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Self diagnosis
Display group overview
Note:
The specifications are only valid when the test conditions listed in the table have been fulfilled.
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Display group 00 (decimal displayed figure)
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Test conditions
▪ Engine running at idling speed
▪ Coolant temperature at least 80 °C
▪ Electrical consumers switched off
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Display zones
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Specification
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Adaption figure for activ. charcoal filter system
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Battery voltage
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AEV
ADX, AEA
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150...180
140...170
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Rpm regulator for idling stabilization
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0...25
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Adaption figure for basic air requirement
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250...255 or 0...10
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Adaption figure for mixture correction
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AEV, ADX
AEA
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230...255 or 0...30
220...255 or 0...30
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Lambda integrator
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90...170
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Intake air temperature
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88...45
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Engine rpm
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30...34
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Throttle valve potentiometer - path 1
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10...70
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Coolant temperature
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22...11
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Display group 00 (decimal displayed value)
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▪ Engine not running, ignition switched on
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Display zones
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Adaption value for activated charcoal filter system
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Battery voltage
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Adaption value for idling speed stabilization
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Adaption value for basic air requirement
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Adaption value for mixture correction
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Adaption value for activated charcoal filter valve
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Idling switch
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Throttle valve potentiometer -path 2
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Throttle valve potentiometer -path 1
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Coolant temperature
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Display zones
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1
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2
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3
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4
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Display group 01 -Idling test-
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Display
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0...xxxx rpm
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-xx.x...xxx.x °C
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0.x.x... 1.xx
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xxxxxxxx
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Indicated
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Engine speed
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Coolant temperature
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Lambda correction factor
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Operating conditions2)
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Display group 02 -Injection period, intake air temperature-
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Display
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0...xxxx rpm
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0.0...xxx.x ms
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0.0...xx.x V
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-xx.x...xxx.x °C
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Indicated
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Engine speed
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Injection period
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Battery voltage
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Intake air temperature
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Display group 03 -Engine load condition-
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Display
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0...xxxx rpm
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0...xxx %
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0...xxx <°
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-xx.x° before TDC...xx.x° after TDC
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Indicated
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Engine speed
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Engine load signal
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Throttle valve angle (calculated figure, dependent on throttle valve potentiometer)
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Ignition timing figure (calculated figure, dependent on the ignition timing adjustment)
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1)
Relevance of figures in 8 digit number block
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Display zones
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1
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2
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3
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4
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Display group 04 -Operating conditions-
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Display
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0...xxxx rpm
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0...xxx %
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0,>4>,>7
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xxxxxxxx
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Indicated
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Engine speed
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Engine load signal
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Speed
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Operating condition1)
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Display group 05 -Mixture regulation-
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Display
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0...xxxx rpm
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0...xxx %
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0.xx...1.xx
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-xx.x...xx.x %
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Indicated
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Engine speed
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Duty cycle from activated charcoal filter solenoid valve 1
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Lambda correction factor
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Mixture correction factor
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Display group 06 -Activated charcoal filter system-
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Display
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0...xxxx rpm
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0...xxx %
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0.xx...1.xx
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-xx.x...xx.x %
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Indicated
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Engine speed
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Duty cycle from activated charcoal filter solenoid valve 1
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Lambda correction factor
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Mixture correction factor
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1)
Relevance of figures in 8 digit number block => Page 01-33
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Display zones
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1
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2
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3
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4
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Display group 07 -Lambda control-
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Display
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0...xxxx rpm
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0.000...xx.xxx V
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0.xx...1.x.x
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xxxxxxxx
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Indicated
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Engine speed
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Lambda probe voltage
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Lambda correction factor
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Operating condition1)
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Display group 08 -Knock control-
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Display
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0...xxxx rpm
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0.00...xx.xx ms
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0.0...xx.x °CA
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0.0...xx.x °CA
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Indicated
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Engine speed
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Load
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Knock control No. 1 cyl., ignition retardation
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Knock control No. 2 cyl., ignition retardation
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Display group 09 -Knock control-
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Display
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0...xxxx rpm
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0.00...xx.xx ms
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0.0...xx.x °CA
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0.0...xx.x °CA
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Indicated
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Engine speed
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Load
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Knock control No. 3 Cyl., ignition retardation
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Knock control No. 4 cyl., ignition retardation
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1)
Relevance of figures in 8 digit number block => Page 01-33
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Display zones
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1
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2
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3
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4
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Display group 10 -Knock control-
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Display
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0...xxxx rpm
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0.00...xx.xx ms
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0.000...xx.xxx V
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0.000...xx.xxx V
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Indicated
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Engine speed
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Load
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Integral knock No. 1 Cyl.
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Integral knock No. 2 Cyl.
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Display group 11 -Knock control-
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Display
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0...xxxx rpm
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0.00...xx.xx ms
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0.000...xx.xxx V
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0.000...xx.xxx V
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Indicated
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Engine speed
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Load
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Integral knock No. 3 Cyl.
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Integral knock No. 4 Cyl.
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Significance of figures in 8 digit number block
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Relevance when displayed digit = 1
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x
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x
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x
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x
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x
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x
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x
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x
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Display group 01
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Display group 04
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Display group 07
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1
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No. 1 Cyl. recognised
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---
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1
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Idling switch closed
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Activated charcoal filter system solenoid valve 1 active
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1
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Automatic gearbox recognised1)
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Lambda control active
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1
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Air conditioner compressor switched on
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Acceleration or full load enrichment
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Acceleration or full load enrichment
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1
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Air conditioner switched on
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Full load recognised
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Full load recognised
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1
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Speed boost gear engaged1)
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Part load recognised
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Part load recognised
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1
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Torque reduction3)
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Idling switch closed
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Idling switch closed
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1
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Gear engaged2)
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Overrun cut-off active
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Overrun cut-off active
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1)
A 1 must not be displayed.
2)
If a 1 is displayed, the wiring from control unit contact 12 to earth has open circuit.
3)
Display must always show 1.
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