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