Appendix D
© 2018 Avco Corporation. All Rights Reserved
Page 454
November 2018
TEO-540-C1A Engine Maintenance Manual
Troubleshooting Steps for Faults 208 thru 215 (Cont.)
3.
Inspect the sensor, sensor lead and connector. If there is damage found, replace the sensor
per the “Sensor
Replacement Procedure” in Chapter 72-70
. If there is no damage, go to step 4.
4.
Inspect engine harness for visible signs of damage. If damage is found, contact Lycoming Engines. If no
damage is found, go to step 5.
5.
Swap the sensor from the channel giving the fault with another sensor in a different position and run the
engine. Did the fault move with the sensor? If yes, replace the sensor
per the “Sensor Replacement
Procedure” in Chapter 72-70
. If no, complete a continuity test of the harness from the harness sensor
connector to the ECU connector using the engine system schematic. If the continuity check fails, isolate to
affected harness by disconnecting the firewall connection, then contact Lycoming Engines. If the continuity
checks good, replace the ECU.
6.
If the above steps are unsuccessful, contact Lycoming.
Fault ID
216
Fault Group
28
Fault Name
[FAULT EGT 2 External
Supply Fault]
Fault
Description
Primary: EGT2 External Reference Fault
Secondary: -reserved-
Fault Lamp
None
Fault ID
217
Fault Group
28
Fault Name
[FAULT EGT 4 External
Supply Fault]
Fault
Description
Primary: EGT2 External Reference Fault
Secondary: -reserved-
Fault Lamp
None
Fault ID
218
Fault Group
28
Fault Name
[FAULT EGT 6 External
Supply Fault]
Fault
Description
Primary: EGT2 External Reference Fault
Secondary: -reserved-
Fault Lamp
None
Fault ID
219
Fault Group
28
Fault Name
[FAULT EGT 8 External
Supply Fault]
Fault
Description
Primary: EGT2 External Reference Fault
Secondary: -reserved-
Fault Lamp
None
Fault ID
220
Fault Group
28
Fault Name
[FAULT EGT 1 External
Supply Fault]
Fault
Description
Primary -reserved-
Secondary EGT1 External Reference Fault
Fault Lamp
None
Fault ID
221
Fault Group
28
Fault Name
[FAULT EGT 3 External
Supply Fault]
Fault
Description
Primary -reserved-
Secondary EGT3 External Reference Fault
Fault Lamp
None
Fault ID
222
Fault Group
28
Fault Name
[FAULT EGT 5 External
Supply Fault]
Fault
Description
Primary -reserved-
Secondary EGT5 External Reference Fault
Fault Lamp
None
Fault ID
223
Fault Group
28
Fault Name
[FAULT EGT 7 External
Supply Fault]
Fault
Description
Primary -reserved-
Secondary EGT7 External Reference Fault
Fault Lamp
None
Root Cause
This fault occurs if there is a loss of the ACJ (Auto Cold Junction) in the ECU.
Troubleshooting Steps
1.
Is the fault active? If no, go to step 2. If yes, are there any other ACJ faults? If yes, go to
troubleshooting procedure for corresponding fault. If no, replace the ECU. Then go to step 2.
2.
Using the FST, download active and service fault logs, then clear fault logs and monitor engine operation
for the fault to repeat.
