Yanmar 6LY3 series Service Manual page 325

Troubleshooting by DTC Fault Codes
12/05
DTC Fault Code
DTC / FMI
1. Key switch ON
2. Input signal voltage is above 4.8V
P0115/3
3. 0.5 seconds
4. CHECK ENGINE on the TELEFLEX display
1. Key switch ON
2. Input signal voltage is below 0.2V
P0115/4
3. 0.5 seconds
4. CHECK ENGINE on the TELEFLEX display
Engine takes following coolant temperature as a default.
Fail Mode -15°C (5°F) at engine stop (for starting)
60°C (140°F) at engine running
Limited Operation
No limited operation
Yes
Fail Release
When input signal voltage goes to normal range (0.2 - 4.8 V) for 0.5 seconds
White smoke increases in cold conditions.
Remarks
Black smoke may increase at starting.
Fault
DTC / FMI
1. Open circuit of wire harness (signal and ground) or short to high voltage over 5V
P0115/3 2. Sensor failure
3. ECU failure
1. Wire harness (signal) short to ground
P0115/4 2. Sensor failure
3. ECU failure
Corrective action: See Temperature Sensor Diagnosis Procedure on page 13-40.
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
13-35