Lycoming TEO-540-C1A Maintenance Manual page 554

Fault ID 461
Fault
Description
Root Cause
Fault ID 462
Fault
Description
Root Cause
Fault ID 463
Fault
Description
Root Cause
Fault ID 464
Fault
Real time clock time discrepancy
Description
Root Cause This fault indicates RTC time differs between the primary and secondary channels.
Fault ID 465
Fault Real time clock time invalid fault
Description
Root Cause This fault indicates an invalid has been received from data logger
1. Is fault active or logged? If yes, go to step 2. If no, go to step 5.
2. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault still active? If yes, go to step 3. If no, go to step 5.
3. Inspect the data logger and cabling for damage. If damage is noted, repair damage in accordance with
the aircraft maintenance manual. If data logger is damaged, replace. If no damage noted, go to step 4.
4. Complete a continuity test of the harness from the data logger connector to the ECU connector using the
engine system schematic in Appendix B and airframe wiring manual. If the continuity check fails,
isolate to affected harness by disconnecting the airframe interface connection AF-P1. If the continuity
fails between the data logger and AF-J1, repair cable in accordance with aircraft maintenance manual.
If the continuity fails between AF-P1 and ECU, contact Lycoming Engines. If the continuity checks
good, replace the data logger.
5. 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.
Appendix D
Page 524
Fault Group 58
Troubleshooting Steps
Fault Group 58
Troubleshooting Steps
Fault Group 58
Troubleshooting Steps
Fault Group 59
Fault Group 59
Troubleshooting Steps for Faults 464 and 465
TEO-540-C1A Engine Maintenance Manual
Fault Name -Reserved-
Fault Lamp
Fault Name -Reserved-
Fault Lamp
Fault Name -Reserved-
Fault Lamp
Fault Name
[FAULT: RTC time discrepancy]
Fault Lamp
Fault Name
[FAULT: RTC time invalid]
Fault Lamp
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November 2018