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Evaluating measured value blocks, display groups 0...9 -Basic functions-
Evaluating measured value blocks, display groups 0...9 -Basic functions-
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Display group 1 -Basic functions-
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▪ Engine running at idling speed
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Read measured value block 1
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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xx.x °C
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x.x %
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Text
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Adjustment prerequisites for basic setting
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111111
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Lambda regulator before catalyst
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-10.0...10.0 %
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=> Page 01-93
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Coolant temperature
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85...110 °C
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=> Page 01-77
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Significance of 6 digit number block
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Significance if display = 1
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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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Significance
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1
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Coolant temperature exceeds 80 °C
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1
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Engine speed below 2000 rpm
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1
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Throttle valve closed
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1
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Lambda regulation OK
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1
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Idling switch closed
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1
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Air conditioner compressor switched off
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Evaluating display group 1, display zone 1 - Engine speed (idling speed)
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Appears on display
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Possible fault cause
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Fault elimination
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Less than 740 rpm
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- Throttle valve control part sticking or defective
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- Check throttle valve control part
=> Page 24-31
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- Perform idling check => Page 24-81
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More than 820 rpm
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- Idling switch not closed/defective
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- Interrogate fault memory, => Page 01-14
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- Large amount of unmetered air (cannot be compensated for by the idling stabilisation)
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- Check intake air system for leaks
=> Page 24-78
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- Throttle valve control part sticking/defective
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- Check throttle valve control part
=> Page 24-31
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- Perform idling check => Page 24-81
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Display group 2 -Basic functions- Air mass meter
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▪ Engine running at idling speed
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Read measured value block 2
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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xxx %
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x.x ms
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x.x g/s
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Air mass drawn in
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2.0...5.0 g/s
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=> Page 01-73
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Injection period
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2.0...5.5 ms
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=> Page 01-72
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Engine load
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15...35 %
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=> Page 01-82
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Evaluating display group 2, display zone 3 - Injection period
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Appears on display
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Possible fault cause
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Fault elimination
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Less than 2.0 ms
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- Large amount of fuel from the activated charcoal filter system
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- Check activated charcoal filter solenoid valve 1 => Page 01-41
, Final control diagnosis
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- Incorrect injectors with greater throughput installed
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- Check injection rate => Page 24-64
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Larger than 5.5 ms
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- Increased engine load due to electrical consumers, air conditioner, gear selected or P.A.S. on full lock
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- Eliminate increased load (air conditioner, power assisted steering etc.)
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Evaluating display group 2, display zone 4 - Air mass drawn in
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Appears on display
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Possible fault cause
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Fault elimination
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Less than 2.0 g/s
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- Large amount of unmetered air between intake manifold and air mass meter
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- Rectify unmetered air
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More than 5.0 g/s
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- Gear selected (automatic gearbox)
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- Place selector lever in P or N
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- Engine loaded due to ancillaries
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- Eliminate load (air conditioner, power assisted steering etc.)
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Note on display zone 4:
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◆ Displayed is the air mass measured by the air mass meter.
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◆ In emergency running caused by a fault on the throttle valve control part the engine runs without idling stabilisation at an increased idling speed (approx. 1000...1300 rpm) via the emergency running gap. In this case the air throughput is approx. 4.5...5.5 g/s.
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◆ The replacement value in g/s from throttle valve potentiometer will be displayed if the engine control unit detects a fault on the air mass meter.
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Display group 3 -Basic functions- Air mass meter
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▪ Engine running at idling speed
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Read measured value block 3
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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x.xx ms
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x <°
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xx.x°BTDC
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Ignition angle
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0...12 ° BTDC
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---
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Throttle valve angle
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0...6 <°
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=> Page 01-83
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Air mass drawn in
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2.0...5.0 g/s
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=> Page 01-73
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Note on display zone 3:
With the accelerator pedal floored the display value is approx. 80...90 <°.
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Display group 4 -Basic functions-
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▪ Engine running at idling speed
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Read measured value block 4
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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xx.xxx V
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xxx.x °C
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xxx.x °C
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Intake air temperature
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-45...108.5 °C
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Coolant temperature
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80...110 °C
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=> Page 01-77
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Engine control unit voltage supply
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12.0...14.5 V
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=> Page 01-76
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Note on display zone 3:
The engine control unit will use the intake air temperature as a replacement value for an engine start (start temperature - replacement value) as soon as there is a fault stored in the fault memory, which affects the coolant temperature sender (G62). The temperature then rises according to a model stored in the control unit. When the engine has reached normal working temperature a fixed replacement value will be displayed after a certain period. This fixed value is also dependent upon the intake air temperature.
Note on display zone 4:
The total temperature range is given as the specification. The displayed value must be above ambient temperature.
Evaluating display group 4, display zone 2 - Control unit voltage supply
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Appears on display
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Possible fault cause
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Fault elimination
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Less than 12.0 V
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- Alternator defective, battery charge state low
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- Check alternator and battery voltage, charge battery:
=> Binder Electrical system
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- Battery heavily loaded shortly after starting due to high charging current and current consumers
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- Increase revs slightly for a few minutes and switch off current consumers
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- Transfer resistance in the current supply or the engine control unit earth connection
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- Check engine control unit voltage supply => Page 24-109
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- Current draw when ignition is off
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- Eliminate current draw
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More than 14.5 V
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- Voltage regulator on alternator defective
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- Check voltage, replace regulator if necessary
=> Binder Electrical system
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- Excess voltage due to jump starting or quick charging unit
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- Interrogate fault memory => Page 01-14
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Evaluating display group 4, display zone 3 - Coolant temperature
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Appears on display
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Possible fault cause
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Fault elimination
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Less than 85 °C
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- Engine too cold
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- If necessary carry out test drive
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- Coolant temperature sender or wiring to engine control unit
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- Check coolant temperature sender
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Larger than 110 °C
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- Radiator soiled
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- Clean radiator
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- Radiator fan not functioning
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- Check function
=> Binder Electrical system
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- Thermostat defective
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- Check thermostat
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- Coolant temperature sender or wiring to engine control unit
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- Check coolant temperature sender
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Evaluating display group 4, display zone 4 - Intake air temperature
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Appears on display
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Possible fault cause
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Fault elimination
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Constant 19.5 °C
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- Fault recognised on intake air temperature sender -G42
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- Check intake air temperature sender
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- Intake air temperature sender -G42
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- Check intake air temperature sender
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Constant -46.5 °C
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- Wiring open circuit
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- Check intake air temperature sender
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141 °C (display appears only briefly and then jumps to
19.5 °C)
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- Short circuit between wires 1 and 3
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- Check intake air temperature sender
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Display group 5 -Basic functions-
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▪ Engine running at idling speed
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Read measured value block 5
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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xxx %
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xxx km/h
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Text
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Operating mode (idling, part throttle, full throttle, overrun)
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Idling
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---
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Road speed
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0 km/h
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---
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Engine load
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15...35 %
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=> Page 01-82
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Display group 6 -Basic function-
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▪ Engine running at idling speed
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Read measured value block 6
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⇒
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[ltrif ] Indicated on display
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xxxx rpm
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xxx %
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xxx.x °C
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xx.x %
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1
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2
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3
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4
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[ltrif ] Display zones
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Specification
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Evaluation
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Altitude correction factor
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---
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---
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Intake air temperature
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-45...108.5 °C
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=> Page 01-78
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Engine load
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15...35 %
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=> Page 01-82
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Engine speed (idling speed)
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740...820 rpm
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=> Page 01-71
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Note on display zone 3:
The total temperature range is given as the specification. The displayed value must be above ambient temperature.
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