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Motronic self-diagnosis
Display group overview
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Display group no.
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Indicated on display
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Designation
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00
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Read measured value block 0
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1 = Coolant temperature
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1 2 3 4 5 6 7 8 9 10
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2 = Engine load
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3 = Engine speed
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4 = Battery voltage
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5 = Throttle valve angle
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6 = Control value, idling air mass
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7 = Learned value, idling air mass
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8 = Control value for mixture formation (lambda control value)
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9 = Learned value for mixture formation (lambda learned value), additive
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10 = Learned value for mixture formation (lambda learned value), multiplicative
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01
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Read measured value block 1
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1 = Engine speed
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Basic
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1 2 3 4
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2 = Engine load
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function
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3 = Throttle valve angle
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4 = Ignition angle
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02
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Read measured value block 2
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1 = Engine speed
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Basic
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1 2 3 4
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2 = Engine load
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function
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3 = Injection period
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4 = Air mass
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Display group no.
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Indicated on display
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Designation
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03
Basic function
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Read measured value block 3
1 2 3 4
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1 = Engine speed
2 = Battery voltage
3 = Coolant temperature
4 = Intake air temperature
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04
Idling speed adjustment
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Read measured value block 4
1 2 3 4
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1 = Throttle valve angle
2 = Idling air mass, learned (no gear engaged on automatic)
3 = Idling air mass, learned, with gear engaged on automatic
4 = Operating status: Idling
Part throttle
Full throttle
Overrun
Enrichment
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05
Idling
stabilisation
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Read measured value block 5
1 2 3 4
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1 = Engine speed (actual)
2 = engine speed (specified)
3 = Idling speed control
4 = Air mass
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06
Idling
stabilisation
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Read measured value block 6
1 2 3 4
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1 = Engine speed
2 = Idling speed control
3 = Lambda control
4 = Ignition angle
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Display group no.
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Indicated on display
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Designation
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07
Lambda control and ACF system
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Read measured value block 7
1 2 3 4
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1 = Lambda control
2 = Lambda probe voltage
3 = Duty cycle, solenoid valve 1 for activated charcoal filter -N80
4 = Lambda correction factor with active tank breather
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08
Lambda
learned values
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Read measured value block 8
1 2 3 4
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1 = Injection period
2 = Lambda learned value at idling (additive)
3 = Lambda learned value at part throttle (multiplicative)
4 = Tank breather system: TB active (tank breather active)
Lambda adaptation (tank breather
not active)
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09
Lambda
learned values
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Read measured value block 9
1 2 3 4
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1 = Engine speed
2 = Lambda control
3 = Lambda probe voltage
4 = Lambda learned values at idling (additive)
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10
Tank
breather
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Read measured value block 10
1 2 3 4
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1 = Duty cycle, solenoid valve 1 for activated charcoal filter -N80
2 = Lambda correction factor with active tank breather
3 = Fill factor of activated charcoal filter -N80
4 = ACF purging quantity
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11
Fuel
consumption
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Read measured value block 11
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Vehicle speed
4 = Fuel consumption
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Display group no.
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Indicated on display
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Designation
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12
Fuel
consumption during idling
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Read measured value block 12
1 2 3 4
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1 = Engine speed
2 = Battery voltage
3 = Fuel consumption
4 = Ignition angle
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13
Knock-
control
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Read measured value block 13
1 2 3 4
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1 = Ignition timing retardation by knock control, cylinder 1
2 = Ignition timing retardation by knock control, cylinder 2
3 = Ignition timing retardation by knock control, cylinder 3
4 = Ignition timing retardation by knock control, cylinder 4
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14
Knock-
control
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Read measured value block 14
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Ignition timing retardation by knock control, cylinder 1
4 = Ignition timing retardation by knock control, cylinder 2
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15
Knock-
control
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Read measured value block 15
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Ignition timing retardation by knock control, cylinder 3
4 = Ignition timing retardation by knock control, cylinder 4
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16
Knock-
control
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Read measured value block 16
1 2 3 4
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1 = Knock sensor signal, cylinder 1
2 = Knock sensor signal, cylinder 2
3 = Knock sensor signal, cylinder 3
4 = Knock sensor signal, cylinder 4
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Display group no.
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Indicated on display
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Designation
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17
Catalytic converter-
warm-up and/or distributor basic
setting
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Read measured value block 17
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Energy balance for cat warm-up (ADR engine)
Position of Hall sender signal (ADP engine)
4 = Ignition angle
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18
Altitude
compensation
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Read measured value block 18
1 2 3 4
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1 = Engine speed
2 = Engine load without altitude compensation
3 = Engine load after altitude compensation
4 = Altitude correction factor
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19
Torque
reduction
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Read measured value block 19
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Retardation of ignition angle
4 = Ignition angle
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20
Operating
states
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Read measured value block 20
1 2 3 4
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1 = Engine speed
2 = Selector lever position
3 = Air conditioner/rear window
4 = A/C compressor
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21
Operating
states
Lambda
control
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Read measured value block 21
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Coolant temperature
4 = Lambda control ON/OFF
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Display group no.
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Indicated on display
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Designation
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22
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For development and production purposes only
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23
Adaptation
Throttle valve positioner
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Read measured value block 23
1 2 3 4
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1 = Learning demand display
2 = Min. stop of throttle valve positioner
3 = Emergency running stop of throttle valve positioner
4 = Max. stop of throttle valve positioner
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24
Knock
control
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Read measured value block 24
1 2 3 4
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1 = Engine speed
2 = Engine load
3 = Ignition angle
4 = Sum of ignition angle retardation for cylinders 1 to 4
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25
Boost pressure
control
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Read measured value block 25
1 2 3 4
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1 = Specified load without correction
2 = Specified load after correction
3 = Actual load
4 = Duty cycle, boost pressure control solenoid valve
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26
Idling air
demand
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Read measured value block 26
1 2 3 4
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1 = Idling speed control
2 = Idling air mass, learned (no gear engaged on automatic)
3 = Coolant temperature
4 = Engine speed
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27
Load reduction through knock control
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Read measured value block 27
1 2 3 4
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1 = Load reduction through knock control
2 = Engine load after reduction
3 = Engine speed
4 = Duty cycle, boost pressure control solenoid valve
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Display group no.
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Indicated on display
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Designation
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28...94
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Not used
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95...97
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For development and production purposes only
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98
Adaptation
Throttle valve control part
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Read measured value block 98
1 2 3 4
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1 = Voltage, throttle valve potentiometer
2 = Voltage, idling positioner potentiometer
3 = Operating status: idling/part throttle
4 = Adaptation status
Adaptation running, adaptation OK, adaptation ERROR
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99
Lambda
control
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Read measured value block 99
1 2 3 4
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1 = Engine speed
2 = Coolant temperature
3 = Lambda control
4 = Lambda control ON
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