4.15
Cleanfire Fuel Injection
4
Exhaust Temperature Sensor
Temperature / Air Pressure Sensor (TMAP)
Crankshaft Position Sensors (CPS)
The 5 tooth crank position sensor picks up all 5 flywheel
teeth and determines the following:
• Judge direction of rotation (forward and backward)
• Ignition advance angle control
• Injector drive angle control
• Excess advance ignition control at reverse
• MAG / PTO cylinder detection
The 2 tooth crank position sensor picks up 2 flywheel
teeth. It d
etects the crank angle and obtains minimal
information of the crank angle when control enters into
limp home mode
The sensors must be in the correct position or the engine
will not run. A
sheared flywheel key will cause the engine
to not start or to shut off (misfire).
Crankshaft Position Sensor Air Gaps
Hard engine starting, erratic reverse operation, and poor
engine performance can occur if the CPS air gap(s) are
outside specification.
NOTE: The sensor bases are not slotted. Only minor
def
lection adjustments can be made.
Air Gap Inspection/Adjustment
1. Rotate the crankshaft/flywheel so that an encoder rib
is
positioned directly underneath the sensor being
measured.
Sensor Specifications
Resistance
Values
2.3M @ 392°F (200°C)
76 @ 1652°F (900°C)
Exhaust Temperature Sensor Torque:
32 ft-lbs (44 Nm)
Sensor Specifications
Pins 1 to 2 (Temperature)
59°F (1
5°C) = 3000
68°F (20°C) = 2500
77°F (25°C) = 2000
Pins 1 to 4 (Pressure)
Pin
s 3 to 4 (Pressure)
2400 - 8200
3400 - 8200
Crankshaft Position Sensor Air Gap:
.020"-.030" (0.5-0.8mm)
TWO-TOOTH CPS
FIVE-TOOTH CPS
AIR GAP
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