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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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98...84
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600...700 rpm1)
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Injection period
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5...10
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2.56...5.12 ms
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Throttle valve potentiometer voltage
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24...46
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4.53...4.10 V
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Not relevant
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---
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---
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Not relevant
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---
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---
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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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Intake manifold pressure
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45...84
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300...480 mbar
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Coolant temperature
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37...18
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80...110 °C
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Battery voltage
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171...226
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11.0...14.5 V
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Intake air temperature
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156...35
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15...80 °C
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1)
Up-to-date specifications:
=> Exhaust emissions test binder
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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 conditions4)
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Specification1)
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600...7002)3)
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80...110
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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.xx 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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600...7002)3)
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2.56...5.12
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11.0...14.5 V
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15...80
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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)
The control unit increases idling speed under following conditions:
- When the battery voltage is too low: up to 900 rpm
- After a long full throttle drive and higher temperatures: up to 960 rpm
3)
Up-to-date specifications:
=> Exhaust emissions test binder
4)
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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xxx %
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xx <°
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xx.x %
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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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Position of throttle valve by throttle valve positioner
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Specification1)
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600...7002)3)
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18...28
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9...18
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17...29
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Display group 4
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Display
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xxxx rpm
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xxx %
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xxx
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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 signal
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Operating condition4)
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Specification1)
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600...7002)3)
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18...28
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255
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01000000
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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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Indicated
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Engine speed
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Duty cycle solenoid valve 1 for activated charcoal filter
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---
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---
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Specification1)
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600...7002)3)
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6...19
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---
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---
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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 6
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Display
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xxx
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xxx
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xxx
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xxx
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Indicated
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Mixture correction value
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Learning value for mixture correction
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Learning value for idling stabilization by throttle valve positioner
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The stored value of "Basic setting" for throttle valve potentiometer position: Throttle valve closed
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Specification
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Fluctuating around 128
Tolerance range 85...160
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Not for service
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Not for service
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20...30
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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)
The control unit increases idling speed under following conditions:
- When the battery voltage is too low: up to 900 rpm
- After a long full throttle drive and higher temperatures: up to 960 rpm
3)
Up-to-date specifications:
=> Exhaust emissions test binder
4)
Significance of numbers in 8 digit number block => Page 01-35
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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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Not relevant
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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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Air conditioner compressor switched on
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Part load
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1
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Idling switch open1)
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Full load
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1
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Fault in the Lambda control2)
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Not relevant
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1
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Throttle valve opened
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Not relevant
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1
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Speed above 2000 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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Not relevant
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1)
The problem may be: e.g. the accelerator cable is set too tight.
2)
Self-diagnosis will not register all faults. If a 1 is displayed even when no faults are stored, check Lambda probe and Lambda control
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