Engine Controls - System/component Tests - 2.2L: Other Toyota Camry V40

Power & Ground Circuits

For testing of Engine Control Module (ECM) power and ground circuits, see PIN VOLTAGE CHART S article. See ECM LOCATION table for identifying ECM mounting locations.

ECM LOCATION

CAMSHAFT POSITION SENSOR

Camshaft position sensor is a pick-up coil located in the distributor. For checking of pick-up coil, see PICK-UP COIL RESISTANCE and PICK-UP COIL AIR GAP under IGNITION CHECKS (DISTRIBUTOR TYPE IGNITION SYSTEM) in BASIC TESTING - 2.2L article.

CRANKSHAFT POSITION SENSOR

For testing crankshaft position sensor, see CRANKSHAFT POSITION SENSOR under IGNITION CHECKS (DISTRIBUTOR TYPE IGNITION SYSTEM) in BASIC TESTING - 2.2L article.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

1. Ensure ignition is off. Disconnect electrical connector from ECT sensor. See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION»(ref-21981-S26102582612001010300000) table. To verify wire colors for proper sensor identification, see appropriate wiring diagram in WIRING DIAGRAMS article. NOTE: The ECT sensor may be also identified using appropriate illustration in «THEORY/OPERATION - 2.2L»(ref-21903) article.
2. Using ohmmeter, check resistance between electrical terminals on ECT sensor. Resistance should be within specification at designated temperature. (Scheme 36) Replace ECT sensor if resistance is not within specification.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION

Scheme 36

HEATED OXYGEN SENSOR

See OXYGEN SENSOR under ENGINE SENSORS & SWITCHES.

INTAKE AIR TEMPERATURE SENSOR

1. Ensure ignition is off. Disconnect electrical connector from intake air temperature sensor. Intake air temperature sensor is located in air intake, near air filter. NOTE: Intake air temperature sensor may be also identified using appropriate illustration in «THEORY/OPERATION - 2.2L»(ref-21903) article.
2. Remove intake air temperature sensor. Place threaded end of intake air temperature sensor and thermometer in container of water. Attach ohmmeter between electrical terminals on intake air temperature sensor.
3. Heat water and note that resistance is within specification in relation to temperature. (Scheme 36) Replace intake air temperature sensor if resistance is not within specification.

KNOCK SENSOR

Note. Knock sensor may also be referred to as knock sensor No. 1.

1. Knock sensor is located on the cylinder block. (Scheme 37) Remove knock sensor from cylinder block before testing. See REMOVE/INSTALL/OVERHAUL article.
2. Using ohmmeter, check that no continuity exists between electrical terminal of knock sensor and body of knock sensor. Replace knock sensor if continuity exists.

Scheme 37

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

1. Ensure ignition is off. To check MAP sensor supply voltage, disconnect electrical connector from MAP sensor. See «MAP SENSOR LOCATION»(ref-21981-S18760075232001010300000) table. NOTE: MAP sensor may also be identified using appropriate illustration in «THEORY/OPERATION - 2.2L»(ref-21903) article. The MAP sensor has a vacuum hose connected to it and may be identified by wire colors. See appropriate wiring diagram in WIRING DIAGRAMS article. MAP SENSOR LOCATION Application Location Camry In Engine Compartment, On Center Of Firewall
2. Turn ignition on. Using voltmeter, check MAP sensor supply voltage between terminals VC or VCC on wiring harness side of electrical connector for MAP sensor. (Scheme 38) The VC or VCC and E2 terminals are the 2 outer terminals on all models. DO NOT use the center terminal.
3. The MAP sensor supply voltage should be 4.5-5.5 volts. If MAP sensor supply voltage is not within specification, check wiring circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. If MAP sensor supply voltage is within specification, turn ignition off. Reinstall electrical connector on MAP sensor.
4. To check MAP sensor output voltage, turn ignition on. Disconnect vacuum hose for MAP sensor from intake manifold. Connect voltmeter between terminals PIM and E2 on Engine Control Module (ECM). (Scheme 39) See «ECM LOCATION»(ref-21981-S33864934842001010300000) table. See TERMINAL & WIRE COLOR IDENTIFICATION table. ECM LOCATION Model Location Camry Behind Glove Box TERMINAL & WIRE COLOR IDENTIFICATION Application & Terminal Wire Color PIM Black/Yellow E2 Brown
5. Measure and record output voltage under ambient atmospheric pressure. Attach vacuum pump to MAP sensor.
6. Apply vacuum in specified increments and measure MAP sensor output voltage drop at each increment. See «MAP SENSOR OUTPUT VOLTAGE DROP SPECIFICATIONS»(ref-21981-S23921451362001010300000) table. Replace MAP sensor if output voltage drop is not within specification.

