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WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
[4] DIAGNOSTIC TESTS
The GCP engine control module for spark-ignited
engine applications incorporates a set of four (4)
diagnostic tests that perform specific functions used as
an aid for verifying proper engine control. This section
describes the tests supported, test states, and operating
criteria for each test.
Diagnostic tests is software which can be initiated via
CAN using CCP.
Spark Kill Test
"Coil X" disables individual cylinders at any operating
condition for the duration defined in calibration or until
released through software. 'Spark Kill' may be used in
conjunction with 'Injector Kill' to disable two cylinders at
any given time. Upon a state change from one cylinder
to another, the test sequence will automatically
re-enable the first coil prior to disabling the selected coil.
This test reverts to normal operation if "Normal" state is
selected, ignition voltage is cycled from high to low, or
the calibrated time-out expires.
NOTE
• This test should not be initiated prior to the
"Injector Kill" test when the engine is attached
with a catalyst. If performed while the injector for
the selected cylinder is firing, raw-unburned fuel
and air will be present in the exhaust and will
react in the catalyst resulting in extremely high
catalyst substrate temperatures which can
cause wash coat or substrate damage and
failure.
States
1) Normal: State of normal operation
2) Coil 1: Disables coil or spark for cylinder 1 in block
order
3) Coil 2: Disables coil or spark for cylinder 2 in block
order
4) Coil 3: Disables coil or spark for cylinder 3 in block
order
5) Coil 4: Disables coil or spark for cylinder 4 in block
order
Monitored Status
1) Test not started
2) Test is running
3) Test finished (time-out achieved)
8) Cannot start test
Injector Kill Test
"Inj X" disables individual cylinders at any operating
condition for the duration defined in calibration or until
released through software. 'Injector Kill' may be used in
conjunction with 'Spark Kill' to disable two cylinders at
any given time. Upon a state change from one cylinder
to another, the test sequence will automatically
re-enable the first injector prior to disabling the selected
injector. Reverts to normal operation if "Normal" state is
selected, ignition voltage is cycled from high to low, or
the calibrated time-out expires.
NOTE
• This test should not be initiated at high loads or
for more than five (5) seconds if the engine is
attached with a catalyst. If done so, a large
quantity
of
oxygen
reactions in the catalyst resulting in extremely
high catalyst substrate temperatures which can
cause wash coat or substrate damage and
failure.
States
1) Normal: State of normal operation
2) Inj 1: Disables injector 1 in block order
3) Inj 2: Disables injector 2 in block order
4) Inj 3: Disables injector 3 in block order
5) Inj 4: Disables injector 4 in block order
Monitored Status
1) Test not started
2) Test is running
3) Test finished (time-out achieved)
8) Cannot start test
DBW Test
Permits full-authority operation of an electronic
throttle via the throttle command input while the engine
is in the "Stopped" state only. Reverts to normal
operation if "Off" state is selected, ignition voltage is lost,
or engine speed is sensed.
NOTE
• Ensure
that
sensor/electronic throttle control input is at 0 %
or idle prior to starting/operating the engine.
While this test mode will revert to disabled when
engine speed is sensed, the throttle command
will follow the FPP % commanded by the sensor
causing the engine to accelerate.
States
1) Off: State of normal operation
2) Enabled: Enables full authority control of an
electronic throttle
Monitored Status
1) Test not started
2) Test is running
3) Test finished
8) Cannot start test (speed is sensed)
1-38
ECM SYSTEM
will
fuel
undesirable
the
foot
pedal
position
KiSC issued 12, 2016 A
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