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Operation Section
-74-
Table 2. MI-07 Diagnostic Fault Codes (Flash Codes) cont’d.
DFC
PROBABLE FAULT
FAULT ACTION *
CORRECTIVE ACTION
FIRST CHECK
715
LSDFault_CrankDisable
Crank Disable Fault, signal
has opened or shorted to
ground or power or defective
crank disable relay
None N/A
717
LSDFault_LockOff
Fuel lock off Valve Fault,
signal has opened or shorted
to ground or power or
defective Fuel lock off valve
TurnOnMil
Check fuel lock off valve for an open
wire or connector being disconnected
or signal shorted to GND
Lockoff Pin B (signal) to SECM Pin A11
Lockoff Pin A (power) to SECM (DRVP)
Pin A23
Check CSV for an open coil by
disconnecting the CSV connector and
measuring the resistance (~26
Ω
± 3
Ω
)
718
LSDFault_MIL
Malfunction Indicator Lamp
Fault, signal has opened or
shorted to ground or power
or defective MIL lamp
None
Check MIL lamp for an open wire or
short to GND.
721
(72)
GasFuelAdaptRangeLo
In LPG mode, system had to
adapt rich more than
expected
TurnOnMil
Check for vacuum leaks.
Check fuel trim valves, e.g. leaking
valve or hose
Check for missing orifice(s).
731
(73)
GasFuelAdaptRangeHi
In LPG mode, system had to
adapt lean more than
expected
TurnOnMil
Check fuel trim valves, e.g. plugged
valve or hose.
Check for plugged orifice(s).
741
(74)
GasO2NotActive
Pre-catalyst O2 sensor
inactive on LPG, open O2
sensor signal or heater
leads, defective O2 sensor
(1) TurnOnMil
(2) DisableGas O2Ctrl
Check that Pre-catalyst O2 sensor
connections are OK.
O2 (signal) Pin 3 to SECM Pin B13
O2 Pin 2 (HEATER GND) to SECM
(DRVG GNG) Pins A16, B17
O2 Pin 1 (HEATER PWR) to SECM
(DRVP + 12V) Pin A23
Verify O2 sensor heater circuit is
operating by measuring heater
resistance
(2.1
Ω
± 0.4
Ω
)
O2 Pin 2 (HEATER GND) to Pin 1
(HEATER PWR)
(*) Fault actions shown are default values specified by the OEM.
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