Isuzu 4HL1 Workshop Manual page 81

Tech 2 Data
Item
Display
23/63 EGR Current
Position
24/63 Intake Throttle
Valve
25/63 Actual Intake
Throttle position
26/63 Desired Intake
Air Throttle
Position
27/63 Intake Throttle
Duty Ratio
28/63 Desired Injection
Quantity
29/63 Desired Fuel
Injection Timing
30/63 Cylinder 1
Compensation
31/63 Cylinder 2
Compensation
32/63 Cylinder 3
Compensation
Units
displayed
mm This parameter refers to the
value calculated by the ECM
using the signals from the EGR
position sensor.
V This parameter refers to the
voltage signal input to the ECM
from the ITP (intake throttle
position) sensor. (Larger intake
throttle valve position provides
higher voltage.)
°CA This parameter refers to the
value calculated by the ECM
using the signals from the ITP
sensor.
°CA This parameter refers to the
value calculated by the ECM
using engine speed, desired fuel
injection amount, and engine
coolant temperature, or the value
determined from the parameters
showing vehicle condition such
as exhaust brake and idling stop.
% This parameter refers to the
value calculated by the ECM
using ITP sensor output voltage
and battery voltage.
3
mm /st This parameter refers to the
value calculated by the ECM
using accelerator position,
engine speed, engine coolant
temperature, and barometric
pressure.
°CA This parameter refers to the
value calculated from intake air
temperature, engine coolant
temperature, engine speed, and
desired fuel injection quantity.
3
mm /st This parameter refers to the
calibrated fuel injection quantity
calculated using the signals from
CKP and CMP sensors.
3
mm /st This parameter refers to the
calibrated fuel injection quantity
calculated using the signals from
CKP and CMP sensors.
3
mm /st This parameter refers to the
calibrated fuel injection quantity
calculated using the signals from
CKP and CMP sensors.
Engine Control System 1A-79
Description How to use parameters
When the display deviates from
the specified level, the DC motor,
EGR valve, sensor, circuit, or
ECM may be faulty.
When the display deviates from
the specified level as the intake
throttle valve is operated, the
sensor, circuit, intake throttle
valve, or ECM may be faulty.
When the display deviates from
the specified level, the DC motor,
intake throttle valve, sensor,
circuit, or ECM may be faulty.
When the display deviates from
the specified level, the intake
throttle valve, sensors, circuit, or
ECM may be faulty.
When the display deviates from
the specified level, the intake
throttle valve, sensors, circuit, or
ECM may be faulty.
When the display deviates from
the specified level, the fuel
injection system, sensors, circuit,
or ECM may be faulty.
When the display deviates from
the specified level, the fuel
injection system, sensors, circuit,
or ECM may be faulty.
When the display deviates from
the specified level, the injector,
fuel injection system, sensors,
circuit, or ECM may be faulty.
When the display deviates from
the specified level, the injector,
fuel injection system, sensors,
circuit, or ECM may be faulty.
When the display deviates from
the specified level, the injector,
fuel injection system, sensors,
circuit, or ECM may be faulty.