Engine Start Control - Hitachi ZW180 Technical Manual

ENGINE START CONTROL

Purpose: To control time for continuity of current for the
intake air heater according to temperature in
the intake manifold and improve the starting
of engine.
Operation:
1. The intake manifold temperature sensor sends
the signals according to temperature in the intake
manifold to ECM.
2. ECM controls the exciting time of intake air heater
relay according to the signal. Therefore, the time
for continuity of current for intake air heater is
controlled.
(Refer to the Electrical System group.)
SYSTEM / ECM System
T2-2-4
Intake Manifold Temperature
Sensor
ECM
From Battery
Relay
Intake Air
Heater Relay
Intake Air Heater
T4GD-02-02-003