Qosiii Preheating System (4Jg2 Only) Contents - Isuzu NHR 4J Series Workshop Manual

General Description....................................................................................................... 6D7 - 1
System Diagram............................................................................................................. 6D7 - 2
Inspection on QOS III system Operation ..................................................................... 6D7 - 5
QOS III preheating system features a quick-on glow
plug with thermometer control of the glowing time and
the afterglow time function.
The system consists of a controller, indicator lamp,
thermosensor, vehicle speedsensor, dropping resistor,
relay (2 pcs), and temperature self-control type glow
plug (4 pcs)
SECTION 6D7
QOSIII PREHEATING SYSTEM
(4JG2 ONLY)
GENERAL DESCRIPTION
CONTENTS
With the employment of the thermoswitch, the glow
time changes according to the engine coolant
temperature, thus allowing optimum starting conditions
to be obtained.
The afterglow
thermosensor, vehicle speed sensor, and the engine
runstall sensor (charge relay).
QOSIII PREHEATING SYSTEM 6D7 – 1
time function
PAGE
is controlled by