MAP SENSOR OUTPUT VOLTAGE DROP SPECIFICATIONS

Scheme 38

Scheme 39

OXYGEN SENSOR

1. Two oxygen sensors are used. One oxygen sensor is on exhaust manifold before catalytic converter and another oxygen sensor is on bottom of front catalytic converter.
2. If problem exists with oxygen sensor, a diagnostic trouble code will be stored in Engine Control Module (ECM). For diagnostic trouble code diagnosis, see «TESTS W/CODES - 2.2L»(ref-21941) article.

A/T Models

If problem exists with Park/Neutral Position (PNP) switch or circuit, a diagnostic trouble Code P1780 will be stored in the Engine Control Module (ECM). For diagnostic trouble code diagnosis, see TESTS W/CODES - 2.2L article.

1. Disconnect electrical connector from Park/Neutral Position (PNP) switch, mounted on side of transmission/transaxle. Note terminal identification. (Scheme 40)
2. Using ohmmeter, check for continuity between specified terminals with shift lever in proper positions. See «PARK/NEUTRAL POSITION SWITCH SPECIFICATIONS»(ref-21981-S39585074462001010300000) table. If proper continuity cannot obtained, adjust or replace switch as necessary.

PARK/NEUTRAL POSITION SWITCH SPECIFICATIONS

Scheme 40

PICK-UP COILS

See PICK-UP COIL AIR GAP and PICK-UP COIL RESISTANCE under IGNITION CHECKS (DISTRIBUTOR TYPE IGNITION SYSTEM) in the BASIC TESTING - 2.2L article.

THROTTLE POSITION (TP) SENSOR

1. Ensure ignition is off. Disconnect electrical connector from throttle position sensor on throttle body. Note terminal identification. (Scheme 41) NOTE: Some models require that vacuum be applied to throttle opener before checking throttle position sensor. See appropriate THROTTLE POSITION SENSOR RESISTANCE SPECIFICATIONS table.
2. Insert specified thickness feeler gauge between throttle stop screw and throttle lever and check resistance or continuity. See appropriate «THROTTLE POSITION SENSOR RESISTANCE SPECIFICATIONS»(ref-21981-S19827293812001010300000) table. Replace or adjust throttle position sensor if not within specification.

Scheme 41

THROTTLE POSITION SENSOR RESISTANCE SPECIFICATIONS

VEHICLE SPEED SENSOR

1. Vehicle speed sensor is located on transmission/transaxle and contains a 3-pin electrical connector. Connect voltmeter and battery voltage and ground on electrical terminals of vehicle speed sensor. (Scheme 42)
2. While rotating vehicle speed sensor shaft, ensure voltage changes from zero to at least 11 volts. Voltage should change 4 times per revolution of the shaft. Replace vehicle speed sensor if voltage does not change as specified. Remove test equipment.

Scheme 42

CIRCUIT OPENING RELAY

1. Ensure ignition is off. Remove circuit opening relay. See «CIRCUIT OPENING RELAY LOCATION»(ref-21981-S20605685182001010300000) table. NOTE: Circuit opening relay may also be identified using appropriate illustration in «THEORY/OPERATION - 2.2L»(ref-21903) article and wire color. See appropriate wiring diagram in WIRING DIAGRAMS article. CIRCUIT OPENING RELAY LOCATIONS Application Relay Location Camry In Relay Box Located Behind Glove Box
2. To test circuit opening relay continuity, using ohmmeter, check continuity between specified terminals. (Scheme 43)-9.
3. To test circuit opening relay operation, apply battery voltage and ground to relay and use ohmmeter to check continuity between specified terminals. (Scheme 43)-9. Replace circuit opening relay if defective.

Scheme 43

Scheme 44

EFI MAIN RELAY

Note. EFI main relay may also be referred to as EFI relay.

