Volkswagen CJDA Workshop Manual page 106

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Procedure
– Connect vehicle diagnostic tester, and select engine control
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unit.
– Select diagnosis function "03-Final control diagnosis". En-
gine must be idling.
Activating exhaust gas recirculation valve -N18-
Note
After the diagnosis function "03-Final control diagnosis" has
been selected, the first final control, here the exhaust gas recir-
culation valve -N18-, is activated.
The exhaust gas recirculation valve -N18- is activated.
The displays in display zones 3 and 4 must fluctuate within fol-
lowing control range:
● Specification in display zone 3: 180...470 mg/stroke
● Specification in display zone 4: 70...100%
Note
The activation of the valve can also be checked by touching it.
If the valve is not activated:
– Proceed with final control diagnosis until completed.
– Check exhaust gas recirculation
Activating charge pressure control solenoid valve -N75-
– Press button.
→
The charge pressure control solenoid valve -N75- is activated.
The displays in display zones 2, 3 and 4 must fluctuate within
following control range:
Display zone 2 OFF:
● Specification in display zone 3: 900...1150 mbar
● Specification in display zone 4: 90...100%
Display zone 2 ON:
● Specification in display zone 3: 100 mbar higher than with
display OFF
● Specification in display zone 4: 95%
Note
◆ The activation of the valve can also be checked by touching
it.
◆ During activation, the linkage of the charge pressure control
vacuum unit on the turbocharger must move back and forth.
If the valve is not activated:
– Proceed with final control diagnosis until completed.
– Check the charge pressure control
90 Repair Group 01 - Vehicle self-diagnosis
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436.
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333.