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Self-diagnosis
Display group overview
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Display group 0 (decimal displayed value)
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Test conditions
▪ Engine runs at idling speed
▪ The coolant temperature is at least 80 °C
▪ The electrical consumers are switched off
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Display zones
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Specification
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Corresponds to
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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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Engine speed
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65...75
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650...750 rpm
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Injection period
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10...21
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3.9...8.1 ms
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Throttle valve angle
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8...15
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3.6...6.3 <°
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Lambda probe status
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0...4
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---
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Lambda integrator
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102...154
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128 = Lambda 1
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Lambda probe signal
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0...205
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0...1.0 V
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Engine load
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40...68
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2.0...3.4 ms
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Coolant temperature
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176...229
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80...115 °C
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Battery voltage
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176...213
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12.0...14.5 V
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Intake air temperature
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75...158
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15...70 °C
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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 1
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Display
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xxxxrpm
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xx.x °C
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x.x V
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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 probe voltage
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Adjustment conditions2)
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Specification1)
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650...7502)
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80...115
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0...1.0 fluctuating
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00000000
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Display group 2
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Display
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xxxx rpm
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xx.x ms
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xx.x V
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xx.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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Specification1)
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650...7502)
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3.9...8.1
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12.0...14.5 V
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15...70
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1)
The specifications must be attained when:
- engine runs at idling speed,
- the coolant temperature is at least 80 °C and
- electrical consumers are switched off
2)
Under the following conditions the idling speed is raised by the control unit:
- Battery voltage too low: up to 900 rpm
- After a long full throttle drive and at higher temperatures: up to 960 rpm
3)
Significance of numbers 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 3
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Display
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xxxx rpm
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xx.x ms
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xx <°
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xx.x V
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Indicated
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Engine speed
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Engine load
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Throttle valve angle
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Voltage value for throttle valve opening from throttle valve potentiometer
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Specification1)
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650...7502)
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2.0...3.4
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3.6...6.3
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---
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Display group 4
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Display
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xxxx rpm
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xx.x ms
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xxx km/h
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xxxxxxxx
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Indicated
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Engine speed
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Engine load
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Speed
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Operating condition3)
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Specification1)
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650...7502)
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2.0...3.4
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---
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---
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1)
The specifications must be attained when:
- engine runs at idling speed,
- the coolant temperature is at least 80 °C and
- electrical consumers are switched off
2)
Under the following conditions the idling speed is raised by the control unit:
- Battery voltage too low: up to 900 rpm
- After a long full throttle drive and at higher temperatures: up to 960 rpm
3)
Significance of numbers in 8 digit number block => Page 01-36
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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 5
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Display
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xxxx rpm
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xxx %
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x.xx
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x
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Indicated
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Engine speed
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Activated charcoal filter solenoid valve 1 duty cycle
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Activated charcoal filter solenoid valve 1 adaptation value
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Activated charcoal filter solenoid valve 1 flushing rate
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No specification for service departments
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Display group 6
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Display
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x.xx
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x.xx
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x.x V
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x.x V
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Indicated
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Mixture correction value
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Mixture correction "learned" value
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Throttle valve potentiometer voltage value for throttle valve opening
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Value stored during basic setting for the throttle valve potentiometer position: Throttle valve closed
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No specification for service departments
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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 7 = Display group 1
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Display group 8
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Display
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x.x V
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x.x V
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x.x V
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x.x V
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Indicated
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Actual value from throttle valve potentiometer
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Throttle valve emergency running profile
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Throttle valve control unit min. stop
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Throttle valve control unit max. stop
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No specification for service departments
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Display group 9
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Display
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x.xx
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x.xx
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x.xx V
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x.xx
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Indicated
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Lambda integrator
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Lambda adaptation
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Lambda adaptation
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Lambda adaptation
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No specification for service departments
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Significance of figures in 8 digit number block
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Significance 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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Adjustment conditions (display group 1)
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Operating condition (display group 4)
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1
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Fault in fault memory
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Overrun
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1
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Not relevant
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Idling speed
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1
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Not relevant
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Part load (throttle)
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1
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Idling switch open
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Full load
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1
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Fault in Lambda control
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Acceleration enrichment
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1
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Throttle valve open
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Weakening delayed
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1
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Speed above 2500 rpm
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Not relevant
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1
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Coolant temperature below 80 °C
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No. 1 cylinder recognized
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