Isuzu 4HL1 Workshop Manual page 85

Tech 2 Data
Item
Display
58/63 Starter Relay
59/63 Glow Time Lamp
60/63 QWS Switch
61/63 ECO Relay
62/63 Freezer Switch
63/63 Transmission
Coding
Units
displayed
ON/OFF This parameter refers to the
status of the signals output from
the ECM to the starter cut relay. It
appears on the display after
necessary conditions such as
neutral, clutch, and starter
switches are met.
ON/OFF This parameter refers to the
status of the signals output from
the ECM to the glow lamp. It
appears on the display after
necessary conditions such as
engine speed, engine coolant
temperature, and starter are met.
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.
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
clutch switch are met.
ON/OFF This parameter refers to the
status of the signals input from
the freezer switch to the VIM. It
appears on the display after the
freezer controller outputs the
switch-on signal.
MT/AT This parameter refers to the
transmission type, manual or
automatic transmission.
Engine Control System 1A-83
Description How to use parameters
When the display is fixed, the
relay, circuit, or ECM may be
faulty.
When the display is fixed, the
lamp, circuit, or ECM may be
faulty.
When the display is fixed, the
QWS switch, circuit, VIM, or ECM
may be faulty.
When the display is fixed, the
relay, circuit, VIM, or ECM may
be faulty.
When the display is fixed, the
freezer switch, circuit, VIM, or
ECM may be faulty.
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