Chapter 4 EI system diagnosis Section 2 EI system technical features
4—7
COMPENSATION OF INJECTION TIME (VOLUME)
The following different signals are output from the respective sensors for compensation of the fuel injection time
(volume).
SIGNAL
DESCRIPTION
WATER COOLANT TEMPERATURE
SENSOR SIGNAL
When engine temperature is low, injection time (volume) is
increased.
INTAKE AIR TEMPERATURE SENSOR
SIGNAL
When intake air temperature is low, injection time (volume) is
increased.
BATTERY VOLTAGE SIGNAL
ECU operates on the battery voltage and at the same time, it
monitors the voltage signal for compensation of the fuel injection
time (volume). A longer injection time is needed to adjust injection
volume in the case of low voltage.
ENGINE RPM SIGNAL At high speed, the injection time (volume) is increased.
STARTING SIGNAL
When starting engine, additional fuel is injected during cranking
engine.
ACCELERATION SIGNAL
/ DECELERATION
SIGNAL
During acceleration, the fuel injection time (volume) is increased in
accordance with the throttle opening speed and engine rpm. During
deceleration, the fuel injection time (volume) is decreased.
INJECTION STOP CONTROL
SIGNAL
DESCRIPTION
OVER-REV. LIMITER SIGNAL
The fuel injectors stop operation when engine rpm reaches rev. limit
rpm.
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