[TMS]

Perhaps you’ll find this helpful.

You need to calibrate both the input trigger and the output voltage on your car.

Below are my instructions on how to do this. Since you are using the accelerator pedal you need to configure the unit to ramp in using 0-5v sensor (accelerator pedal is the sensor) and not a time ramp. Thus switch #3 must be set to on. Further, you want to set switch #4 to on and #5 off so it configures the unit for a 0.4V increment which is the smallest increment. This will give the most granularity of the ramp in using the accelerator pedal. If this incremental voltage is set too high based on the dipswitch combinations of 4 and 5, then when the voltage starts ramping up it might go from 14.4v Base to 17.47V starting at 50% throttle and maxing out early at 60% throttle. We want to spread the ramp-in over the largest percentage of pedal movement possible (something like ramp in at 50% throttle and maxes out around 80% throttle).

Steps for configuration:

Note: it really helps to have a second person when it comes to setting the ramp-in trigger using the accelerator pedal.

1) You'll test voltage on the white wire of the JMS booster (I used a sharp voltmeter probe to pierce the wire insulation).
2) On the dip switches - 1 is on (program settings mode), 2 is off, 3 is on, 4 is on, 5 is off.
3) Output Voltage Set - Two ground wires coming out of the JMS Pedal harness near the accelerator (gray and black) get touched together with car running. Turn the dial knob on the JMS unit labeled "adjust output voltage" until you get as close to 17.47V as you can on the voltmeter. At this point, you have set the output max voltage. Turn dip switch 1 off to save the programming changes (before you kill power). Now, disconnect the two ground wires (gray & black) from each other and tape each of them up so they don't accidentally ground out. These stay unconnected. Shut ignition off.

4) Input voltage ramp-in trigger - This is where a 2nd person comes in handy. Turn the ignition on with engine off. Turn Dip switch 1 on to go into programming mode. With HPTuners VCMScanner connected (or whatever tuner you are using), monitor the "Accelerator Pedal Position" channel. Push accelerator pedal down until you reach as close to 50% on this channel (pedal should be about half way down). Now while one of you is holding the pedal steady at 50% have the second set of hands turn the "Adjust Input Trigger" dial on the JMS unit up or down until the base voltage of 14.4V begins to just start ramping up. Once that dial is set, test your ramp-in to make sure everything works properly. Simply let off of the accelerator pedal. Have your partner watch the voltmeter. It should stay steady at about 14.4V. then slowly press the pedal down until you get to 50%. 0%-50% throttle should stay at 14.4V. Once you go above 50%, the voltmeter should start registering an increase in voltage. Have your helper call out the voltage while you keep pressing the pedal down. Your partner should see the voltage climb up to and max out at 17.47v or so (whatever the max voltage ended up being on the previous step). It will likely max out somewhere between 75% and 80% throttle position which is perfect. Then, as one final test, just mash the pedal to the floor and make sure the voltage goes to 17.47v. Now make sure you turn dipswitch 1 off to save your settings (before you kill the ignition).

You're Done!

Hope this helps.

Trevor