Lycoming TEO-540-C1A Maintenance Manual page 518

Fault ID 321
Fault
SH priority 2 corrupt record fault*
Description
Root Cause This fault indicates a memory corruption in the priority 2 service history rolling buffer
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 2. If yes, go to step 3.
2. 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.
3. Set ignition switch to on, do not start engine, complete step 2. Is fault still active? If no, sequence
complete. If yes, replace the ECU.
*NOTE: This fault does not cause any performance or operational limitations.
Fault ID 322
Fault
SH priority 3 corrupt record fault*
Description
Root Cause This fault indicates a memory corruption in the priority 3 service history rolling buffer
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 2. If yes, go to step 3.
2. 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.
3. Set ignition switch to on, do not start engine, complete step 2. Is fault still active? If no, sequence
complete. If yes, replace the ECU.
*NOTE: This fault does not cause any performance or operational limitations.
Fault ID 323
Fault
SH priority 4 corrupt record fault*
Description
Root Cause This fault indicates a memory corruption in the priority 4 service history rolling buffer
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 2. If yes, go to step 3.
2. 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.
3. Set ignition switch to on, do not start engine, complete step 2. Is fault still active? If no, sequence
complete. If yes, replace the ECU.
*NOTE: This fault does not cause any performance or operational limitations.
Appendix D
Page 488
Fault Group 41
Troubleshooting Steps
Fault Group 41
Troubleshooting Steps
Fault Group 41
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
[FAULT: SH Priority 2 Corrupt
Fault Name
Record]
Fault Lamp
[FAULT: SH Priority 3 Corrupt
Fault Name
Record]
Fault Lamp
[FAULT: SH Priority 4 Corrupt
Fault Name
Record]
Fault Lamp
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November 2018