Display Group 2 - Idling Speed - Volkswagen CJDA Workshop Manual

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
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

5.3.2 Display group 2 - Idling speed

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 Accelerator position
◆ If accelerator position sender -G79- is
installed
3 Accelerator pedal switch positions
4 Coolant temperature
Evaluation: Display group 2, display zone 2 - accelerator
position
Display shows Possible cause of fault
1.0...100.0%
◆ Defective accelerator position sender
◆ Open circuit in wiring to -G79-
96 Repair Group 01 - Vehicle self-diagnosis
-N30...N33- defective
-N30...N33- defective
-G79-
Specification
760...940 rpm
3.0...9.0 mg/stroke
170.0...350.0 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.
Specification
760...940 rpm
0.0 %
---
80.0...110.0°C
Fault remedy
⇒ P age 316
– -G79- Check.
Evaluation
---
⇒ P age 96
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⇒ P age 398
⇒ P age
383.
⇒ P age 398
Evaluation
---
⇒ P age 96
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