Specifications

61
Data Parameters Engine Parameters
center. Rather, it indicates the number of degrees of advance subtracted per cylinder until
detonation stops.
KNOCK SENSOR
KNOCK SENSOR SIGNALS
KNOCK SENSOR CYLINDER 1 to 4
KNOCK SENSOR FRONT
KNOCK SENSOR LEFT
KNOCK SENSOR LEFT FRONT
KNOCK SENSOR LEFT REAR
KNOCK SENSOR REAR
KNOCK SENSOR RIGHT
KNOCK SENSOR RIGHT FRONT
KNOCK SENSOR RIGHT REAR
Range: ________________________________________________________ 0 to 5.00 V
KNOCK SIGNAL
KNOCK SENSOR EVALUATION
Range: __________________________________________________________ YES/NO
Used on DM, ME10, ME20, ME27, ME28 and SIM4 systems. These parameters indicate the
signal voltage provided to the ECU by the indicated knock sensor (KS). The display reads 0.0 V
when no detonation is detected by the KS. Voltages greater than 0.0 V indicate detonation. As
voltage increases, so does the intensity of the detonation.
LAMBDA CONTROL ACTIVE
Range: __________________________________________________________ YES/NO
Used on ME27, and SIM4 systems. This parameter indicates whether the oxygen sensor and
lambda fuel control circuit is currently adjusting the fuel mixture (closed loop). When this
parameter displays YES, the ECU is in closed loop operation.
LAMBDA, UPSTREAM CAT, CYL 1 to 12
LAMBDA, UPSTREAM CAT, LEFT
LAMBDA, UPSTREAM CAT, RIGHT
Range: ______________________________________________________0.750 to 1.250
Used on ME27 and ME28 systems. The “1 to 12" in a parameter name represent twelve
separate parameters, one for each cylinder. These parameters indicate the short-term fuel trim
(STFT) control factor which attempts to maintain a 14.7 to 1, or 1.0 Lambda, air-fuel ratio based
on the oxygen sensor output. On the display, a 1.0 Lambda reading is the base adjustment or
neutral starting point. Readings over 1.0 Lambda represent a lean condition with a rich
correction, or increased injector time. Readings lower than 1.0 Lambda represent a rich condition
with a lean correction, or reduced injector time.
LE ACTUATOR ACT.VALUE POT.MTR R1
LE ACTUATOR ACT.VALUE POT.MTR R2
Range: ________________________________________________________ 0 to 5.00 V
Used on ME10 systems. These parameters indicate the signal provided to the ECU by the
electronic actuator control potentiometer sensors (R1 and R2). These parameters are used on
drive-by-wire systems that do not have a mechanical throttle linkage. An electronic actuator
controls the throttle valve under different operating conditions to regulate idle speed, cruise
control operation, driving on the basis of accelerator position, traction control (Acceleration Slip
Regulation), the Electronic Stability Program (ESP), and emergency running. Accelerator pedal
position is detected by two potentiometers that transmit input signals to the ECU. Based on these
signals, the ECU controls the throttle actuator. One potentiometer is the pedal value sensor and
the other is the electronic actuator. The throttle actuator supplies a reference value for a
plausibility check. If one potentiometer fails, the system switches over to the other one. A quick