Electronic Signal Modifier Installation Instructions
These instructions are only a guide to proper installation. It is the technicians’ responsibility to confirm all connections are correct, use of the proper factory service manual is recommended. We recommend that only a competent and qualified mechanic perform this installation
1) Disconnect negative terminal of battery.
2) Confirm correct plug, pin # and wire colors on ECU and ESM match the diagram provided. All connections are in one plug, check diagram for your vehicle. If there is any discrepancy between your car and the instructions consult the factory service manual to confirm proper pin locations.
3) Locate and confirm Signal wire from MAP sensor to ECU. Cut wire approximately 2” from plug. Strip a 1/2” of jacket off each end of the signal wire to expose the bare wire. Using the smaller of the two solder splice connectors (Clear adhesive ring) connect the signal from the ECU to the green wire on the ESM. Using the other small/clear solder splice connector connect the signal wire from the MAP sensor to the blue wire on the ESM.
4) Locate and confirm the MAP sensor ground wire. Cut the wire approximately 2” from plug. Strip a 1/2” of jacket off each end of the ground wire to expose the bare wire. Using the larger solder splice connector (red adhesive ring) connect the black wire from the ESM to the ground wire. On one side of the solder splice connector you will have one wire coming from the ECU into it and on the other side you will have two wires going into it, one from the MAP sensor along with the black wire from the ESM.
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