OUTLINE - COMPONENT DESCRIPTIONS

F2-12spec table

Neutral/clutch switch for MTX; transaxle range switch for ATX.

Component Descriptions (continued)

Component	Function	Remarks
Engine control module (ECM)	Detects following: 1. A/C operation; 2. Air/fuel ratio (oxygen concentration); 3. Atmospheric pressure; 4. Braking signal; 5. Cranking signal; 6. E/L operation; 7. Engine coolant temperature; 8. Engine speed; 9. Ignition ON signal; 10. In-gear condition; 11. Intake air amount; 12. Intake air temperature; 13. EGR valve position; 14. No.1 piston TDC; 15. P/S operation; 16. Test mode signal (ignition timing, idle speed, diagnostic trouble code No.); 17. Throttle valve opening angle; 18. Closed throttle position; 19. Vehicle speed; 20. Knocking	1. A/C switch; 2. Heated oxygen sensor; 3. Barometric pressure sensor; 4. Brake switch; 5. Ignition switch (START position); 6. Blower motor switch, coolant fan relay, headlight switch, and rear window defroster switch; 7. Engine coolant temperature sensor; 8. Crankshaft position sensor (NE signal); 9. Ignition switch; 10. Neutral / clutch switch (MTX) Transaxle range switch (ATX); 11. Volume air flow sensor; 12. Intake air temperature sensor (in volume air flow sensor); 13. EGR valve position sensor; 14. Camshaft position sensor (SGC signal); 15. P/S pressure switch; 16. Data link connector (TEN terminal); 17. Throttle position sensor; 18. Closed throttle position switch (in throttle position sensor); 19. Vehicle speed sensor; 20. Knock sensor
Engine coolant temperature sensor	Detects engine coolant temperature; sends signal to ECM	Installed on engine
Fuel filter	Filters particles from fuel	-
Fuel injector	Injects fuel into intake port	Controlled by signals from ECM (side-feed type)
Fuel pump	Provides fuel to fuel injectors	Operates while engine running; Installed in fuel tank
Fuel pump relay	Voltage for fuel pump while engine running	-
Heated oxygen sensor	Detects oxygen concentration; sends signal to ECM	Zirconium and platinum coating; With heater
Idle air control valve	Supplies bypass air into intake manifold	Controlled by duty signal from ECM; Installed in BAC valve
Ignition control module	Receives spark signal from ECM and generates high voltage in ignition coil	Installed in distributor
Ignition switch (START position)	Sends engine cranking signal to ECM	-
Intake air temperature sensor	Detects intake air temperature; sends signal to ECM	Installed in volume air flow sensor
Intake manifold	Supplies intake air to all cylinders
Knock sensor	Detects knocking; sends signal to ECM	-
Main relay	Supplies current to output devices and ECM
Neutral/clutch switch (MTX)	Detects in-gear condition; sends signal to ECM	Switch ON in Neutral
One-way check valve	Prevents misoperation of VRIS shutter valve No.1 and No.2 and EGR valve during heavy-load operations	For VRIS and EGR
PCV valve	Controls blowby gas introduced into engine
PRC solenoid valve	Controls vacuum to pressure regulator	-
Pressure regulator	Adjusts fuel pressure supplied to fuel injectors	-
P/S pressure switch	Detects P/S operation	P/S ON when steering wheel turned
Purge solenoid valve	Controls evaporative fumes from charcoal canister to intake manifold	Controlled by duty signal from ECM

Engine control module (ECM)

FunctionDetects following: 1. A/C operation; 2. Air/fuel ratio (oxygen concentration); 3. Atmospheric pressure; 4. Braking signal; 5. Cranking signal; 6. E/L operation; 7. Engine coolant temperature; 8. Engine speed; 9. Ignition ON signal; 10. In-gear condition; 11. Intake air amount; 12. Intake air temperature; 13. EGR valve position; 14. No.1 piston TDC; 15. P/S operation; 16. Test mode signal (ignition timing, idle speed, diagnostic trouble code No.); 17. Throttle valve opening angle; 18. Closed throttle position; 19. Vehicle speed; 20. Knocking

Remarks1. A/C switch; 2. Heated oxygen sensor; 3. Barometric pressure sensor; 4. Brake switch; 5. Ignition switch (START position); 6. Blower motor switch, coolant fan relay, headlight switch, and rear window defroster switch; 7. Engine coolant temperature sensor; 8. Crankshaft position sensor (NE signal); 9. Ignition switch; 10. Neutral / clutch switch (MTX) Transaxle range switch (ATX); 11. Volume air flow sensor; 12. Intake air temperature sensor (in volume air flow sensor); 13. EGR valve position sensor; 14. Camshaft position sensor (SGC signal); 15. P/S pressure switch; 16. Data link connector (TEN terminal); 17. Throttle position sensor; 18. Closed throttle position switch (in throttle position sensor); 19. Vehicle speed sensor; 20. Knock sensor

Engine coolant temperature sensor

FunctionDetects engine coolant temperature; sends signal to ECM

RemarksInstalled on engine

Fuel filter

FunctionFilters particles from fuel

Remarks-

Fuel injector

FunctionInjects fuel into intake port

RemarksControlled by signals from ECM (side-feed type)

Fuel pump

FunctionProvides fuel to fuel injectors

RemarksOperates while engine running; Installed in fuel tank

Fuel pump relay

FunctionVoltage for fuel pump while engine running

Remarks-

Heated oxygen sensor

FunctionDetects oxygen concentration; sends signal to ECM

RemarksZirconium and platinum coating; With heater

Idle air control valve

FunctionSupplies bypass air into intake manifold

RemarksControlled by duty signal from ECM; Installed in BAC valve

Ignition control module

FunctionReceives spark signal from ECM and generates high voltage in ignition coil

RemarksInstalled in distributor

Ignition switch (START position)

FunctionSends engine cranking signal to ECM

Remarks-

Intake air temperature sensor

FunctionDetects intake air temperature; sends signal to ECM

RemarksInstalled in volume air flow sensor

Intake manifold

FunctionSupplies intake air to all cylinders

Remarks

Knock sensor

FunctionDetects knocking; sends signal to ECM

Remarks-

Main relay

FunctionSupplies current to output devices and ECM

Remarks

Neutral/clutch switch (MTX)

FunctionDetects in-gear condition; sends signal to ECM

RemarksSwitch ON in Neutral

One-way check valve

FunctionPrevents misoperation of VRIS shutter valve No.1 and No.2 and EGR valve during heavy-load operations

RemarksFor VRIS and EGR

PCV valve

FunctionControls blowby gas introduced into engine

Remarks

PRC solenoid valve

FunctionControls vacuum to pressure regulator

Remarks-

Pressure regulator

FunctionAdjusts fuel pressure supplied to fuel injectors

Remarks-

P/S pressure switch

FunctionDetects P/S operation

RemarksP/S ON when steering wheel turned

Purge solenoid valve

FunctionControls evaporative fumes from charcoal canister to intake manifold

RemarksControlled by duty signal from ECM

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OUTLINE - COMPONENT DESCRIPTIONS

Component Descriptions (continued)

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