Yanmar 6LY3 series Service Manual page 326

TROUBLESHOOTING
P0118/0 (Coolant Temperature Too High)
DTC
DTC Fault Code
DTC / FMI
1. Key switch ON
2. Coolant temperature above 110°C (230°F)
P0118/0
3. 0.5 seconds
4. HOT ENGINE, PWR REDUCTION on the TELEFLEX display
Fail Mode
Limited Operation
Fail Release
Limited Operation Release
Remarks
Fault
DTC / FMI
P0118/0
Troubleshooting Procedure
1. Check the seawater pump impeller.
2. Check the seacock.
3. Check the seawater system.
4. Check the coolant level.
5. Check the coolant system.
6. Check the contamination of the heat exchanger.
13-36
P0118/0 Coolant Temperature Too High
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
Engine over-heat condition results in limited operation.
Maximum engine speed is limited to 1800 rpm.
Yes
When coolant temperature got below 95°C (203°F)
Yes
After fail released and also throttle position at low idle position
—
Seawater Pump Impeller
Seacock
Seawater System
Coolant Level
Coolant System
Contamination of Heat Exchanger
Thermostat
Coolant Pump
V-Belt
Faulty Coolant Temperature Sensor
© 2007 Yanmar Marine International
Troubleshooting by DTC Fault Codes
Probable Cause
7. Check the thermostat.
8. Check the coolant pump.
9. Check the V-belt driving the coolant pump.
10. Check the coolant temperature sensor.
11. Check the wire harness.
6LY3 Service Manual
Check Point
Coolant system
Seawater system
Sensor