Display group 8 during idling (warm engine, coolant temperature not below +85°C)
To carry out the learning process of the lambda control, the solenoid valve for the active carbon canister is closed and the air conditioning compressor is switched off when a display group is selected.
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System in basic setting 8
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⇒
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◂ Indicated on display
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4.37 ms
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0.4 %
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0.1 %
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λ-Adaptation
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Tank breather ▪ λ-Adaptation Mixture formation learning process in progress (solenoid valve 1 for active carbon canister closed) ▪ Tank breather active: conditions for learning mixture formation not met (solenoid valve 1 for active carbon canister closed)
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Learned value for mixture formation at part load (multiplicative) ▪ - 8...+ 8 %: OK ▪ Outside tolerance: Check lambda control => Page 24-33
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Learned value for mixture formation at idling speed (additive) ▪ - 10...+ 10 %: OK ▪ Outside tolerance: Check lambda control => Page 24-33
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Injection period (per engine cycle) ▪ 1.70...5.00 ms: OK ▪ < 1.70 ms: High proportion from tank breather system => Page 24-55 ▪ > 5.00 ms: Engine loaded=> Switch off consumption units
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Display group 95 during idling (warm engine, coolant temperature not below +85°C)
With this display group, the idling stabilisation is blocked and a fixed ignition angle of 12° before TDC is output.
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System in basic setting 95
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◂ Indicated on display
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860 rpm
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2.25 ms
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12.0°BTDC
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93.5 °C
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Coolant temperature
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Ignition timing ▪ Specified as fixed value by engine control unit
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Engine load (injection period per crankshaft revolution)
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Engine speed
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Display group 98 with ignition on
The learning process (adaptation) of the throttle valve control unit to the engine control unit is carried out and checked with this display group.
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System in basic setting 98
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◂ Indicated on display
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4.420 V
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3.880 V
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Idling
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ADP. OK
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Adaptation status ▪ ADP. OK OK ▪ ADP. running . Adaptation is currently being carried out => wait ▪ ADP ERROR Fault occurred during adaptation =>Check throttle valve control unit - Page 24-59
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Operating status ▪ Idling: OK ▪ Other display: Idling switch open => check - Page 24-61
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Voltage from throttle valve actuator -G127 ▪ No specified value
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Voltage from throttle valve potentiometer -G69 ▪ No specified value
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Display group 99 during idling (warm engine, coolant temperature not below +85°C)
For fault search, it is possible to jump between "basic setting" and "read measurement value block" by pressing keys 4 and 8. This specifically switches the lambda control off and on.
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System in basic setting 99
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⇒
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◂ Indicated on display
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860 rpm
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93.5 oC
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0.0 %
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λ-control OFF
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Lambda control switched off
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Control value for mixture formation (lambda control)
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Coolant temperature
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Engine speed
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Read measured value block 99
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⇒
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◂ Indicated on display
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860 rpm
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93.5 °C
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- 0.7 %
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λ-control ON
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Lambda control switched on
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Control value for mixture formation (lambda control)
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Coolant temperature
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Engine speed
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