Lycoming TEO-540-C1A Maintenance Manual page 463

TEO-540-C1A Engine Maintenance Manual
Fault ID 149
Fault
Engine Oil temperature slew rate fault
Description
This fault indicates the temperature sensor slew rate is greater than the calibrated
Root Cause
maximum.
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? *
If yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. Swap the oil temperature sensor with the fuel rail temp sensor (A012) and run the engine. Is there now
an active fuel rail temp slew rate fault? If yes, replace the sensor per the "Sensor Replacement
Procedures" section in Chapter 72-70. If no, complete a continuity test of the harness from the harness
sensor connector to the ECU connector using the engine system schematic. If the continuity check fails,
isolate to affected harness by disconnecting the firewall connection, then contact Lycoming Engines. If
the continuity checks good, replace the ECU.
*NOTE: This fault could be caused by another oil temperature fault. If there are any other active oil
temperature faults go to troubleshooting steps for the corresponding oil temperature fault.
Fault ID 150
Fault
Venturi Pressure slew rate fault
Description
Root Cause This fault indicates the pressure sensor slew rate is greater than the calibrated maximum.
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? *
If yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. Inspect sensor, and lead for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors, burned or broken sensors). If damaged, replace the sensor per the "Sensor Replacement
Procedures" section in Chapter 72-70. If no damage is found, go to step 4.
4. Inspect harness connection for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors). Contact Lycoming if harness damage is found. If no damage found, go to step 5.
5. Complete a continuity test of the harness from the harness sensor connector to the ECU connector using
the engine system schematic. If the continuity check fails, isolate to affected harness by disconnecting
the firewall connection, then contact Lycoming Engines. If the continuity checks good, replace the
sensor. If fault persists, replace the ECU.
*NOTE: This fault could be caused by another venturi pressure fault. If there are any other active venture
pressure faults go to troubleshooting steps for the corresponding venturi pressure fault.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 19
Troubleshooting Steps
Fault Group 19
Troubleshooting Steps
[FAULT: engine oil temperature
Fault Name
slew rate]
Fault Lamp
Fault Name
[FAULT: venturi pressure slew rate]
Fault Lamp
None
None
Appendix D
Page 433