Volkswagen CPYC User Manual

5.3.3 Display group 3 - Exhaust gas recirculation
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 Intaken air mass (specified): 280...460 mg/stroke ---
3 Intaken air mass (actual):
280...480 mg/stroke
1)
⇒ Page 97
4 Duty cycle of exhaust gas recirculation
valve
70...100 % ---
1)
The specification applies for deactivated exhaust gas recirculation system. (Duty cycle of exhaust gas recirculation valve in display
zone 4 at 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-
tem ⇒ Page 436
◆ Unmetered air
– Check intake system for leaks
Above specification
◆ Engine too cold
– Run engine at increased speed to
warm up, and repeat test
◆ Insufficient exhaust gas recirculation
– Engine running for a long time at idling
speed, give burst on throttle
◆ Defective air mass meter -G70-
– -G70- Check. ⇒ Page 411
5.3.4 Display group 4 - Activation of injectors
-N30...N33-
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 Start of main injection activation -5...5°CrS
⇒ Page 97
3 Duration of main injection activation 350...700 ms ---
4 Pressure in high-pressure fuel system
(actual)
170...350 bar ---
Evaluation: display group 4, display zone 2 - start of main
injection activation:
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
5 Measured value blocks, engine codes CJDA, CJDD
97

Volkswagen CPYC Specifications

General

Brand	Volkswagen
Model	CPYC
Category	Engine
Language	English