Lycoming TEO-540-C1A Maintenance Manual page 430

Fault ID 8
Fault
Application code area corrupt
Description
This fault indicates either failed attempt of application code CRC (Cyclic Redundancy
Check) OR boot Code not in the expected memory range OR application code not in the
Root Cause
expected memory range OR failed application version check. This fault may also indicate
a broken hardware memory
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 3. If yes, go to step 2.
2. Contact Lycoming Personnel to reprogram the ECU. Is fault active or reprogram unsuccessful? If no,
go to step 3. If yes, replace the ECU.
3. Clear Service faults using the FST by following the steps outlined in the "Access the Field Service
Tool" section in Appendix C or the latest revision of SSP-118.
4. If fault repeats, replace the ECU.
Fault ID 9
Fault
Application Calibration area corrupt
Description
This fault indicates a possibility of either failed unit calibration block CRC check OR
Root Cause
corrupted/failed memory. This fault may also indicate a broken hardware memory
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 3. If yes, go to step 2.
2. Contact Lycoming Personnel to reprogram the ECU. Is fault active or reprogram unsuccessful? If no,
go to step 3. If yes, replace the ECU.
3. Clear Service faults using the FST by following the steps outlined in the "Access the Field Service
Tool" section in Appendix C or the latest revision of SSP-118.
4. If fault repeats, replace the ECU.
Fault ID 10
Fault
CACHE memory corrupt
Description
Root Cause This fault indicates a possible CACHE memory corruption or failure
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 3. If yes, go to step 2.
2. Contact Lycoming Personnel to have the ECU reprogrammed. Is fault active or reprogram
unsuccessful? If no, go to step 3. If yes, replace the ECU.
3. Clear Service faults using the FST by following the steps outlined in the "Access the Field Service
Tool" section in Appendix C or the latest revision of SSP-118.
4. If fault repeats, replace the ECU.
Appendix D
Page 400
Fault Group 2
Troubleshooting Steps
Fault Group 2
Troubleshooting Steps
Fault Group 2
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name
[FAULT: APP CODE ERROR]
Fault Lamp
Fault Name
[FAULT: APP DATA ERROR]
Fault Lamp
Fault Name
[FAULT: CACHE CORRUPT]
Fault Lamp
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November 2018