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Reading measured value block
Readout specifications for exhaust gas recirculation
Display Group 003 at idling speed (engine warm, coolant temperature not below 80 °C)
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Read measured value block 3
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⇒
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◂ Indicated on display
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XXXX rpm
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XXX mg/stroke
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XXX mg/stroke
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XX %
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Duty cycle (activation) of exhaust gas recirculation valve
▪ No specification
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Current intake air mass 210 ... 350: okay 1)
▪ Air mass too small:
▪ unmetered air in intake tract; excessive exhaust gas recirculation => test 5)
▪ Air mass too great:
▪ too little exhaust gas recirculation => test 5)
▪ Constant 539 mg/stroke:
▪ substitute value => interrogate fault memory
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Air mass specified by control unit: 230 ... 420 mg/stroke: okay
▪ > 420 mg/stroke: engine too cold => run engine till warm
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Engine speed
▪ Front-wheel drive 800...900 rpm okay
▪ Four-wheel drive 860...940 rpm okay
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1)Exhaust gas recirculation switches off after 2 minutes idling. If necessary, open throttle briefly (above 1500 rpm)
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