Teledyne Continental Motors, Inc.
TM
Troubleshooting
8-6.6. Fuel Pressure Sensor
The FADEC System uses two sensors for measuring the engine’s fuel pressure. The
sensors are self-contained, non-serviceable units, thread-mounted into the fuel
distribution block. The low voltage harness uses removable, circular connectors to
interface with the fuel pressure sensors.
Fuel Pressure Sensor Failure
Disconncet Sensor 1
(connected to P9)
Cylinder?
Disconnect Sensor 2
(connected to P10)
1 or 4
2 or 3
Replace the fuel pressure
sensor.
Secure the engine low voltage
harness.
Perform FADEC Level I
Diagnostic (Section 8-6-1) or
Engine Operational Check
(Sect. 6-1).
NOT OK
OK
Secure the engine low voltage
harness.
Perform FADEC Level I
Diagnostic (Section 8-6-1) or
Engine Operational Check
(Sect. 6-1).
Replace ECU
(Section 10-11)
Repair wiring (Sect. 10-10)
OK
NOT OK
Master Power Switch……....ON
FADEC Primary Power…….ON
FADEC Secondary Power...ON
Check voltage between pins:
5.0
± 0.05 VDC
A and C
D and F
Disconnect P1 and P2
Master Power Switch……....OFF
FADEC Primary Power…….OFF
FADEC Secondary Power...OFF
Check continuity between pins:
P10 pin A - P2 pin 12
P10 pin B - P2 pin 11
P10 pin C - P2 pin 45
P10 pin D - P1 pin 16
P10 pin E - P1 pin 17
P10 pin F - P1 pin 48
P9 pin A - P1 pin 12
P9 pin B - P1 pin 11
P9 pin C - P1 pin 45
P9 pin D - P2 pin 16
P9 pin E - P2 pin 17
P9 pin F - P2 pin 48
IOF-240 Series Engine Maintenance Manual
8-17
31 August 2007
Change 1