Lycoming TEO-540-C1A Maintenance Manual page 435

TEO-540-C1A Engine Maintenance Manual
Fault ID 23
Fault
System Call Exception
Description
This fault indicates a System call exception Interrupt Vector Register 8 (IVOR8) possibly
Root Cause
due to an ECU hardware issue.
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 3. If yes, go to step 2.
2. Contact Lycoming Personnel to have the ECU reprogrammed. Is fault active or reprogram
unsuccessful? If no, go to step 3. If yes, replace the ECU.
3. 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.
4. If fault repeats, replace the ECU.
Fault ID 24
Fault RPRA memory corruption (Internal
Description RAM)
This fault indicates a corrupted Reset Persistent RAM area due a possible ECU hardware
Root Cause
issue.
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 3. If yes, go to step 2.
2. Contact Lycoming Personnel to have the ECU reprogrammed. Is fault active or reprogram
unsuccessful? If no, go to step 3. If yes, replace the ECU.
3. 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.
4. If fault repeats, replace the ECU.
Fault ID 25
Fault RPRA (Reset Persistent RAM) area not
Description validated during exception processing
This fault indicates an interruption caused by an exception during a write event to the
Root Cause
shared RPRA. The fault was triggered due to a possible ECU hardware issue.
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 3. If yes, go to step 2.
2. Contact Lycoming Personnel to have the ECU reprogrammed. Is fault active or reprogram
unsuccessful? If no, go to step 3. If yes, replace the ECU.
3. 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.
4. If fault repeats, replace the ECU.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 3
Troubleshooting Steps
Fault Group 4
Troubleshooting Steps
Fault Group 4
Troubleshooting Steps
Fault Name
[FAULT: SYSTEM]
Fault Lamp
Fault Name
[FAULT: RPRA CORRUPT]
Fault Lamp
FAULT: RPRA INCOMPLETE
[
Fault Name
EXCEPTION]
Fault Lamp
NTO
NTO
NTO
Appendix D
Page 405