Teledyne Continental Motors, Inc.
TM
Non-Overhaul Removal and Replacement
IOF-240 Series Engine Maintenance Manual
10-61
29 November 2006
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.
Disconnect the grounding straps from the ECU.
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.
10-11.4. 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.
CAUTION: 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.
2.
Using a DVM, check the resistance at the following locations:
a.
Between the 50-pin connector header shell and a bare metal point on the engine.
b.
Between the 50-pin connector header shell and the body of each of the Fuel
Pressure Sensors and the Manifold Air Pressure (MAP) Sensors. The resistance
must be less than 0.5 ohms.
WARNING
If the resistance measured exceeds 0.5 ohms, the system
ground is faulty. Correct the fault before ECU installation.
3.
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, which connects to P2.
4.
Install the 50-pin connector according to the instructions in ECU or SSA Connector
Installation, Section 10-11.1.