© 2018 Avco Corporation. All Rights Reserved
Appendix D
November 2018
Page 499
TEO-540-C1A Engine Maintenance Manual
Fault ID
360
Fault Group
46
Fault Name
[FAULT: Power Down Diagnostic
Failure]
Fault
Description
Power Down diagnostic failure fault
Fault Lamp
None
Root Cause
This fault indicates the power remains on after a power down warning was detected.
Troubleshooting Steps
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, replace the Power Box.
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.
Fault ID
361
Fault Group
46
Fault Name
[FAULT: Power Down Diagnostic
Noise]
Fault
Description
Power Down diagnostic noise fault
Fault Lamp
None
Root Cause
This fault indicates the power down diagnostic pin is noisy.
Troubleshooting Steps
1.
Is the fault active? If no, go to step 2. If yes, are there any other active or logged Power Box (APU)
faults? If yes, replace the Power Box. If no, 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.
Complete a continuity test and short circuit test of the harness as shown in the table below using a multi-
meter and the engine system schematic. If the continuity check fails, contact Lycoming Engines. If the
continuity checks good, replace the Power Box. Then go to step 2.
ECU Connector
Pin
Power Box Connector
Pin
A001-P1 (PRI)
77
A002-P1 (PRI)
22
A001-P2 (SEC)
77
A002-P2 (SEC)
22
Fault ID
362
Fault Group
46
Fault Name
-Reserved-
Fault
Description
Fault Lamp
None
Root Cause
Troubleshooting Steps
Fault ID
363
Fault Group
46
Fault Name
-Reserved-
Fault
Description
Fault Lamp
None
Root Cause
Troubleshooting Steps