Lycoming TEO-540-C1A Maintenance Manual page 453

TEO-540-C1A Engine Maintenance Manual
Fault ID 102
Fault
Description
Root Cause
Fault ID 103
Fault
Description
Root Cause
Fault ID 104
Fault
Local pre-flight test switch noise fault
Description
This fault indicates the primary and secondary channel ID are identical OR channel ID is
invalid on at least one of the two channel possibly due to memory corruption or GPIO
Root Cause
(General Purpose Input Output) issue.
1. Disconnect wires from switch. Does fault go inactive? If yes, replace the switch. If no, go to step 2.
2. Complete a continuity and short circuit test of the harness from the switch connector(s) to ECU
connectors using the engine system schematic. If the continuity or short circuit check fails, isolate to
affected harness by disconnecting the airframe interface connection AF-P1. If problem is isolated to
engine airframe harness, contact Lycoming Engines. If problem is found from switch to AF-J1, repair in
accordance with aircraft maintenance manual. If the continuity check is good, replace the ECU.
Fault ID 105
Fault
Local pre-flight test switch stuck fault
Description
This fault indicates the digital input local pre-flight test switch is stuck on possibly due to a
Root Cause
switch hardware issue. The fault will become inactive if the switch toggles to off position
1. Disconnect wires from switch. Does fault go inactive? If yes, replace the switch. If no, go to step 2.
2. Complete a continuity and short circuit test of the harness from the switch connector(s) to ECU
connectors using the engine system schematic. If the continuity or short circuit check fails, isolate to
affected harness by disconnecting the airframe interface connection AF-P1. If problem is isolated to
engine airframe harness, contact Lycoming Engines. If problem is found from switch to AF-J1, repair in
accordance with aircraft maintenance manual. If the continuity check is good, replace the ECU.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 13
Troubleshooting Steps
Fault Group 13
Troubleshooting Steps
Fault Group 14
Troubleshooting Steps
Fault Group 14
Troubleshooting Steps
Fault Name
-Reserved-
Fault Lamp
Fault Name
-Reserved-
Fault Lamp
[FAULT: local pre-flight test switch
Fault Name
noise]
Fault Lamp
[FAULT: local pre-flight test switch
Fault Name
stuck]
Fault Lamp
FFL
FFL
FFL
FFL
Appendix D
Page 423