Specifications

60
Data Parameters Engine Parameters
IRREGULAR RUNNING SHUTOFF VALUE
Range: __________________________________________________________ variable
Used on ME27 and ME28 systems. The ECU computes this time variable for different RPM/load
ranges as an indicator of engine smoothness based on crankshaft sensor input. The ECU
calculates this time variable either once per second (1/s) or twice per second (1/s2). If engine
smoothness deteriorates, this number increases. At a certain threshold value, misfiring
cylinder(s) are shutoff. Compare this value with data parameters SMOOTH RUNNING OF CYL.
XX and MISFIRE FAULT COUNTER CYLINDER XX to diagnose specific problem cylinder(s).
IRREGULAR RUNNING SHUTOFF VALUE
IRREGULAR RUNNING
Range: ______________________________________________________ not available
Use on SIM4 systems. The ECU computes this millisecond (ms) time variable for different engine
speed and load ranges as an indicator of engine smoothness based on crankshaft sensor input.
Irregular Running displays the actual live reading, while the Shutoff Value displays the shutoff
threshold. If engine smoothness deteriorates, this number increases. At a certain threshold
value, misfiring cylinder(s) are shutoff. Compare this value with data parameters SMOOTH
RUNNING OF CYL. XX and MISFIRE FAULT COUNTER CYLINDER XX to diagnose specific
problem cylinder(s).
KICKDOWN
KICKDOWN SWITCH
Range: __________________________________________________________ ON/OFF
Used on EAG, EGS, ME27 and ME28 systems. These automatic transmission system
parameters indicate whether the kickdown switch has been activated.
KNOCK CONTROL
KNOCK CONTROL LEFT
KNOCK CONTROL RIGHT
Range: _______________________________________________ ENABLED/DISABLED
KNOCK CONTROL ACTIVE
Range: __________________________________________________________ ON/OFF
Used on EZ, ME27, ME28 and SIM4 systems. These parameters indicate whether the knock
control and ignition spark retard systems are active in preventing engine detonation. The reading
is based on the ECU input signal from the knock sensor (KS). The display reads ENABLED or
ON when the ECU is retarding spark to prevent detonation, and reads DISABLED or OFF when
no detonation is detected.
KNOCK CONTROL APPROVAL
Range: __________________________________________________________ YES/NO
Used on HFM, ME10 and ME20 systems. This parameter indicates whether the ECU is allowing
knock control, which retards ignition spark to prevent engine detonation when predetermined
conditions are met. The display reads YES when conditions are met and the ECU is allowing
spark retard to prevent detonation, and reads NO when conditions to enable knock control have
not been met. In this case, the ECU does not adjust spark timing to control detected detonation.
KNOCK IGNITION ANGLE CYL. 1 to 8
KNOCK IGNITION ANGLE CYL. 1 to 12
Range: ___________________________________________________________0 to 60°
Used on EZ, HFM, ME10, ME20, ME27, ME28 and SIM4 systems. The “1 to 8" and “1 to 12" in
the parameter names represent up to twelve separate parameters, one for each cylinder. These
parameters indicate the amount of spark advance, in degrees, removed by the ECU when the
knock sensor (KS) senses detonation. Timing is retarded from the optimal advance for existing
speed and load. Knock ignition angle does not indicate that timing is retarded after top dead