Ecu Removal - Lycoming TEO-540-C1A Maintenance Manual

J. Attach the following connectors to the power box receptacle:
(1) A002-P1 to PRI.
(2) A002-P2 to SEC.
K. Connect harness plug AF-P1 to the airframe interface wiring harness connector.
L. Connect harness plug AF-P2 to the airframe interface wiring harness connector.
M. Reconnect the battery and reset the EECS/ECU circuit breaker.
N. Complete the operational ground check in Chapter 72-00.

15. ECU Removal

NOTICE: The Engine Control Unit (ECU) configuration is unique for each engine is not to be
interchanged and installed on other engines.
Disconnect the battery.
A.
Pull the EECS/ECU breaker to disconnect power to the EECS.
B.
Disconnect the airframe interface harness plug from the ECU large (100-pin) receptacle
C.
identified as PRI. Refer to Appendix B in this manual.
Disconnect the airframe interface harness plug from the ECU small (37-pin) receptacle
D.
identified as PRI.
Disconnect the airframe interface harness plug from the ECU large (100-pin) receptacle
E.
identified as SEC.
Disconnect the airframe interface harness plug from the ECU small (37-pin) receptacle
F.
identified as SEC.
Remove the ECU in accordance with instructions in the airframe maintenance manual.
G.
16. ECU Installation
CAUTION THE ECU HAS A SPECIFIC CONFIGURATION FOR EACH ENGINE AND
THE AIRFRAME. THE ECU AND ENGINE HAVE FACTORY-
DESIGNATED SERIAL NUMBERS THAT GO TOGETHER. MAKE SURE
THE SERIAL NUMBER FOR THE ECU AGREES WITH THE SERIAL
NUMBER ON THE ENGINE. IF THE SERIAL NUMBERS DO NOT AGREE,
DO NOT INSTALL THE ECU. CONTACT LYCOMING ENGINES
IMMEDIATELY.
NOTICE: The ECU configuration is unique for each engine and is not to be installed for any
other engine unless a new configuration is loaded.
A. Install the ECU in accordance with instructions in the airframe maintenance manual.
B. Connect the appropriate airframe interface harness plug to ECU large (100-pin) receptacle
identified as PRI. Refer to Appendix B in this manual.
C. Connect the appropriate airframe interface harness plug A001-P2 to ECU large (100-pin)
receptacle identified as SEC.
D. Connect the appropriate airframe interface harness plug A001-P3 to ECU small (37-pin)
receptacle identified as PRI.
E. Connect the appropriate airframe interface harness plug A001-P4 to ECU small (37-pin)
receptacle identified as SEC.
72-70
Page 298
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
© 2018 Avco Corporation. All Rights Reserved
November 2018