DSG-423 ENGINE CONTROLS
08-34
Injector Test
The Injector Kill mode is used to disable individual fuel
injectors. If the Injector Kill mode is selected with the
engine running below 1000 RPM, the minimum throttle
command will lock into the position it was in when the
test mode was entered. If the Injector Kill mode is
selected with the engine running above 1000 RPM, the
throttle will continue to operate normally.
Disabling Injectors
To disable an injector, use the mouse to select the
desired injector. The word “Normal” will change to the
Injector you have selected. The injector driver can be
re-enabled by selecting again. If the engine is running
below 1000 RPM, the injector driver will stay disabled
for 15 seconds and then re-set. If the engine is running
above 1000 RPM, the injector driver will stay disabled
for 5 seconds and then re-set. Record the change in
rpm or closed loop multiplier while each driver is
disabled.
Throttle Test
To select this test mode the engine must be off, but the
key must be in the ON position.
The DBW Test mode allows the technician to control the
throttle directly (without the engine running) with the foot
pedal or entering a number into the “TPS Command”
box. It is used during the diagnostic routines specified
for FPP and TPS related faults.
FPP position displays the current position of the foot
pedal as a percentage. FPP volts display the voltage
that the GCP is reading from the FPP sensor.
TPS Command displays the commanded throttle
position expressed as a percentage, which is being sent
to the throttle. TPS Position is the actual percent of
throttle opening being sent to the GCP from the throttle.
TPS volts display the actual TPS signal voltage the
GCP is receiving from the throttle.
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