Teledyne Continental Motors, Inc.
TM
Non-Overhaul Removal and Replacement
IOF-550 Permold Series Engine Maintenance Manual
10-39
1 April 2007
7.
Firmly grasp the edges of the 50-pin connector backshell and pull the connector away
from the ECU.
WARNING
Do not separate the connector from the ECU by pulling on the
wiring harness leads. Pulling the wiring harness can cause
permanent, irreparable damage to the engine low voltage
harness which may result in engine malfunction.
8.
Remove and discard the EMI gasket and environmental seal.
9.
Place a protective cover over the mating end of the engine low voltage harness 50-pin
connector.
10.
Remove both ground straps from the ECU according to instruction in Section 10-6.2,
"Ground Strap Removal.”
11.
Remove the four ECU mounting bolts.
12.
Remove the ECU from the airframe. Place a protective cover over the ECU 50-pin
connector header and place the ECU in an antistatic bag.
10-6.5. Electronic Control Unit (ECU) Installation
CAUTION: Each ECU is shipped in a sealed, anti-static plastic bag.
Keep the ECU in the antistatic bag until time to install it on the
engine to prevent electrostatic discharge damage.
When handling the ECU, the handler and the ECU must be
grounded together prior to connecting the 50-pin connector header.
To prevent inadvertent electrostatic discharge to the connector pins,
keep the connector cover in place until the ECU is ready to be
installed.
Procedure
1.
Disconnect electrical power to the engine; prepare the mounting location for the ECU
per airframe instructions in the locations specified by the airframe original equipment
manufacturer (OEM) or STC holder.
WARNING
If the resistance measured exceeds 0.5 ohms, the system
ground is faulty. Correct the fault before ECU installation.
2.
Remove the ECU from its protective bag. Locate the TCM part number on the ECU
identification label. The part number format is XXXXXX-X. The “dash” number
after the hyphen identifies the designated ECU location. Each ECU must be installed
in the correct location in order for the system to function properly. ECU 1 will have a
dash number of 1 and connect to P1. A number 2 after the hyphen designates the
ECU as ECU 2, connected to P2; a 3 in the dash number of the TCM part number
designates the ECU as ECU 3, which connects to P3.