Lycoming TEO-540-C1A Maintenance Manual page 432

Fault ID 14
Fault
TLB instruction access exception
Description
This fault indicates an invalid entry from the instruction translation lookup into the TLB
(Translation Lookaside Buffer) caused by a possible hardware issue (processor, memory
Root Cause
corruption)
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 15
Fault
Master configuration corrupt
Description
Root Cause This fault indicates a failed checksum for Master configuration block.
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 16
Fault
Machine Check Exception
Description
This fault indicates a machine check exception Interrupt Vector Register 1 (IVOR1) from
Root Cause
processor possibly due to a 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.
Appendix D
Page 402
Fault Group 2
Troubleshooting Steps
Fault Group 2
Troubleshooting Steps
Fault Group 3
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name
[FAULT: INSTRUCTION TLB]
Fault Lamp
Fault Name
[FAULT: MASTER CFG ERROR]
Fault Lamp
Fault Name
[FAULT: MACHINE CHECK]
Fault Lamp
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NTO
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NTO
November 2018