1. Ensure ignition is off. Remove EFI main relay. See «EFI MAIN RELAY LOCATION»(ref-21981-S14350069232001010300000) table. NOTE: The EFI main relay may also be identified using appropriate illustration in «THEORY/OPERATION - 2.2L»(ref-21903) article. EFI MAIN RELAY LOCATION Application Location Camry In Large Fuse/Relay Box Near Driver's Side Front Corner Of Engine Compartment
2. To test EFI main relay continuity, using ohmmeter, check continuity between specified terminals. (Scheme 45)-11.
3. To test EFI main relay operation, apply battery voltage and ground to relay and use ohmmeter to check continuity between specified terminals. (Scheme 45)-11. Replace EFI main relay if defective.

Scheme 45

Scheme 46

See CIRCUIT OPENING RELAY under RELAYS.

See EFI MAIN RELAY under RELAYS.

Fuel Pump Pressure

For fuel pump pressure testing, see BASIC TESTING - 2.2L article.

Fuel Injectors

1. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, check resistance between electrical terminals on fuel injector. Replace fuel injector if resistance is not within specification. See «FUEL INJECTOR RESISTANCE SPECIFICATIONS»(ref-21981-S40122926132001010300000) table.
2. To check fuel injector spray pattern and volume, remove fuel injector. See REMOVE/INSTALL/OVERHAUL article. Disconnect fuel hose from fuel filter outlet. Use Delivery Hose (09268-41046) to install fuel injector between fuel filter and pressure regulator. (Scheme 47)
3. Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage.
4. Use scan tester to operate the fuel pump or apply battery voltage to electric fuel pump to pressurize the fuel system. See FUEL PRESSURE in «BASIC TESTING - 2.2L»(ref-21921) article.
5. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 48) Measure fuel injector volume and check spray pattern. Test each fuel injector 2-3 times. Replace fuel injector if fuel injector volume is not within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-21981-S08287129202001010300000) table. NOTE: Ensure difference between fuel injector volume on all fuel injectors is within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS table.
6. Disconnect fuel injector tester. Ensure fuel leakage from end of fuel injector is one drop or less in specified time. See «FUEL INJECTOR LEAKAGE SPECIFICATIONS»(ref-21981-S28457907052001010300000) table. Replace fuel injector if leakage exceeds specified amount.

FUEL INJECTOR RESISTANCE SPECIFICATIONS

FUEL INJECTOR VOLUME SPECIFICATIONS

FUEL INJECTOR LEAKAGE SPECIFICATIONS

Scheme 47

Scheme 48

Fuel Cut System

1. When testing fuel cut system, engine RPM must be monitored using scan tester. Connect scan tester to data link connector No. 3 for monitoring engine RPM. For connecting of scan tester, see application under IDLE SPEED & MIXTURE in «ADJUSTMENTS - 2.2L»(ref-21885) article.
2. Start and warm engine to normal operating temperature. Ensure the A/C and all accessories are off. Gradually increase engine RPM to maintain at least specified engine speed. See «FUEL CUT SYSTEM TESTING SPECIFICATIONS»(ref-21981-S10899527872001010300000) table. FUEL CUT SYSTEM TESTING SPECIFICATIONS Application Engine RPM Camry 2500
3. Using stethoscope, check for fuel injector operating sound. Ensure when throttle lever is released, fuel injector stops operating momentarily and then resumes operating (fuel return RPM).
4. Ensure fuel return RPM is within specification. See «FUEL CUT SPECIFICATIONS»(ref-21981-S38190353222001010300000) table. Shut engine off. Remove test equipment.

FUEL CUT SPECIFICATIONS (1)

