Display
zone
Operating mode or component
Specification
Evaluation
3
Intaken air mass (actual):
Approx. intaken air
mass (specified)
4
Duty cycle of exhaust gas recirculation
valve
80...100 %
---
Evaluation: display group 3, display zone 3 - intaken air
mass (actual)
Display shows
Possible cause of fault
Fault remedy
Below specification
◆
Excessive exhaust gas recirculation
– Check exhaust gas recirculation sys-
◆
Unmetered air
– Check intake system for leaks
Above specification
◆
Engine too cold
– Warm up engine, and repeat test
◆
Insufficient exhaust gas recirculation
– Give burst on throttle
◆
Defective air mass meter -G70-
– -G70- Check.
Evaluation: display group 3, display zone 4 - duty cycle of
exhaust gas recirculation valve
Display shows
Possible cause of fault
Fault remedy
Below specification
◆
Excessive exhaust gas recirculation
– Check exhaust gas recirculation sys-
◆
Unmetered air
– Check intake system for leaks
5.4.4 Display group 8 - torque limit 1
Note
◆
To perform the test increase engine speed from 1500 rpm to
full throttle at full load. Note conditions for measurements at
full load
.
◆
The measured values must be read at an engine speed of
3000 rpm (2nd person required).
Test prerequisites
● Engine warm, coolant temperature not below 80°C
● Engine speed 2800…3200 rpm
● Engine at full load
Display
zone
Operating mode or component
Specification
Evaluation
1
Engine speed
2800...3200 rpm
---
2
Desired torque
xxx Nm
---
3
Torque limit
xxx Nm
---
4
Smoke limiting
xxx Nm
---
3
Industriemotoren - Industrial Engines 2009
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Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
108
Repair Group 01 - Vehicle self-diagnosis