Troubleshooting
Teledyne Continental Motors, Inc.
TM
8-18
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
Table 8-3.
Sensor Fault Conditions
Manifold Pressure Fault
High Range Limit
Manifold air pressure sensor voltage exceeds the expected
maximum value stored in the ECU.
Low Range Limit
Manifold air pressure sensor voltage is less than the expected
minimum value stored in the ECU.
Rate
Manifold air pressure sensor rate change exceeds the programmed
limits stored in the ECU.
Fuel Pressure Fault
High Range Limit
Fuel pressure sensor voltage exceeds the expected maximum
value stored in the ECU.
Low Range Limit
Fuel pressure sensor voltage is less than the expected minimum
value stored in the ECU.
In-Range Fault
Fuel pressure sensor voltage indicates fuel pressure is 5 psia or
more below the value expected for the engine speed.
Manifold Temperature Faults
High Range Limit
The ECU detects the manifold air temperature sensor resistance
exceeds the maximum value stored in the ECU.
Low Range Limit
The ECU detects the manifold air temperature sensor resistance is
less than the minimum expected value stored in the ECU.
Rate
The manifold air temperature sensor resistance rate of change is
faster than the ECU considers valid.
CHT Faults
High Range Limit
The ECU detects the cylinder head temperature sensor resistance
exceeds the maximum value stored in the ECU.
Low Range Limit
The ECU detects the cylinder head temperature sensor resistance
is less than the minimum expected value stored in the ECU.
Rate
The cylinder head temperature sensor resistance rate of change is
faster than the ECU considers valid.
EGT Faults
High Range Limit
The ECU detects the exhaust gas temperature sensor resistance
exceeds the maximum value stored in the ECU.
Low Range Limit
The ECU detects the exhaust gas temperature sensor resistance is
less than the minimum expected value stored in the ECU.
Rate
The exhaust gas temperature sensor resistance rate of change is
faster than the ECU considers valid.
Primary or Secondary Voltage
Low Range Limit
Airframe supplied voltage is below the minimum programmed level
High Range Limit
Airframe supplied voltage is above the maximum programmed level
SSA Faults
N
e
/N
c
Validity*
Number of N
e
occurrences between N
c
events is not 11
Spurious N
e
Erratic N
e
signal detected
Spurious N
c
Erratic N
c
signal detected
*N
e
=engine speed
N
c
=cam position