IDLE AIR CONTROL (IAC) VALVE

1. Warm engine to normal operating temperature. Ensure idle speed is within specification. See IDLE SPEED & MIXTURE in the «ADJUSTMENTS - 2.2L»(ref-21885) article.
2. Apply parking brake and place transmission/transaxle in Neutral. Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 of data link connector No. 1. (Scheme 49) Start engine and note RPM. NOTE: Data link connector No. 1 is located in engine compartment.
3. Engine RPM should increase to specified RPM for 5 seconds, and then return to idle. See «IAC VALVE ENGINE SPEED TESTING SPECIFICATIONS»(ref-21981-S40676165252001010300000) table. IAC VALVE ENGINE SPEED TESTING SPECIFICATIONS Application Engine RPM Camry 900-1300
4. If engine RPM is not as specified, test IAC valve resistance and operation. If engine RPM is within specification, remove jumper wire. Turn ignition off.
5. To test IAC valve resistance, ensure ignition is off. Disconnect electrical connector from IAC valve, located on lower area of throttle body. Using ohmmeter, check resistance between terminal +B and each remaining terminal. (Scheme 50)
6. Replace IAC valve if resistance is not within specification. See «IAC VALVE RESISTANCE SPECIFICATIONS»(ref-21981-S16662629092001010300000) table. IAC VALVE RESISTANCE SPECIFICATIONS Application Ohms Cold (1) 17.0-24.5 Hot (2) 21.5-28.5 (1) Cold is with temperature of 14-122°F (-10 - 50°C). (2) Hot is with temperature of 122-212°F (50-100°C).
7. To test IAC valve operation, remove IAC valve from throttle body. Apply battery voltage to +B terminal on IAC valve. Apply battery ground to proper terminal and ensure valve opens and closes. (Scheme 51) Replace IAC valve if defective.
8. If IAC valve resistance is within specification and operates correctly, check wiring circuit between Engine Control Module (ECM) and IAC valve. See «ECM LOCATION»(ref-21981-S33864934842001010300000) table. See appropriate wiring diagram in WIRING DIAGRAMS article.

ECM LOCATION

Scheme 49

Scheme 50

Scheme 51

IGNITION SYSTEM

Note. For basic ignition checks, see BASIC TESTING - 2.2L article.

See KNOCK SENSOR under ENGINE SENSORS & SWITCHES.

EGR GAS TEMPERATURE SENSOR

See EGR GAS TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES.

EGR VACUUM MODULATOR

Note. When testing EGR vacuum modulator, it may be necessary to monitor engine RPM by using scan tester. For scan tester connections, see IDLE SPEED & MIXTURE in the ADJUSTMENTS - 2.2L article.

1. Mark vacuum hose locations and disconnect vacuum hoses from EGR vacuum modulator. see scheme 19and see scheme 20. Block ports "P" and "R" on EGR vacuum modulator. see scheme 18 NOTE: Ports "P" and "R" are the double ports on side of EGR vacuum modulator. Port "Q" is single port on side of EGR vacuum modulator.
2. Apply air pressure to port "Q". see scheme 18 Air should flow freely through air filter side of EGR vacuum modulator.
3. Start and operate engine at specified RPM. See «EGR VACUUM MODULATOR TESTING SPECIFICATIONS»(ref-21981-S09595226772001010300000) table. Repeat test procedures in steps 1) and 2). Strong resistance of airflow should be felt. Replace EGR vacuum modulator if strong resistance is not felt. Reconnect vacuum hoses to proper locations.

EGR VACUUM MODULATOR TESTING SPECIFICATIONS

EGR VACUUM SWITCHING VALVE (VSV)

Note. When testing EGR VSV, use proper illustration to determine component location. see scheme 19and see scheme 20.

1. Disconnect electrical connector from EGR VSV. Using ohmmeter, check that continuity exists between electrical terminals on EGR VSV and that resistance is within specification. See «EGR VSV RESISTANCE SPECIFICATIONS»(ref-21981-S41377810232001010300000) table. Replace EGR VSV if no continuity exists or resistance is not within specification.
2. Ensure no continuity exists between each electrical terminal and the body of EGR VSV. Replace EGR VSV if continuity exists between electrical terminal and the body of EGR VSV.
3. Apply air pressure to port "E" without battery connected. (Scheme 52) Air pressure should flow from port "G" at end of EGR VSV. Apply battery voltage and ground to electrical terminals on EGR VSV. (Scheme 52) Apply air pressure to port "E". Air pressure should now flow through the air filter. Replace EGR VSV if defective.

EGR VSV RESISTANCE SPECIFICATIONS

Scheme 52

FUEL EVAPORATION SYSTEM

Note. Fuel evaporation systems contain different components depending on application. see scheme 19and see scheme 20. When testing fuel evaporation system components, use illustration to determine component location.

