ELECTRONIC FUEL INJECTION
5-107
IAT Replacement
1. Disconnect sensor from engine harness.
2. Remove the retaining ring and remove the sensor from the
intake boot.
3. Install new sensor.
CPS OPERATION OVERVIEW
The crankshaft position sensor is essential to engine operation,
constantly monitoring the rotational speed (RPM) and position
of the crankshaft.
A ferromagnetic 23-
tooth is mounted on the flywheel. During
rotation, an AC pulse is created within the sensor
passing tooth. The ECU calculates engine speed from
interval between the consecutive pulses.
The two-tooth gap creates an “interrupt” input signal,
corresponding to specific crankshaft position for PTO cylinder.
This signal serves as a reference for the control of ignition
timing by the ECU.
Synchronization of the CPS and crankshaft position takes
place during the first two revolutions each time the engine is
started. This sensor must be properly connected at all times. If
the sensor fails or becomes disconnected for any reason, the
engine will quit running.
CPS TEST
1. Disconnect CPS (5-wire) harness connector under storage
box of the vehicle located front the cylinder.
2. Connect an ohmmeter between the pin terminals leading
from the Blue and Green wires. A resistance value of
110~500Ω at room temperature (25℃ / 77℉) should be
obtained.
FUEL INJECTOR
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