Lycoming TEO-540-C1A Maintenance Manual page 558

Fault ID 479
Fault
Description
Root Cause
Fault ID 480
Fault
Arithmetic processing unit fault
Description
This fault indicates a fault with the arithmetic processor possibly due to a memory
Root Cause
corruption or processor failure
Fault ID 481
Fault Configurable value range check failed
Description fault
This fault indicates one or more of the configurable values exceed their upper or lower
Root Cause
limits
Fault ID 482
Fault
Excessive programming time fault
Description
Root Cause This fault indicates programming did not complete within the timeout limit
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault still active? If yes, replace ECU. If no, go to step 2.
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 483
Fault
Description
Root Cause
Fault ID 484
Fault
Description
Root Cause
Appendix D
Page 528
Fault Group 60
Troubleshooting Steps
Fault Group 61
Fault Group 61
Fault Group 61
Troubleshooting Steps for Faults 480 thru 482
Fault Group 61
Troubleshooting Steps
Fault Group 61
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name -Reserved-
Fault Lamp
Fault Name
[FAULT: ArithPU]
Fault Lamp
[FAULT: configurable value range
Fault Name
check failed]
Fault Lamp
[FAULT: Excessive Programming
Fault Name
Time]
Fault Lamp
Fault Name -Reserved-
Fault Lamp
Fault Name -Reserved-
Fault Lamp
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November 2018