EVAP Thermal Vacuum Valve (M/T)

1. Drain cooling system. Remove EVAP TVV located in coolant passage. see scheme 19
2. Use cool water to cool threaded end of EVAP TVV to less than 95°F (35°C). Apply air pressure to top vacuum hose port on EVAP TVV. Ensure EVAP TVV is closed and air does not flow from lower vacuum hose port on EVAP TVV.
3. Heat water to greater than 129°F (54°C). Apply air pressure to top vacuum hose port on EVAP TVV. Ensure EVAP TVV is open and air flows from lower vacuum hose port on EVAP TVV. Replace EVAP TVV if defective. Apply thread sealant on threads of EVAP TVV and reinstall.

Charcoal Canister (A/T)

1. Remove charcoal canister. Install plug on port "E" at top of charcoal canister. (Scheme 53)and (Scheme 54).
2. Check for clogged filter and/or stuck check valve and diaphragm by applying light air pressure to port "A" while holding port "B" closed. (Scheme 53)and (Scheme 54). Ensure air flows freely from port "D".
3. Apply light air pressure to port "A" while holding ports "B" and "D" closed. (Scheme 53)and (Scheme 54). Ensure no air flows from port "C".
4. Using vacuum pump, apply light vacuum to port "B". Ensure vacuum does not decrease when port "C" is closed, and that vacuum decreases when port "C" is opened.
5. While holding port "C" closed, use vacuum pump to apply light vacuum to port "A". Ensure air flows into port "B". Replace charcoal canister if defective.

Charcoal Canister (M/T)

1. Remove charcoal canister. Check for clogged filter and/or stuck check valve by applying light air pressure to port "A". (Scheme 53)and (Scheme 54). Ensure air flows freely from other ports on charcoal canister.
2. Apply light air pressure to port "B". (Scheme 53)and (Scheme 54). Ensure air does not flow from any other ports on charcoal canister. Replace charcoal canister if defective.
3. To clean charcoal canister filter, apply 43 psi (3 kg/cm 2 ) air pressure to port "A" while holding port "B" closed. Air should flow from remaining ports on charcoal canister. Ensure no activated carbon comes out of charcoal canister. DO NOT attempt to wash out charcoal canister.

Scheme 53

Scheme 54

EVAP Check Valve (M/T)

1. Remove EVAP check valve from lower hose on charcoal canister. see scheme 19and see scheme 20. Apply air pressure to Yellow-colored side of EVAP check valve. Air should flow through EVAP check valve.
2. Apply air pressure to Black-colored side of EVAP check valve. Air should not flow through EVAP check valve. Replace EVAP check valve if defective.

EVAP Vacuum Switching Valve (A/T)

1. Remove EVAP Vacuum Switching Valve (VSV). See «EVAP VSV LOCATIONS»(ref-21981-S10985745672001010300000) table. see scheme 19and see scheme 20. EVAP VSV LOCATIONS Application Location Camry With A/T On Bracket Near Air Filter & Driver's Side Strut Tower NOTE: EVAP VSV may also be identified by wire colors. See appropriate wiring diagram in WIRING DIAGRAMS article.
2. Using ohmmeter, ensure continuity exists between electrical terminals on EVAP VSV and resistance is 30-34 ohms at 68°F (20°C). Ensure no continuity exists between each electrical terminal and the body of the EVAP VSV. Replace EVAP VSV if continuity exists between electrical terminal and body of EVAP VSV.
3. Apply air pressure to port "E". Ensure air does not flow from port "F". Perform STEP 1. (Scheme 55)and (Scheme 56).
4. Apply battery voltage and ground to electrical terminals on EVAP VSV. Apply air pressure to port "E". Ensure air flows from port "F". Perform STEP 2. (Scheme 55)and (Scheme 56). Replace EVAP VSV if defective.

