Yanmar 6LY3 series Service Manual page 351

Troubleshooting by DTC Fault Codes
12/05
DTC Fault Code
DTC / FMI
1. Key switch ON
2. Input signal voltage is above 3.6V
P0520/3
3. 0.5 seconds
4. CHECK ENGINE on the TELEFLEX display
1. Key switch ON
2. Input signal voltage is below 0.2V
P0520/4
3. 0.5 seconds
4. CHECK ENGINE on the TELEFLEX display
Fail Mode —
Limited Operation
No limited operation
Yes
Fail Release
When the input signal voltage goes to normal range (0.2 - 3.6V)
Oil pressure is monitored for engine diagnosis use only.
Sensor supply voltage must be kept below 6V. Once the sensor supply voltage exceeds 6V, sensor
Remarks
damage occurs. Replace the pressure sensor. To check if the voltage has been exceeded, check the
status of DTC 1230/0.
Fault
DTC / FMI
1. SIGNAL wire harness short to high voltage over 5V
P0520/3 2. Sensor ground wire harness for the oil pressure sensor open
3. Sensor malfunction
1. SIGNAL wire harness open or short to ground
P0520/4 2. 5V sensor wire harness open
3. Sensor malfunction
Troubleshooting Procedure
See Troubleshooting the Pressure Sensor on page 13-77.
6LY3 Service Manual
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
© 2007 Yanmar Marine International
Probable Cause
TROUBLESHOOTING
Check Point
Wire harness
Sensor
Wire harness
Sensor
13-61