Evaluating Measured Value Blocks At Idle
Display group 000 at idle with engine warm, coolant temperature not below 80 °C (176 °F)
Display group 001 at idle with engine warm, coolant temperature not below 80 °C (176 °F)
Evaluation: Injected quantity display
Evaluation: Modulating piston displacement sensor voltage display
Display group 002 at idle with engine warm, coolant temperature not below 80 °C (176 °F)
Evaluation: "Throttle position" display
Evaluation: "Operating condition" display
Significance of figures in 3-digit number block for engine operating condition:
Display group 003 at idle with engine warm, coolant temperature not below 80 °C (176 °F)
Evaluation: Air mass drawn in (specified) display
Evaluation: Air mass drawn in (actual) display
Display group 004 at idle with engine warm, coolant temperature not below 80 °C (176 °F)
Evaluation: Start of injection (specified) display
Evaluation: Start of injection display (actual)
Display group 005
The values displayed are not useful for service department troubleshooting.
Display group 006 with ignition switched on
Evaluation: Brake pedal monitor display
Significance of figures in 3-digit number block for brake pedal monitor:
Evaluation: Cruise control system display
Significance of figures in 6-digit block for cruise control system:
Display group 007 with ignition switched on (engine cold and not running)
Evaluation: Fuel temperature display
Evaluation: Intake Air Temperature display
Evaluation: Coolant temperature display
Display group 009
The values displayed are not useful for service department troubleshooting.
Display group 012
The values displayed are not useful for service department troubleshooting.
Display group 013 at idle speed with engine warm, coolant temperature not below 80 °C (176 °F)
Evaluation: idle speed smooth running control display
- The fuel injection system is equipped with an idle speed smooth running control. There may be power differences between the individual cylinders (component tolerances, jet sizes, compressions etc.) which are recognized and equalized via selective injected quantities.
- Recognition at idle speed is via the signal from the Engine Speed Sensor -G28- which delivers four signals per crankshaft revolution to the Engine Control Module (ECM). If the signals are delivered at the same rhythm then all cylinders work the same. If one cylinder is weaker the crankshaft takes longer for the next half revolution. Conversely a more powerful cylinder accelerates the crankshaft so less time is taken.
- If the ECM recognizes a difference, then the relevant cylinder is given more or less fuel, until the engine runs evenly again.
- +... mg/H: The relevant cylinder is less powerful than No.3 cylinder and is therefore supplied with more fuel.
- -... mg/H: The relevant cylinder is more powerful than No.3 cylinder and is therefore supplied with less fuel.
Display group 015
The values displayed are not useful for service department troubleshooting.
Display group 016 at idle
Evaluation: Additional heater display
Significance of figures in 8-digit number block for additional heater:
Evaluation: Heater element activation display
Significance of figures in 2-digit number block for heater element activation:
Display group 19 with ignition on
Evaluation: Modulating piston displacement sensor voltage display (start/stop)
