
SYSTEM DESCRIPTION
Fuel Pump
Fuel Tank
Fuel Pulsation Damper
ISC Valve
Pressure Regulator
Cold Start Injector
Air Flow Meter
Air Temp. Sensor
Start Injector Time Switch
Throttle Position Sensor
Oxygen Sensor
Knock Sensor
Water Temp. Sensor
Distributor
ECU
Ignition Switch
Speed Sensor
Battery
Terminal VF
VSV for EGR
Air Conditioner
Ignition Coil w/Igniter
Check Engine Warning Light
Check Connector
Neutral Start Switch (For A/T)
The EFI used on Toyotas has three basic systems.
FUEL SYSTEM
An electric fuel pump supplies sufficient fuel, under a constant pressure, to the EFI injectors. These injectors inject a metered quantity of fuel into the intake manifold in accordance with signals from the ECU. Each injector injects, at the same time, one half of the fuel required for ideal combustion with each engine revolution.
AIR INDUCTION SYSTEM
The air induction system provides sufficient air for engine operation.
ELECTRONIC CONTROL SYSTEM
The 5M-GE engine is equipped with a Toyota Computer Control System (TCCS) which centrally controls the EFI, ESA, EGR, Diagnosis systems, etc. by means of Electronic Control Unit (ECU — formerly EFI computer) employing a microcomputer.