BAROMETRIC PRESSURE SENSOR

INSTALLATION INSTRUCTIONS

1. Route the cable under the intake manifold and through the backing plate and cover plate slots along with the other system wires.

2. Depress the latches and un-plug the J2 and J6 receptacles from the MCU card. Do not pull on the wires while removing the receptacle, the wires can be damaged where they enter the receptacle. They are most easily unplugged together.

3. Insert the wire terminals in the receptacles, with the terminal ears to the top side of the receptacle. The red wire goes in J6 receptacle position 3 (J6-3), the black wire goes in J2-4, and the green wire goes in J2-12. The terminal positions are embossed in very small print on the face of the receptacles and the starting and ending positions (1, 8, 9, and 16 in the case of J2 or 1,4,5,8 for J6) are printed on the MCU card. They are also shown on the drawing below. Be careful not to bend the terminal when inserting, as it can be weakened by being bent and could result in a broken terminal later. Tug lightly on the wire to insure that the terminal is fully inserted that the locking tabs are engaged. Long-nosed pliers are the proper tool for terminal insertion.

4. Plug the receptacles back into the MCU card. Insure that receptacles' latches are engaged.

5. Cut the tiewrap below J6 and replace it, binding the new sensor cable with the other cables. Also tiewrap the cable to the other system cables under the air cleaner element. It is very important that all system wires are tiewrapped together under the air filter so that they will support each other against vibration.

6. Tiewrap the cable as required along the rest of its length, to provide a neat installation. The wire is long enough to mount the sensor under the tank or to tiewrap the sensor to the system's wiring and hoses between the cylinders. Do not mount the sensor such that the air inlet barb is directly exposed to the wind when at speed. This could lead to the sensor functioning more as a speedometer than an altimeter.

The barometric pressure sensor used is the Harley-Davidson MAP Sensor P/N 32424-95. This can be obtained from your local Harley dealer.

After physically installing the sensor as described above, it is necessary tell the ECS that it has been installed. This is done by accessing the Options submenu, scrolling to the AIR PRES. SENSOR command and pressing the middle button so that the display indicates INSTALLED. The % number (e.g. 98%) that shows on the second line of the display just before the word INSTALLED indicates the air pressure density relative to sea level pressure. When the display reads INSTALLED, the mixture is adjusted by this amount in order compensate for changes in air density. Lightly blowing or sucking on the air inlet barb will result in this number changing, which is an easy way to test the sensor. Too much pressure or vacuum will set an error flag indicating that the sensor is bad, in which case the mixture will not be changed until the error is cleared, either by cycling power to the system, or, in the case of a failed sensor, replacing the sensor.