Qosii Preheating System (4Jb1/4Jb1T/4Jb1Tc Only) - Isuzu NHR 4J Series Workshop Manual

General Description....................................................................................................... 6D6 - 1
System Diagram............................................................................................................. 6D6 - 2
Inspection on QOS II system Operation ...................................................................... 6D6 - 3
QOSII System Troubleshooting.................................................................................... 6D6 - 4
QOS II 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,
thermoswitch, relay, and glow plug ( 4 pcs).
SECTION 6D6
QOSII PREHEATING SYSTEM
(4JB1/4JB1T/4JB1TC 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.
QOSII PREHEATING SYSTEM 6D6 – 1
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