Scheme 55

Scheme 56

Vapor Pressure Sensor (A/T)

1. Ensure ignition is off. To test vapor pressure sensor supply voltage, disconnect electrical connector from vapor pressure sensor. see scheme 19and see scheme 20. See «VAPOR PRESSURE SENSOR LOCATION»(ref-21981-S28453468962001010300000) table. VAPOR PRESSURE SENSOR LOCATION Application Location Camry With A/T On Firewall, Near Passenger's Side Of Brake Booster & Contains Gray 3-Pin Electrical Connector
2. Turn ignition on. Using voltmeter, measure voltage between terminals VC and E2 on wiring harness side of electrical connector for vapor pressure sensor. The VC and E2 terminals are the 2 outer terminals. DO NOT use the center terminal. Supply voltage should be 4.5-5.5 volts.
3. If supply voltage is not within specification, check wiring circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. If supply voltage is within specification, turn ignition off. Reinstall electrical connector on vapor pressure sensor.
4. To test vapor pressure sensor output voltage, turn ignition on. Disconnect vacuum hose from vapor pressure sensor. Connect voltmeter between specified terminals on Engine Control Module (ECM). (Scheme 57) See «ECM LOCATION»(ref-21981-S33864934842001010300000) and ECM TERMINAL APPLICATION tables. ECM LOCATION Model Location Camry With A/T Behind Glove Box ECM TERMINAL APPLICATION Application & Terminal No. Wire Color Automatic Transmission 7 Blue/Yellow 9 Brown
5. Using vacuum pump, apply.59 in. Hg of vacuum to vapor pressure sensor. Ensure output voltage is within specification. See «VAPOR SENSOR OUTPUT VOLTAGE»(ref-21981-S40677690042001010300000) table.
6. Release vacuum from vapor pressure sensor. Ensure output voltage is within specification. See «VAPOR SENSOR OUTPUT VOLTAGE»(ref-21981-S40677690042001010300000) table.
7. Apply.22 psi (.015 kg/cm 2 ) to vapor pressure sensor. Ensure output voltage is within specification. See «VAPOR SENSOR OUTPUT VOLTAGE»(ref-21981-S40677690042001010300000) table. Replace vapor sensor if output voltage is not within specification. Reconnect vacuum hose.

VAPOR SENSOR OUTPUT VOLTAGE

Scheme 57

Vapor Pressure Sensor Vacuum Switching Valve (A/T)

1. Remove vapor pressure sensor Vacuum Switching Valve (VSV), located on charcoal canister. see scheme 19and see scheme 20.
2. Using ohmmeter, ensure continuity exists between electrical terminals on vapor pressure sensor VSV and resistance is within specification. See «VAPOR PRESSURE SENSOR VSV RESISTANCE»(ref-21981-S24054420082001010300000) table. Replace vapor pressure sensor VSV if no continuity exists or resistance is not within specification. VAPOR PRESSURE SENSOR VSV RESISTANCE Application Ohms @ 68°F (20°C) Camry With A/T 33-39
3. Ensure no continuity exists between each electrical terminal and the body of vapor pressure sensor VSV. Replace vapor pressure sensor if continuity exists between electrical terminal and body of vapor pressure sensor VSV.
4. Apply air pressure to port "E". Ensure air flows from port "G" and air does not flow from port "F". Perform STEP 1. (Scheme 58)and (Scheme 59).
5. Apply battery voltage and ground to electrical terminals on vapor pressure sensor VSV. Apply air pressure to port "E". Ensure air flows from port "F" and air does not flow from port "G". Perform STEP 2. (Scheme 58)and (Scheme 59). Replace vapor pressure sensor VSV if defective.

Scheme 58

Scheme 59

POSITIVE CRANKCASE VENTILATION (PCV)

1. Remove PCV valve. Apply air pressure to PCV valve at cylinder head side of PCV valve. Ensure air flows easily through PCV valve.
2. Apply air pressure to PCV valve at intake manifold side of PCV valve. Ensure air flows through PCV valve with some resistance. Replace PCV valve if valve does not function as described.

THROTTLE OPENER

1. Warm engine to normal operating temperature. Ensure idle speed is within specification. See IDLE SPEED & MIXTURE in the «ADJUSTMENTS - 2.2L»(ref-21885) article.
2. Disconnect and plug vacuum hose at throttle opener, located on side of throttle body. Start engine. Maintain engine speed at 2500 RPM. Release throttle and note engine speed. Engine speed should be within specification. See «THROTTLE OPENER SPECIFICATIONS»(ref-21981-S06642032242001010300000) table.
3. If engine speed is not within specification, rotate throttle opener adjusting screw until correct engine speed is obtained. (Scheme 60) Reinstall vacuum hose on throttle opener.

Scheme 60

THROTTLE OPENER SPECIFICATIONS (1)