Isuzu 4HL1, Workshop Manual

Page: 75 / 267

Engine Control System 1A-73
Barometric Pressure Sensor V —
Approx. 3.6
(The value will change
depending on the
barometric pressure)
Barometric Pressure kPa
100 (DTC61 or DTC84 is
detected)
Approx. 100
(The value will change
depending on the
barometric pressure)
Desired Rail Pressure MPa
60 or less ( DTC115,
DTC118, DTC227,
DTC245, or DTC247 is
detected)
Approx. 47.6 ~ 48.0
Actual Rail Pressure MPa — Approx. 47.6 ~ 48.0
Common Rail Pressure Sensor V — Approx. 1.7
SCV Duty Ratio % — Approx. 48
SCV Current mA — Approx. 979 ~ 1004
EGR Duty Cycle % — Approx. 13 ~ 17
EGR Position Sensor V — Approx. 3.6
EGR Target Lift Position mm — Approx. 9.5
EGR Current Position mm — Approx. 9.5
Intake Throttle Valve V — Approx. 1.8
Actual Intake Throttle position °CA — Approx. 30.2
Desired Intake Air Throttle Position °CA — Approx. 30
Intake Throttle Duty Ratio % — Approx. 9 ~ 10
Desired Injection Quantity mm
3
/st
50 or less (DTC115,
DTC118, DTC227,
DTC245, or DTC247 is
detected)
Approx. 11.3 ~ 11.4
Desired Fuel Injection Timing °CA — Approx. 6.3 ~ 6.4
Cylinder 1 Compensation mm
3
/st
0 (DTC158 or DTC271 is
detected)
0
Cylinder 2 Compensation mm
3
/st
0 (DTC159 or DTC272 is
detected)
0
Cylinder 3 Compensation mm
3
/st
0 (DTC159 or DTC273 is
detected)
0
Cylinder 4 Compensation mm
3
/st
0 (DTC158 or DTC274 is
detected)
0
Main Injection Quantity mm
3
/st — Approx.11.3 ~ 11.4
Pilot Injection Quantity mm
3
/st — —
Pilot Interval µsec — —
Main Injection Period µsec — Approx. 800 ~ 810
Pilot Injection Period µsec — 0
Accelerator Switch ON/OFF OFF(DTC84 is detected) OFF
Tech 2 Data Display Units displayed Fail-safe values
Values at around
1500 rpm