LeeBoy 8608 - Page 149

SPN FMI DTC SYMPTOM/CAUSE RECOVERY FROM ERROR
172 0
Intake air temperature:
High
Intake air temperature higher than
140° F (60° C).
Key switch turn OFF.
172 3
Intake air temperature
error: High
Open circuit or +B short circuit of sen-
sor/harness. Intake air temperature
sensor is 4.9V or above.
Diagnostic counter = zero
(White smoke increases at low tem-
perature.)
172 4
Intake air temperature
error: Low
Ground short circuit of sensor/har-
ness. Intake air temperature sensor is
0.05V or less.
Diagnostic counter = zero
(White smoke increases at low tem-
perature.)
174 0 Fuel temperature high.
Fuel temperature higher than 194° F
(90° C).
Diagnostic counter = zero
174 3
Fuel temperature sensor:
High
Open circuit or +B short circuit of
sensor/harness. Voltage of tempera-
ture sensor in supply pump is 4.9V or
above.
Diagnostic counter = zero
174 4
Fuel temperature sensor:
Low
Ground short circuit of sensor/har-
ness. Voltage of temperature sensor
in supply pump is 0.1V or less.
Diagnostic counter = zero
190 0 Engine speed.
Engine speed exceeds threshold
speed. Engine speed ≥ 3500 min-1
(rpm).
Diagnostic counter = zero
628 2 Program memory. Check-Sum error.
Key switch turn OFF.
Engine stopped without delay.
633 7
Pressure limiter emer-
gency open.
Combination of fuel leak and one of
conditions below:
1. Rail pressure exceeds 191MPa
(27700 psi or 1950 kgf/cm
2
).
2. Within one second after the rail
pressure goes below temperature in
#1, it increases above.
Key switch turn OFF.
EGR stop.
(Engine speed may go down due to
lack of fuel pressure.)
636 2
Crank position sensor
pulse number error.
Open circuit or short circuit of sensor/
harness. Failure of sensor. Pulse
rotation is not 56 teeth. Faulty starting.
Engine vibration increases slightly.
Diagnostic counter = zero
636 7
NE-G phase shift.
NE: Crankshaft position
sensor.
G: Camshaft position
sensor.
Large phase shift between NE and G
pulses within +/- 15 degrees. Engine
hesitates at start-up.
Diagnostic counter = zero
636 8
No input of NE sensor
pulse.
Open circuit or short circuit of sen-
sor/harness. Failure of sensor. No
recognition of NE sensor pulse. Faulty
starting. Engine vibration increases
slightly.
Diagnostic counter = zero
651 3
Open circuit of harness/
coil in 1st cylinder injector.
Open circuit of harness or injector coil.
Engine vibration increases. Injectors
that have no error are operated.
Key switch turn OFF.
652 3
Open circuit of harness/
coil in 2nd cylinder injec-
tor.
Open circuit of harness or injector coil.
Engine vibration increases. Injectors
that have no error are operated.
Key switch turn OFF.
55
Maintenance
LeeBoy 8608 Commercial Paver 5-57