MS2-Extra TFI Manual
Only for use with the MS2-Extra code (HC9S12C64 based microprocessor - MS2 Daughter Board)
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NOTE: Please ensure you have one of these daughter boards inside your ECU before continuing. If you have a black microprocessor, then you have an MS1 and these manuals are NOT for MS1 see here for MS1-Extra Manuals
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All of these instructions / diagrams are to be used at your own risk, like most things there is more than one way to do the same thing, what we have tried to do is to offer a method that we have tested or that others have tested for us. No warranty expressed or implied.
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Main Index of MS2-Extra Manuals
Layout of Components -- Suggested Supply points
Ford Thick Film Integrated IV Ignition Systems (TFI)
MS Input Wiring -- MS Output Wiring -- TFI Schematic -- Settings
There are a number of variants of TFI
- 4 cylinder, 6 cylinder and 8 cylinder
- "signature" or normal vanes. (The signature ones have one short vane and one long gap.)
- "Push Start" or "Computer Controlled Dwell" (CCD)
Here is the pinout of a typical dizzy mounted module, consult you Haynes manual if necessary.
Board Mods - input side
The input side on the MS board is fairly straightforward, most boards will need no changes.
For all boards you connect the TFI PIP wire to the Megasquirt TACH input which is DB37 pin 24.
Input Mods: See also the TFI Output mods drawings HERE
V3.0 PCB ONLY:
V2.2 PCB ONLY:
NOTE!! If you are using an aftermarket
spark box like MSD you can skip the special circuit and use a regular
"LED17" spark output. See the MSD Output Wiring under HERE.
If you do this you must also configure your spark type as Basic Trigger
When using the TFI module to drive the coil carry out the following: (NOT for an MSD)
V3.0 PCB ONLY:
V2.2 PCB ONLY:
Wiring the TFI Module
Microsquirt V3 Wiring
For Microsquirt, no internal modifications are required.
Connect the 'PIP' signal to VR1-. Leave VR1+ unconnected and tape it up. See here.
Set the Spark Output to 'WLED' in the software.
Install a 1k (1/4W) resistor between WLED and 12V. Connected WLED to 'SPOUT' on the TFI module.
The Spark Output must be set to Going High (Inverted) and use D14 for the Spark A output pin so the above drawings apply.
In a future release there will be support for signature PIP mode, but to use one of these now, use basic trigger mode with the 10 degree Trigger Angle triggering off the even edge of the vanes.
In More Ignition Options select the output so its a Fixed Duty of 50%
Suggested points for Supplies inside the V3.0 ECU
Pull up circuit diagram
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No part of this manual may be reproduced or changed without written permission from James Murray, Ken Culver and Philip Ringwood.