Display Group 3 - Exhaust Gas Recirculation; Display Group 4 - Activation Of Injectors -N30; Display Group - Volkswagen CJDA Workshop 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 Operating mode or component
zone
1 Engine speed
2 Intaken air mass (specified):
3 Intaken air mass (actual):
4 Duty cycle of exhaust gas recirculation
valve
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
Below specification
◆ Excessive exhaust gas recirculation
◆ Unmetered air
Above specification
◆ Engine too cold
◆ Insufficient exhaust gas recirculation
◆ Defective air mass meter -G70-
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 Operating mode or component
zone
1 Engine speed
2 Start of main injection activation
3 Duration of main injection activation
4 Pressure in high-pressure fuel system
(actual)
Evaluation: display group 4, display zone 2 - start of main
injection activation:
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
5 Measured value blocks, engine codes CJDA, CJDD
Industriemotoren - Industrial Engines 2009 ▶
Specification
760...940 rpm
280...460 mg/stroke
1)
280...480 mg/stroke
70...100 %
Fault remedy
– Check exhaust gas recirculation sys-
⇒ P age 436
tem
– Check intake system for leaks
– Run engine at increased speed to
warm up, and repeat test
– Engine running for a long time at idling
speed, give burst on throttle
– -G70- Check.
Specification
760...940 rpm
-5...5°CrS
350...700 ms
170...350 bar
3
Evaluation
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⇒ P age 97
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⇒ P age 411
Evaluation
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⇒ P age 97
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97