Lycoming TEO-540-C1A Maintenance Manual page 444

9. Inspect aircraft fuel system for any blockage that may result in fuel starvation at the fuel rails per the
"Fuel System Inspection Checklist in Chapter 73-10 and purge the fuel system if necessary. If fuel
system checks good, refer to troubleshooting for fault recorded in step 4.
10. Verify fuel injector connector is seated on injector. If so, swap injector with another cylinder. Does the
fault move with the injector? If yes, replace the injector. If no, complete a continuity check of harness
from fuel injector connector to ECU connector using the engine system schematic. If the continuity
check fails, isolate to affected harness by disconnecting firewall harness and repeating the continuity
check, then contact Lycoming Engines.
Fault ID 64
Fault
Cylinder 1 Ignition output failure
Description
Fault ID 65
Fault
Cylinder 2 Ignition output failure
Description
Fault ID 66
Fault
Cylinder 3 Ignition output failure
Description
Fault ID 67
Fault
Cylinder 4 Ignition output failure
Description
Fault ID 68
Fault
Cylinder 5 Ignition output failure
Description
Fault ID 69
Fault
Cylinder 6 Ignition output failure
Description
Fault ID 70
Fault
Cylinder 7 Ignition output failure
Description
Fault ID 71
Fault
Cylinder 8 Ignition output failure
Description
This fault occurs when a circuit fault is consistently detected on the Ignition Driver.
This fault is an indication of an incorrect current feedback indicated to the TPU (zero
Root Cause
current in case of Open Circuit detection and higher than a threshold current for Short
Circuit detection)
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? If
yes, continue. If no, go to step 4. Are there active faults for other cylinders? If yes, go to step 6. If no,
go to step 2.
Appendix D
Page 414
Troubleshooting Steps for Faults 56 thru 63 (Cont.)
Fault Group 9
Fault Group 9
Fault Group 9
Fault Group 9
Fault Group 9
Fault Group 9
Fault Group 9
Fault Group 9
Troubleshooting Steps for Faults 64 thru 71
TEO-540-C1A Engine Maintenance Manual
[FAULT: Cylinder 1 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 2 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 3 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 4 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 5 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 6 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 7 ignition output
Fault Name
failure]
Fault Lamp
[FAULT: Cylinder 8 ignition output
Fault Name
failure]
Fault Lamp
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November 2018