Installation Instructions
BRZ, FR-S, and GT86 Download
PDF
Configuration and Setup:
Your new P3cars.com
gauge is packed with many advanced features, but has been
designed to work for your car pretty much right out of the
box. There are a few settings that you may wish to change
such as english or metric units, or selecting the proper
engine model for your car, or setting the analog inputs for additional sensors. Below is a basic description of the gauges
different features and modes.
Wiring:
When first installing, connect ONLY
the obd2 connector.
GREEN=dimmer
BROWN=Analog1 BLUE=Analog2 AUX PLUG=external boost sensor
Main Button Functions
Left Button TAP = Peak recall (and
start 15 second record)
Left Button HOLD = 15 sec playback
Right Button TAP = View Current Mode Name (If pressed again within 5
sec, change mode)
Right Button HOLD = Night / Day Dimmer toggled (if
auto-dimming is not enabled)
Gauge Modes
Boost: This mode will show vacuum and boost.
Depending on settings in the config menu this may be from VAG
ecu data or an external analog sensor. Boost is read in PSI by
default and Vacuum is inHg. If you configure the gauge to
metric boost will be in BAR.
Coolant: This mode will show your current coolant
temp. Unlike the needle on your dash, this will show you
exactly the temp that your engine is currently running at, and
is configurable between Celsius & Fahrenheit.
Air:
Air
intake temperature. This is the reading of the temperature of
the air entering the engine, and is configurable between
Celsius & Fahrenheit.
Oil:
Oil temperature. This is the reading of the temperature of
the engine Oil, and is configurable between
Celsius & Fahrenheit.
Igntn: Actual ignition timing. This mode will show
you the ignition timing of your engine in real-time.
Egt: Exhaust Gas Temperature. This is the temp of
the exhaust gas as calculated by your ECU.
Throttle: Actual throttle plate position. Use this
mode to see how your car changes the actual drive by wire
throttle blade in relation to what your foot tells it to do.
rp-Shift:
RPM
readout. It can be handy to use this mode to see an exact RPM
or to record/playback and see your shifts.
Speed: Actual roadspeed direct from VSS. This is
the actual roadspeed value of the car, uncorrected. This is
the raw value, therefore it may not match your cluster which
tends to read high in many cars.
0-60:
Zero
to sixty Performance Timer. Come to a stop and this mode will
read “Rdy…” The gauge is ready for you to accelerate to 60. As
you accelerate the gauge will time you and automatically stop
when you hit 60, leaving your time on the screen. When you
slow to zero again the gauge will change to “Rdy…”
Batt: Battery Voltage. This is
the voltage of your cars power system, anything between
13-14.5 volts while running is normal.
AFr: Air/Fuel Ratio. This is
the real-time Air to Fuel ratio, Stoich of gasoline is 14.7.
Configuring the Gauge
For version 2.1+ simply hold both buttons to enter the config menu, you can do this at any time! RELEASE the button as soon as you see the word “Conf”. SAVING YOUR SETTINGS: Your settings will not be saved until you exit the config menu by HOLDING the right button until the gauge resets.
Config Button Functions:
Left Button TAP = Change Value
Left Button HOLD = Change Value fast repeat
Right Button TAP = Change to next config
mode
Right Button HOLD = EXIT
config menu and SAVE settings.
| Default | Values | Fuction |
|---|---|---|
| D.On | On or Off or On.A or On.P | Turn the gauge display ON or OFF or ON-Auto-Dimming(if you have attached the green wire to your dimmer line) or ON-Persistant-Dimmer(for dimmer setting not resetting on restarts.) |
| En.Y | Y or N or b | English units? No = Metric, Y = English, b = Boost only (boost in PSI, rest in metric) |
| Pr0.1 | 0.1 or 0.5 or 1.0 | Pressure resolution/decimal point. 0.1 = tenths, 0.5 is rounded to 5 tenths, 1.0 = whole numbers only |
| U.bg.Y | Y or N | Vacuum bargraph in boost mode – set to N for no bargraph while in vacuum |
| Ob.07 | 30 – 80 | Overboost flash activation, the PSI that will will make the screen flash for overboost |
| Bst.d | d or A or n | Boost reading – digital or analog or none. (analog is for gauges with boost sender and tubing to manifold) Digital is for boost from diag port and MAP sensor. |
| A1.N | Y or N | Enable or disable the first analog input (brown wire) |
| A2.N | Y or N | Enable or disable the second analog input (blue wire) |
| Clr.C | None | Hold the first button to clear codes. |
| Cal.b | None | Calibrate the analog boost sensor to your ambient conditions. — tap left button after confirming engine is off |
| FA20 | FA20 | Engine selection. FA20 is only option. |
Reading and Clearing Codes
For version 2.1 and higher there is a Clr.C option in the config menu, use this to clear codes!
To read codes, simply start your car. If you have a code, the gauge will read it back to you. If you have multiple codes the gauge will read off all codes. For a definition of codes, please check here.
To clear codes on OLDER versions of the gauge, once again turn the car completely OFF, while the gauge is off, HOLD BOTH BUTTONS, and then start the car. The gauge will say “hold” to confirm that you want to clear you must continue to hold for several seconds and then the gauge will read “CLRD” and the codes will be cleared.
Setting up the Optional Analog Inputs
Your gauge has 3 linear analog inputs, 2 of which can be used as universal displays for ANY 0-5v sensor. Do not hook up a device that sends more than 5 volts or you WILL damage your gauge.
To enable an analog input, enter the config menu and set the A1 input to Y for yes. After doing this, 3 new options will appear.
A1.DP, analog 1 decimal points. The gauge will show 9999 on the screen, and tapping the first button will move the decimal point. A1.Lo, analog 1 Low volt, or Ov reading, which the gauge will show when it sees ZERO volts on the input. -999 through 9999 A1.Hi, analog 1 High volts, or 5v reading, which the gauge will show when it sees FIVE volts on the input. -999 through 9999 A1.bL and A1.bH, limits of the bargraph for that input. L is the bargraph start, H is the bargraph end.
Simply set the values for the 0v and 5v readings of your attached sensor, as well as the number of decimal points, and the gauge will interpolate anything between 0 and 5v to the proper display.
EXAMPLE CONFIGURATION – LC-1 AFR Controller:
According to the LC-1 wideband controller documentation, Analog output 2 is the 0-5v output. By default it is 0V = 7.35 AFR and 5V = 22.39 AFR . To configure our gauge to show this on the first analog input, we would use the following settings:
A1.DP,
2 decimal points, 99.99
A1.Lo, 7.35
A1.Hi, 22.39
A1.bL 7.35
A1.bH 22.39
After putting these settings onto the analog input, the gauge will show proper AFR displayed in the Analog 1 gauge mode.