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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