Fuel Injection System
8.40
Engine Monitoring
This screen displays the following information:
S Run Time: This field displays the total time the engine has been operated in hours, minutes, and
seconds. Tether-on/Engine-off does not accumulate time on this counter.
S EMM On Time: This field displays a count in hours, minutes, and seconds. It’s reset to zero each
time the EMM is “powered-up”. The EMM “powers-up” when the tether cord is installed and the en-
gine is running, or when the the DIt EMM Service Power Connector is installed, starting the counter.
SENSORS
S Air: Displays air temperature under the engine cover in volts, degrees F, and degrees C. Unplug the
sensor to see this value go to maximum high. Jump the sensor leads together to see the value go to
maximum low. When operating correctly, voltage and temperature increase or decrease together.
NOTE: V o ltage values for the sensors reflect the voltage at the analog to digital converter inside the
EMM. Voltages measured at the sensor will be substantially different.
S Water: Displays engine water temperature in volts, degrees F and degrees C. Unplug sensor to see
this value go to maximum high. Jump sensor leads together to see the value go to maximum low.
When operating correctly, voltage and temperature increase or decrease together. Use this data to
verify S.L.O.W.t or overheat warnings.
S EMM: Displays temperature of injector driver circuits inside the EMM in volts, degrees F, and de-
grees C. You cannot manually alter this sensor reading.
S TPS Cal: Shows sensor value in percent of throttle plate opening. Slowly move the throttle lever
and watch this value change. Value should progressively increase and decrease from 0% (idle) to
approximately 85% (WOT), without gaps (large jumps) or plateaus (flat spots).
S TPS Act: Shows sensor voltage in relation to throttle plate opening. Slowly move the throttle lever
and watch this value change. Value should progressively increase and decrease.
SWITCHES
S In S.L.O.W.: Warns user the RPM limiting trouble codes have been set and must be cleared.
S In SYNCH: Indicates that the EMM is reading the signal from the CPS and the EMM is process-
ing the signal and firing the injectors and ignition coils.
NOTE: Synchronization between the sensors and the EMM only means that a signal is being produced, and the
EMM is receiving and processing the signal. It does not mean that the EMM is processing the signal at the right
time, i.e. a sheared flywheel key would advance or retard the timing signal from the CPS.
ENGINE MONITORINGRun Time: 12:58:25
EMM On Time: 0:0:46
SENSORS
RESULTS
VOLTS °F °C %OPEN
AIR
WATER
EMM
TPS CAL.
TPS ACT.
ENGINE SPEED
IGNITION TIMING
SPARK DURATION
FUEL TIMING
FUEL PULSE WIDTH
BARO PRESSURE
1.90
2.47
1.25
-
0.33
71
134
100
-
--
-
-
-
-
-
22
57
38
680
RPM
1
ms
5.00
ms
11 °BTDC
5.33
ms
29.61 In HG
0
SWITCHES
VOLTAGES
In S.L.O.W.t
NO
ALTERNATOR 12.8
In Synch.
YES
ENGINE SYNC NO
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