Glow Plug Control System - International VT 365 Service Manual

Glow Plug Control System

Figure 40 Glow plug control system
The glow plug control system warms the engine
cylinders to aid cold engine starting and reduce
exhaust emissions during warm-up.
The Electronic Control Module (ECM) is programmed
to energize the glow plugs (through the glow plug
relay), while monitoring programmed conditions
for engine coolant temperature and atmospheric
pressure.
The ECM monitors battery voltage and uses
information from the Barometric Absolute Pressure
(BAP) sensor and Engine Coolant Temperature (ECT)
sensor to determine the amount of time that the WAIT
TO START lamp is ON and the activation time of the
glow plugs. The ECM controls the WAIT TO START
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
ENGINE SYSTEMS
lamp and the activation of the glow plugs separately.
The glow plugs are self limiting and do not require
cycling on and off. The glow plug relay will only cycle
on and off repeatedly if system voltage is greater than
14.0 volts.
Glow plugs are activated for a longer time, if the
engine is cold or the barometric pressure is low (high
altitude).
The engine is ready to start when the WAIT TO START
lamp is turned off by the ECM. The glow plugs can
remain on up to 120 seconds, while the engine is
running, to reduce exhaust emissions during engine
warm-up.
EGES295-2
Follow all warnings, cautions, and notes.
© 2006 International Truck and Engine Corporation
47