● Engine warm, coolant temperature not below 80°C
● Engine speed 2200…2450 rpm
● Engine at full load
Display
zone
Operating mode or component Specification Evaluation
1 Engine speed 2200...2450 rpm ---
2 Intaken air mass (specified): 690...750 mg/stroke ---
3 Intaken air mass (actual): Approx. intaken air
mass (specified)
⇒ Page 113
4 Duty cycle of exhaust gas recirculation
valve
65...80 % ---
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-
tem ⇒ Page 436
◆ 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. ⇒ Page 411
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-
tem ⇒ Page 436
◆ Unmetered air
– Check intake system for leaks
6.5.4 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 ⇒ Page 129.
◆ The measured values must be read at an engine speed of
2300 rpm (2nd person required).
Test prerequisites
● Engine warm, coolant temperature not below 80°C
● Engine speed 2200…2450 rpm
● Engine at full load
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
6 Measured value blocks, engine codes CPYA, CPYB, CPYC, CPYD, CPYE, CPYF, CPYG
131
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