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Evaluating measured value blocks, display group 100 -readiness code > < Evaluating measured value block, display groups 50...69 -Governed speed-

Leon Mk1

Evaluating measured value block, display groups 70...75 -Exh. gas recirculation-
   
Evaluating measured value block, display groups 70...75 -Exh. gas recirculation-
Display group 70 -Reducing emissions - Activated charcoal filter system diagnosis (fuel tank venting system)-
l  Engine running at idling speed
l  Coolant temperature, min. 80.0 °C
l  Control unit in mode 04- basic setting
Read measured value block 70→← Indicated on display  
xx.x %xx.x %xx mbarText   
1234← Display fieldsSpecificationEvaluation
    Result of diagnosis of activated charcoal filter system (Test OFF/Test ON/ TVV OK / TVV not OK)TVV OK---
   Intake manifold pressure240...420 mbar---
  Result of current diagnosis> 25%---
 Opening angle13...25%---

  Note!
TVV means fuel tank venting valve (activated charcoal filter system solenoid valve 1).
Notes on display field 1:
t  During the diagnosis the display must fluctuate approx. 6% in range of 13...25%.
   
Display group 74 -Reducing emissions - EGR positioner adaptation-
l  Ignition on, engine not running
l  Control unit in mode 04 -basic setting-
Read measured value block 74→← Indicated on display  
x.x Vx.x Vx.x VText   
1234← Display fieldsSpecificationEvaluation
    Adaptation condition ADP ON / ADP OK or ADP ERRORADP OK---
   Current potentiometer voltage0.3...4.6 V---
  Position 100%2.9...4.6 V---
 Position 0 (basic setting)0.3...1.3 V---

Note on display group 74:
t  Adaptation of exhaust gas recirculation valve takes place when ignition is switched on.
t  When selecting function 04 “basic settings” of display group 74, the engine control unit is adapted to the exhaust gas recirculation valve. This process must be carried out if another exhaust gas recirculation valve (or a complete engine) or another engine control unit has been fitted.
   
Display group 75 -Exhaust gas recirculation system-
l  Engine running at idling speed
l  Control unit in mode 04 -basic setting-
–  Give 5 throttle bursts, raising RPMs to max.
Read measured value block 75→← Indicated on display  
xxxx RPMxxx mbarxxx mbarText   
1234← Display fieldsSpecificationEvaluation
    Result Test OFF/ Test ON Syst. OK / Syst. Not OKSyst. OK---
   Pressure difference at intake manifold50 mbar min.---
  Intake manifold pressure240...4.20 mbar---
 Engine speed1800...5600 RPM---

Note on display field 3:
t  Pressure difference at intake manifold depends on load point. Could cause fault even with a difference of less than 140 mbar.
   

Evaluating measured value blocks, display group 100 -readiness code > < Evaluating measured value block, display groups 50...69 -Governed speed-