aFepower.com
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Stock ECM J3 Port Preparation
aFepower.com
Page 7
Once you have the ECM removed, on the opposite end of the wiring harness plug is a
small plastic or metal cover. Remove this cover gently. Inside this J3 port is a circuit
board with double-sided contacts that must be cleaned of conformal coating. J3 Port
contacts must be cleaned thoroughly, or the chip will not make proper contact with the
ECM.
Scrub off the coating using the Scotch-Brite pad provided or a fine sandpaper. The
contacts should start to become shiny and metallic copper color. Scrub only until you
begin to see a hint of copper. Wipe off any remaining coating with rubbing alcohol or
lacquer thinner on a paper towel.
Please verify that BOTH sides of the edge connector were cleaned thoroughly.
Improper cleaning is the most common reason for chip failure or incorrect operation.
