Diagnosis Procedure By Dtc; Crank/Cam Sensors; Dtc 16-Crank And/Or Cam Could Not Synchronize During Start - Kubota WG1605-E3 Diagnostic Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
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Diagnosis Procedure by DTC

(1) Crank/Cam Sensors (DTC 16, 336, 337, 341, 342)

DTC 16-Crank and/or Cam Could Not Synchronize During Start

• Hardware: Crankshaft Position Sensor/Camshaft Position Sensor Input Circuits
• Enabling Conditions: Engine Cranking or Running
• Set Conditions: Engine cranking longer than 4 revolutions above 90 min
synchronization
• Corrective Action(s): Illuminate MIL and/or sound audible warning or illuminate secondary warning lamp
• Emissions related fault
• Possible causes: Mechanical misalignment between cam and crank, CMP or CKP signal (+)/ground () wires
misplaced in connectors, bad ECM
The crankshaft position sensor is a magnetic pick-up sensor installed in the engine block adjacent to a "coded"
trigger wheel located on the flywheel. The sensor-trigger wheel combination is used to determine crankshaft position
(with respect to TDC cylinder #1 compression) and the rotational engine speed. Determination of the crankshaft
position and speed is necessary to properly activate the ignition, fuel injection, and throttle governing systems for
precise engine control.
The camshaft position sensor is a magnetic pick-up sensor installed in the engine block or valve train adjacent to
a "coded" trigger wheel located on or off of the camshaft. The sensor-trigger wheel combination is used to determine
cam position (with respect to TDC cylinder #1 compression). Determination of the camshaft position is necessary to
identify the stroke (or cycle) of the engine to properly activate the fuel injection system and ignition (for coil-on-plug
engines) for precise engine control.
Typically, this fault will result in an engine that will not start or run.
DTC 16-Crank and/or Cam Could Not Synchronize During Start
Diagnostic Aids
• If there are any other CMP or CKP DTC's, diagnose them first
• Ensure that all 3 terminals are in the correct slot in the connector for both the CMP and the CKP sensors
• Ensure that the cam and crank are properly installed and timed
• Check that crankshaft and/or camshaft position sensor(s) is/are securely connected to harness
• Check that crankshaft and/or camshaft position sensor(s) is/are securely installed into engine block
• Check crankshaft and/or camshaft position sensor(s) circuit(s) wiring for open circuit
• Connect a 2 channel oscilloscope, scope CMP and CKP inputs and compare to known good waveforms
-1
1-123
ECM SYSTEM
(rpm) without crank and/or cam
KiSC issued 12, 2016 A