Lycoming TEO-540-C1A Maintenance Manual page 433

TEO-540-C1A Engine Maintenance Manual
Fault ID 17
Fault
Data Store Exception
Description
This fault indicates a data storage exception Interrupt Vector Register 2 (IVOR2) from
Root Cause
processor possibly 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 18
Fault
Instruction Read Exception
Description
This fault indicates an instruction storage exception Interrupt Vector Register 3 (IVOR3)
Root Cause
from processor possibly 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 19
Fault
Undefined Module Interrupt Exception
Description
This fault indicates an undefined external interrupt exception Interrupt Vector Register 4
Root Cause
(IVOR4) from processor possibly 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.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 3
Troubleshooting Steps
Fault Group 3
Troubleshooting Steps
Fault Group 3
Troubleshooting Steps
Fault Name
[FAULT: DATA STORE]
Fault Lamp
Fault Name
[FAULT: INSTRUCTION STORE]
Fault Lamp
[FAULT: UNDEFINED
Fault Name
INTERRUPT]
Fault Lamp
NTO
NTO
NTO
Appendix D
Page 403