Operation Section
-110-
Table a. MI-04 Diagnostic Fault Codes (Flash Codes)
DFC
Probable Fault
Action
Corrective Action, First Check
65 Pedal2SensorInputLo
APP2 sensor failure or shorted circuit
MIN power Limit
Check foot pedal connector
66 Pedal2SensorInputHi
APP2 signal disconnected, open
circuit or sensor malfunction
(Expected faults when APP
connector is unplugged
CODES: 61 & 66)
MIN power Limit
Check foot pedal connector
67 Pedal2SensorRangeLo
APP2 potentiometer malfunction.
Improper APP2 reading may be due
to dirt or oxidation on the sensor
traces.
Stored Fault Code
(MIL Only)
Check foot pedal connector
68 Pedal2SensorRangeHi
APP2 potentiometer malfunction.
Improper APP2 reading may be due
to dirt or oxidation on the sensor
traces.
Stored Fault Code
(MIL Only)
Check foot pedal connector
69 Pedal1ToPedal2Difference
Measured APP2 pedal position
signal is different than APP1 signal
MIN power Limit
Check foot pedal connector
71 AFRTrimValveOutput
FTV modulation driver signal fault
Stored Fault Code
(MIL, Disable
Adaptive learns)
Check FTV for an open wire or FTV
connector being disconnected
72 AFRTrimValveLowerDC
FTV duty cycle at lower (lean) limit
Stored Fault Code
(MIL, Disable
Adaptive learns)
Engine measured Air/Fuel ratio at the
O2 sensor is excessively lean.
If LP-Gas fuel in LP tank is not
enough, this fault code can be set. If
LP tank is frozen, this fault code can
be set, too. It is not system trouble.
z
Check for intake manifold
leaks
z
Check balance line (vacuum
hose) connection at the
regulator
z
Check N-CA55-500-TR mixer
for heavy end build-up and
operation (see mixer section)
z
Check N2001 secondary for
operation or low primary
pressure (see N2001
Regulator section)
