Yanmar 6LY3 series Service Manual page 345

Troubleshooting by DTC Fault Codes
12/05
P0335/0 (Cam / Crank Speed Incompatibility)
DTC P0335/0
DTC Fault Code
DTC / FMI
1. Engine running
2. Difference between the cam and crank speed is more than 50 rpm
P0335/0
3. 0.5 seconds
4. PWR REDUCTION, CHECK ENGINE on the TELEFLEX display
Fail Mode
Limited Operation
Fail Release
Limited Operation Release
Remarks
Fault
DTC / FMI
1. Crank and cam speed sensor
(contaminants, wire harness, poor connection of connector, attachment)
P0335/0
2. Bad flywheel sensor
3. Electrical noise
Troubleshooting Procedure
1. Check the crank and cam speed if they are stable with a YDT.
If it is not stable, check the wire harness sensor, attachment and contaminants of the sensor core.
2. Check the status of flywheel sensor detection hole.
6LY3 Service Manual
Cam / Crank Speed Incompatibility
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
Engine will keep controlling the engine speed with the cam signal.
(ECU uses crank speed as normal condition.)
Engine cannot control the injection timer and have the failure code of the injection timer control
with the injection timing fully retarded.
Maximum engine speed is limited to 1800 rpm.
Yes
When the difference between cam and crank speed is within 15 rpm
Yes
After failure is cleared and also when the throttle position is at low idle position
White smoke or black smoke may increase more than usual because of the failure mode of the
injection timing control.
© 2007 Yanmar Marine International
Probable Cause
TROUBLESHOOTING
Check Point
Wire harness
Crank speed sensor
Cam speed sensor
13-55