5.4.5 Display group 11 - Charge pressure control
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
Charge pressure (specified)
2100..2300 mbar
---
3
Charge pressure (actual)
2100...2300 mbar
4
Duty cycle of charge pressure control sol-
enoid valve
20...60 %
---
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
Measured value blocks, engine
codes CPYA, CPYB, CPYC,
CPYD, CPYE, CPYF, CPYG
“Reading measured value block”
Evaluate measured value blocks:
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
109