G420E/G424E
Tier
LP Engine
Advanced Diagnostics
47
IATSensorInputHigh:
(Intake Air Temperature
Sensor Input is High) normally set if the TMAP
temperature signal wire has become disconnected or
the circuit is open to the SECM.
EST1Low:
(Electronic Spark Trigger)
is a current
driver signal and normally set if the signal from the
SECM is shorted to ground.
EST1High:
(Electronic Spark Trigger)
is a current
driver signal and normally set if the signal from the
SECM is open or lost.
LowOilPressure:
(Low Oil Pressure) the oil pressure
switch has opened or become disconnected, normally
indicating a low oil condition in the engine.
BatterySensorInputLow:
(Battery Voltage Sensor
Input is Low) normally set if the power to the SECM
drops below 8.5 VDC.
BatterySensorInputHigh:
(Battery Voltage Sensor
Input is High) normally set if the power to the SECM
increases above 15.9 VDC.
XDRPSensorInputLow:
(Transducer Voltage Sensor
Input is Low) normally set if the sensor power from
the SECM drops below 4.8 VDC.
XDRPSensorInputHigh:
(Transducer Voltage Sensor
Input is High) normally set if the sensor power from
the SECM increases above 5.9 VDC.
EngineOverspeed:
(Engine Over speed) is set when
the engine RPM increases above the SECM
maximum governing RPM. Typically this is in
association with one or more throttle faults. This
fault can be set without additional throttle faults if the
operator motors the lift truck down a steep grade (hill).
Pedal1SensorInputLo:
(Accelerator Pedal Position 1
Sensor Input is Low) normally set if the APP1 signal
wire has become disconnected or the circuit is open
to the SECM.
Pedal1SensorInputHi:
(Accelerator Pedal Position 1
Sensor Input is High) normally set if the APP1 signal
wire has become shorted to APP power, APP1 has
failed or the SECM has failed.
Pedal1SensorRangeLo:
(Accelerator Pedal Position
1 Sensor Range is Low) the APP1 potentiometer has
malfunctioned. An improper APP1 reading may be
due to dirt or oxidation on the sensor traces.
Pedal1SensorRangeHi:
(Accelerator Pedal Position
1 Sensor Range is High) the APP1 potentiometer has
malfunctioned. An improper APP1 reading may be
due to dirt or oxidation on the sensor traces.
Pedal2SensorInputLo:
(Accelerator Pedal Position 2
Sensor Input is Low) normally set if the APP2 signal
wire has become shorted to APP power, APP2 has
failed or the SECM has failed.
Pedal2SensorInputHi:
(Accelerator Pedal Position 2
Sensor Input is High) normally set if the APP2 signal
wire has become disconnected or the circuit is open
to the SECM.
Pedal2SensorRangeLo:
(Accelerator Pedal Position
2 Sensor Range is Low) the APP2 potentiometer has
malfunctioned. An improper APP2 reading may be
due to dirt or oxidation on the sensor traces.
Pedal2SensorRangeHigh:
(Accelerator Pedal
Position 2 Sensor Range is Low) the APP2
potentiometer has malfunctioned. An improper APP2
reading may be due to dirt or oxidation on the sensor
traces.
Pedal1ToPedal2Difference:
(Accelerator Pedal
Position Sensor 1 and Accelerator Pedal Position
Sensor 2 are Different) normally set when APP1
measured pedal position is different from APP2
measured pedal position.
AFRTrimValveOutput:
(Air Fuel Ratio Trim Valve
(FTV) Driver) is normally set when the FTV driver
signal is open due to the connector becoming
disconnected.
AFRTrimValveLowerDC:
(Air Fuel Ratio Trim Valve
(FTV) Lower Duty Cycle) normally set when the duty
cycle of the FTV reaches the minimum limit (running
too lean).
AFRTrimValveUpperDC:
(Air Fuel Ratio Trim Valve
(FTV) Upper Duty Cycle) normally set when the duty
cycle of the FTV reaches the maximum limit (running
too rich).
O2SensorSwitching:
(Oxygen Sensor Switching)
is set when the O2 sensor can no longer switch or be
driven above and below 500mv by the SECM.
OxygenSensorInputHigh:
(Oxygen Sensor Input is
High)
OxygenSensorInputLow:
(Oxygen Sensor Input is
Low)
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Страница 61: ...G420E G424E Tier LP Engine Electrical Connections 60 CHAPTER 6 MI 04 ELECTRICAL CONNECTIONS Figure E1...
