Display
zone
Operating mode or component
Specification
Evaluation
1
Engine speed
760...940 rpm
---
2
Average injection quantity
3.0...9.0 mg/stroke
3
Pressure in high-pressure fuel system
(actual)
170.0...350.0 bar
---
4
Coolant temperature
80.0...110.0°C
---
Evaluation: Display group 1, display zone 2 - quantity injec-
ted
Display shows
Possible cause of fault
Fault remedy
Below specification
◆
Injectors for cylinders 1…4
-N30...N33- defective
– -N30...N33- Check.
Above specification
◆
Engine too cold
– Run engine at increased speed to
warm up, and repeat test
◆
Shortage of fuel
◆
Air in fuel system
– Check fuel supply system
, removing and installing
parts of fuel supply system
– Bleeding fuel system
.
◆
Injectors for cylinders 1…4
-N30...N33- defective
– -N30...N33- Check.
5.3.2 Display group 2 - Idling speed
Test prerequisites
● Engine running at idling speed.
● Engine warm, coolant temperature not below 80°C.
● Intake air temperature < 40°C.
Display
zone
Operating mode or component
Specification
Evaluation
1
Engine speed
760...940 rpm
---
2
Accelerator position
0.0 %
◆
If accelerator position sender -G79- is
installed
3
Accelerator pedal switch positions
---
---
4
Coolant temperature
80.0...110.0°C
---
Evaluation: Display group 2, display zone 2 - accelerator
position
Display shows
Possible cause of fault
Fault remedy
1.0...100.0%
◆
Defective accelerator position sender
-G79-
◆
Open circuit in wiring to -G79-
– -G79- Check.
3
Industriemotoren - Industrial Engines 2009
▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
96
Repair Group 01 - Vehicle self-diagnosis