Display
zone
Operating mode or component
Specification
Evaluation
3
Charge pressure (actual)
1600...1900 mbar
4
Duty cycle of charge pressure control sol-
enoid valve
35...70 %
---
Evaluation: display group 11, display zone 3 - charge pres-
sure (actual)
Display shows
Possible cause of fault
Fault remedy
Below specification
◆
Leaks between turbocharger and en-
gine (charge air system)
◆
Charge pressure control defective
– Checking charge air system for leaks
– Checking charge pressure control
Above specification
◆
Charge pressure control defective
◆
Turbocharger defective
– Checking charge pressure control
◆
Defective charge pressure sender
-G31-
6.5
Evaluating measured value blocks at
full load (engine code CPYB)
Note conditions for measurements at full load
Display group:
◆
1 - Injected quantity
◆
3 - Exhaust gas recirculation
,
◆
8 - Torque limit 1
◆
11 - Charge pressure control
6.5.1 Conditions for measurements at full load
Always follow safety precautions
.
.
Note
Due to the various use cases of industrial engines, check
whether the engine attains full load under the respective operat-
ing conditions before performing measurements at full load.
– At full load, increase engine speed from 1500 rpm to full
throttle (accelerator pedal position sender at end stop).
– Have a second person read the measured values at approx.
2300 rpm.
– Exit diagnosis function.
– Switch off ignition.
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
129