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Self diagnosis
Display group overview
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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 overall range (0...90 <°)
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Throttle valve potentiometer -path 1
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Coolant temperature
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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 activated charcoal filter system
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Battery voltage
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ABD, ABU
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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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 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)
The relevance of figures in the number block will, if necessary, be described in the individual repair sequences.
2)
This value must not be used to check or adjust the ignition timing.
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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>,>72)
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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)
The relevance of figures in the number block will, if necessary, be described in the individual repair sequences.
2)
On engine code ABD ▸ 09.94 the speed will not be shown.
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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)
The relevance of figures in the number block will, if necessary, be described in the individual repair sequences.
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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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Engine code AEA only:
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 on1)
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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 on1)
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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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