Display Group 1 - Injected Quantity; Display Group 3 - Exhaust Gas Recirculation - Volkswagen CJDA Workshop Manual

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Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015

6.5.2 Display group 1 - Injected quantity

Note
◆ To perform the test increase engine speed from 1500 rpm to
full throttle at full load. Note conditions for measurements at
⇒ P age
full load 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
Display Operating mode or component
zone
1 Engine speed
2 Average injection quantity
3 Pressure in high-pressure fuel system
(actual)
4 Coolant temperature
Evaluation: Display group 1, display zone 2 - quantity injec-
ted
Display shows Possible cause of fault
Below specification
◆ Injectors for cylinders 1...4
Above specification
◆ Engine too cold
◆ Shortage of fuel
◆ Air in fuel system
◆ Injectors for cylinders 1...4

6.5.3 Display group 3 - Exhaust gas recirculation

Note
◆ To perform the test increase engine speed from 1500 rpm to
full throttle at full load. Note conditions for measurements at
⇒ P age
full load 129.
◆ The measured values must be read at an engine speed of
2300 rpm (2nd person required).
Test prerequisites
130 Repair Group 01 - Vehicle self-diagnosis
-N30...N33- defective
-N30...N33- defective
Specification
2200...2450 rpm
30.0...37.0 mg/H
1600.0...1900.0 bar
80.0...110.0°C
Fault remedy
– -N30...N33- Check.
– Run engine at increased speed to
warm up, and repeat test
– Check fuel supply system
⇒ P age
298, removing and installing
parts of fuel supply system
– Bleeding fuel system
– -N30...N33- Check.
Evaluation
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⇒ P age 130
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⇒ P age 398
⇒ P age
383.
⇒ P age 398