Innovate Motorsports MTX-L User Manual

MTX-L

Digital Air/Fuel Ratio Gauge

User Manual

The Oxygen Sensor used in this device gets very hot in operation.
Do not touch a hot sensor. Do not let a hot sensor touch a combustible surface. Do not use the
sensor with or near flammable liquids or gases. Failure to heed these warnings may result in
severe burns, explosions, fires, or other dangerous events.

When installed in the exhaust, the oxygen sensor MUST be connected and operating with the
MTX-L whenever the car is running. An un-powered oxygen sensor can be quickly damaged
when exposed to hot exhaust gases.

Warning!

11-0129A

TABLE OF CONTENTS

1 MTX-L.......................................................................................................3

2 Installation................................................................................................4

2.1 Wiring .................................................................................................4

2.1.1 Single Innovate Device Relay Wiring Instructions.....................5

2.2 Mounting and Routing........................................................................5

2.3 Sensor Placement..............................................................................6

2.4 Sensor Calibration..............................................................................7

2.4.1 Calibration Schedule..................................................................8

2.5 Changing the MTX-L’s gauge face and/or bezel................................8

3 Download the Logworks 3 software package ..........................................8

3.1 Installing software...............................................................................9

3.2 Connecting to LM Programmer..........................................................9

3.2.1 Analog Outputs..........................................................................9

3.2.2 Advanced output programming ...............................................11

3.2.3 Updating the Firmware ............................................................11

3.3 Logging data from your MTX-L with LogWorks................................12

3.4 Customizing your fuel type...............................................................12

3.5 Customizing your display range.......................................................13

4 Wiring Analog Outputs...........................................................................14

Appendix A: Limited Warranty.......................................................................15

Appendix B: MTX-L Error Codes and Troubleshooting Tips.........................16

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1 MTX-L

The MTX-L is an integrated gauge and controller for wideband AFR (lambda)
measurements. Although it can be operated stand alone, it has digital I/O for
integration with other MTS compatible products and two configurable analog
outputs for integration with ECU’s and 3
views will help you get familiar with the unit.

rd

party data loggers. The following

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Installation

2.1 Wiring

The MTX-L has 5 stripped wire ends:
1 Connect the RED wire to an isolated switched 12V source in your

vehicle. A switched 12V source goes ON as soon as “key on” power is
active. The circuit to which you will pull power from should be able to
support a 3 amp draw. Make sure this connection is protected with a 5A
fuse.

Circuits that share power with the vehicle’s stereo, ignition system,
ECU, lighting, or fuel pump should not be used. When in doubt, create an
additional circuit using an automotive relay available at any automotive parts
supplier. See the next section for a relay installation diagram.

2 The BLACK wire should be grounded to a solid ground source. The

best possible ground source would be the battery ground (-) post.

If other Innovate Motorsports devices are going to be daisy-chained
along with the MTX-L, it is recommended that all devices be connected to a
single ground point, ideally the battery ground (-) post.

3 Connect the WHITE wire to a headlight power wire (a wire that supplies

current to the headlights). This enables the display to dim for better
nighttime viewing. DO NOT CONNECT THIS WIRE TO THE
HEADLIGHT DIMMING WIRE. Connection to this rheostat type of
switch will cause the gauge to malfunction. If you chose not to utilize the
dimming feature, connect the WHITE wire to ground.

4 Optionally, the YELLOW (Analog out 1) and/or BROWN (Analog out 2)

can be connected to the analog inputs of other devices such as data
loggers or ECUs. If either one or both of these wires are not being used
isolate and tape the wire(s) out of the way. The default analog outputs
are as follows: Analog output one (yellow) is 0V = 7.35 AFR and 5V =

22.39 AFR. Analog output two (brown) is 1.1V = 14 AFR and .1V = 15
AFR.

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2.1.1 Single Innovate Device Relay Wiring Instructions

2.2 Mounting and Routing

The MTX-L gauge fits in any standard 2 1/16” (52mm) gauge pod. Mounting
of the gauge should be done in such a manner that the cables are not being
forcefully pulled and strained from the gauge itself. Route the sensor cable
avoiding contact with the exhaust pipe and other hot sources that could melt
the cable. Also avoid routing the sensor cable near ignition components or
other sources of RF (radio frequency) and EMI (Electromagnetic
interference) noise.

The MTX-L gauge is splash resistant (not water proof) and can be
mounted so that it is exposed to the outdoor elements. The MTX-L should
not be submerged and special consideration should be taken to protect the
gauge from direct water spray (water coming from a pressurized source.)
When replacing the bezel and/or gauge face verify that the o-ring is properly
seated.

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