reassembly reference at EGR solenoid. Disconnect hoses and electrical connector from EGR solenoid.
3. Using vacuum pump, apply vacuum on fitting "A" on EGR solenoid. (Scheme 111) EGR solenoid should maintain vacuum. If vacuum can be maintained, go to next step. If vacuum cannot be maintained, replace EGR solenoid.
4. Using jumper wires, apply battery voltage to electrical terminals on EGR solenoid while applying vacuum to fitting "A". (Scheme 111)
5. EGR solenoid should not maintain vacuum with fitting "B" open, but should maintain vacuum with fitting "B" plugged. If EGR solenoid operation is correct, disconnect battery and go to next step. If EGR solenoid operation is not as specified, replace EGR solenoid.
6. Using ohmmeter, check resistance between electrical terminals on EGR solenoid. Resistance should be 36-44 ohms at 68°F (20°C). Replace EGR solenoid if resistance is not within specification.

Scheme 110

Scheme 111

EGR Valve

1. Remove EGR valve. Inspect EGR valve for carbon deposits etc. Clean EGR valve if carbon deposits exist.
2. Using vacuum pump, apply 1.6 in. Hg of vacuum at vacuum hose fitting on top of EGR valve. Apply air pressure on bottom passage on EGR valve. Air should not pass out top passage on EGR valve. If air does not pass out top passage, go to next step. If air passes out the top passage, replace EGR valve.
3. Increase vacuum on EGR valve to at least 7.9 in. Hg. Apply air pressure on bottom passage on EGR valve. Air should now pass out top passage on EGR valve. If air does not pass out top passage, replace EGR valve.

1. The EVAP purge solenoid is located on firewall, just below wiper arm. (Scheme 110)
2. Place identification tags on hoses for reassembly reference at EVAP purge solenoid. Disconnect hoses and electrical connector from EVAP purge solenoid.
3. Using vacuum pump, apply vacuum on fitting "A" on EVAP purge solenoid. (Scheme 112) EVAP purge solenoid should maintain vacuum. If vacuum can be maintained, go to next step. If vacuum cannot be maintained, replace EVAP purge solenoid.
4. Using jumper wires, apply battery voltage to electrical terminals on EVAP purge solenoid while applying vacuum to fitting "A". (Scheme 112)
5. EVAP purge solenoid should not maintain vacuum. If EVAP purge solenoid operation is correct, disconnect battery and go to next step. If EVAP purge solenoid operation is not as specified, replace EVAP purge solenoid.
6. Using ohmmeter, check resistance between electrical terminals on EVAP purge solenoid. Resistance should be 36-44 ohms at 68°F (20°C). Replace EVAP purge solenoid if resistance is not within specification.

Scheme 112

Purge Control Valve

1. Remove purge control valve. Purge control valve is located near EVAP canister. (Scheme 113)
2. Connect vacuum pump to vacuum port at bottom of purge control valve. (Scheme 114) Apply 16 in. Hg of vacuum on purge control valve. Ensure vacuum can be maintained. Release vacuum and go to next step.
3. Lightly apply air pressure on top of purge control valve at the side from EVAP canister. (Scheme 114)
4. With no vacuum applied, air should pass through purge control valve. Apply at least 8 in. Hg of vacuum on purge control valve. Air should now pass through purge control valve. Remove vacuum pump from vacuum port.
5. Connect vacuum pump to positive pressure port on purge control valve. (Scheme 114) Apply 16 in. Hg of vacuum to positive pressure port. Ensure vacuum can be maintained. Replace purge control valve if operation is not as specified.

Scheme 113

Scheme 114

Check Valve

Check valve is located between purge hose and EVAP canister. (Scheme 113) Testing information is not available.

Fuel Tank Pressure Relief Valve

1. Disconnect hoses from fuel tank pressure relief valve. (Scheme 113)
2. Apply light air pressure on fuel tank pressure relief valve at the inlet side from the fuel tank. (Scheme 114) Air should pass through relief valve with slight resistance.
3. Apply light air pressure on fuel tank pressure relief valve at the outlet side to EVAP canister. Air should pass through relief valve with no resistance. Replace fuel tank pressure relief valve if defective.

PCV System

1. Disconnect ventilation hose from PCV valve. PCV valve is located at rear corner of valve cover. Remove PCV valve from valve cover.
2. Reinstall ventilation hose on PCV valve. Start engine and allow engine to idle. Place finger over opening at valve cover end of PCV valve.
3. Intake manifold vacuum should exist and plunger in PCV valve should move when finger is placed over opening at end of PCV valve. If intake manifold vacuum does not exist, or plunger fails to move, clean PCV valve, check vacuum supply and recheck operation. If vacuum exists, but proper operation cannot be obtained, replace PCV valve.

PCV Valve

1. Disconnect ventilation hose from PCV valve. PCV valve is located at rear corner of valve cover. Remove PCV valve from valve cover.
2. Insert small rod into valve cover end of PCV valve. Move small rod back and forth to verify plunger in PCV valve is free to move. If plunger will not move, clean or replace PCV valve as necessary.

MISCELLANEOUS CONTROLS

Note. Although some of the controlled devices listed here are not technically engine performance components, they can affect driveability if they malfunction.

See RELAYS under MOTORS, RELAYS & SOLENOIDS.

1. Remove A/C switch from instrument panel. Note terminal identification on A/C switch. (Scheme 115)
2. Using ohmmeter, check that continuity exists between the specified A/C switch terminals in relation to A/C switch position. See A/C SWITCH CONTINUITY table. Replace A/C switch if continuity is not as specified.

A/C SWITCH CONTINUITY

Scheme 115