Lycoming TEO-540-C1A Maintenance Manual page 438

Fault ID 32
Fault
Application 100ms task overrun
Description
The fault indicates a delay in execution/completion of a 100ms periodic task before the
Root Cause
request/scheduling of the next 100ms periodic task due to possible hardware interrupts
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 ECU.
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. If fault repeats, replace the ECU.
Fault ID 33
Fault
Application 10ms task overrun
Description
The fault indicates a delay in execution/completion of a 10ms periodic task before the
Root Cause
request/scheduling of the next 10ms periodic task due to possible hardware interrupts
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 ECU.
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. If fault repeats, replace the ECU.
Fault ID 34
Fault
Application 1ms task overrun
Description
The fault indicates a delay in execution/completion of a 1ms periodic task before the
Root Cause
request/scheduling of the next 1ms periodic task due to possible hardware interrupts
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 ECU.
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. If fault repeats, replace the ECU.
Fault ID 35
Fault
Application task overrun causing reset
Description
The fault indicates more consecutive tasks overruns than allowed due to possible hardware
Root Cause
interrupts
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 ECU.
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. If fault repeats, replace the ECU.
Appendix D
Page 408
Fault Group 5
Troubleshooting Steps
Fault Group 5
Troubleshooting Steps
Fault Group 5
Troubleshooting Steps
Fault Group 5
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name
[FAULT: 100ms task overrun]
Fault Lamp
Fault Name
[FAULT: 10ms task overrun]
Fault Lamp
Fault Name
[FAULT: 1ms task overrun]
Fault Lamp
Fault Name
[FAULT: TASK OVERRUN]
Fault Lamp
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November 2018