Troubleshooting The Pressure Sensor - Yanmar 6LY3 series Service Manual

TROUBLESHOOTING
DTC Fault Code
DTC / FMI
1. Key switch ON
2. Input signal voltage is above 3.6V
P0235/3
3. 0.5 seconds
4. PWR REDUCTION, CHECK ENGINE on the TELEFLEX display
1. Key switch ON
2. Input signal voltage is below 0.2V
P0235/4
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.
P0235/3 2.
3.
1.
P0235/4 2.
3.
Troubleshooting Procedure
See Troubleshooting the Pressure Sensor on page 13-77.
13-54
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
Engine takes the following boost pressure as a default:
0 kPa (0 psi)
Maximum engine speed is limited to 1800 rpm.
Yes
When the input signal voltage goes to normal range (0.5 - 3.6V)
Yes
After failure is cleared and also when throttle position is at low idle position
Sensor supply voltage must be kept below 6V. Once the sensor supply voltage exceeds 6V,
damage occurs. Replace the pressure sensor. To check if voltage was exceeded, check the
status of the DTC 1230/0 (short to 12V).
SIGNAL wire harness open or short to ground
5V sensor wire harness open
Sensor failure
SIGNAL wire harness open or short to ground
5V sensor wire harness open
Sensor failure
© 2007 Yanmar Marine International
Troubleshooting by DTC Fault Codes
Probable Cause
6LY3 Service Manual
Check Point
Wire harness
Boost pressure sensor
Wire harness
Boost pressure sensor