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Self-diagnosis
Readout specifications for boost pressure control
Display group 11 at full throttle (test drive in 3rd or 4th gear, coolant temperature not below +85 °C)
- engine codes AGR and ALH
Warning! The V.A.G 1551 fault reader must be operated by a second person!
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Read measured value block 11
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⇒
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◂ Indicated on display
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3340 rpm
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1830 mbar
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1850 mbar
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68 %
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Duty cycle (activation) of boost pressure control solenoid -N75
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Current boost pressure
▪ If as specified in display zone 2 (tolerance ±100 mbar) okay.
▪ Boost pressure too low: no boost pressure control => test, Page 23-43
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Boost pressure specified by control unit
▪ 1800...2050 mbar okay
▪ > 2050 mbar: boost pressure increased as a result of tuning
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Engine speed 2900...4000 rpm OK
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Display group 11 at full throttle (test drive in 3rd or 4th gear, coolant temperature not below +85 °C)
- engine code AHF
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Read measured value block 11
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⇒
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◂ Indicated on display
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3340 rpm
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1948 mbar
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1917 mbar
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57 %
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Duty cycle (activation) of boost pressure control solenoid -N75
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Current boost pressure
▪ If as specified in display zone 2 (tolerance ±100 mbar) OK
▪ Boost pressure too low: Check load pressure control =>Page 23-43
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Boost pressure specified by control unit
▪ 1800...2250 mbar OK
▪ Over 2250 mbar: boost pressure increased as a result of tuning
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Engine speed, 2900...4000 rpm OK
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