Isuzu 4HL1, Workshop Manual

Page: 88 / 267

1A-86 Engine Control System
18/31 PTO Idle Position
Switch ON/OFF This parameter refers to the
working condition of the PTO
accelerator. It appears on the
display when the PTO
accelerator is not working (the
PTO accelerator position is about
0 %). When the display is fixed, the
PTO idle position switch, circuit,
VIM, or ECM may be faulty.
19/31 QWS Switch ON/OFF This parameter refers to the
status of the signals input from
the QWS (quick warm-up
system) switch to the VIM. It
appears on the display after the
QWS switch in the cab is
pressed. When the display is fixed, the
QWS switch, circuit, VIM, or ECM
may be faulty.
20/31 Glow Time Lamp ON/OFF This parameter refers to the
status of the signals output from
the VIM to the glow lamp. It
appears on the display after
necessary conditions such as
engine speed, engine coolant
temperature, and starter are met. When the display is fixed, the
lamp, circuit, VIM,or ECM may be
faulty.
21/31 ECO Relay ON/OFF This parameter refers to the
status of the signals output from
the VIM to the ECO relay. It
appears on the display after
necessary conditions such as
battery voltage, engine coolant
temperature, vehicle speed,
QWS switch, neutral switch, and
idle stop switch are met. When the display is fixed, the
relay, circuit, VIM, or ECM may
be faulty.
22/31 Engine Stop
Switch ON/OFF This parameter refers to the
status of the signals input from
the engine stop switch to the
VIM. (The unit is always OFF.) When the display is fixed, the
engine stop switch, circuit, VIM,
or ECM may be faulty.
23/31 Engine Start
Counts Counts This parameter refers to the
accumulated count of starter
operations. When the count number exceeds
150000, DTC18 is issued.
24/31 Engine Start
Counts (After
Starter Replace) Counts This parameter refers to the
accumulated count of starter
operations after the starter is
replaced. When the count number exceeds
150000, DTC18 is issued.
25/31 ASR Installation Installed/
Not
installed
This parameter refers to the
status whether the ASR is
installed to the vehicle. When the display is fixed,
communications with ABS/ASR
control unit, ABS/ASR system,
VIM, ECM, or ABS/ASR control
unit may be faulty.
26/31 ASR Accelerator
Opening % When the ASR is working, the
accelerator position is limited (the
position is normally reduced from
100 %). This parameter refers to
the percentage calculated by the
VIM using the signals input from
the ASR controller. When the display is fixed,
communications with ABS/ASR
control unit, ABS/ASR system,
VIM, ECM, or ABS/ASR control
unit may be faulty.
Item
Tech 2 Data
Display
Units
displayed
Description How to use parameters