VSS 5v DC Square wave signal

Used only on the 03/04 Marauder but can be used on any 03/04 ecu with code changes. Uses newer style SCP array so will not control cluster correctly on 2004 and older fords that use the older style SCP array such as mustangs.
ConWasabi
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Joined: 2021 Feb 15, 16:42
Location: Vista, CA
Vehicle Information: 69 Bronco w/ 89 Fox 5.0 HO, Explorer: Front Dress, gt40 heads, intake, distributorless ignition w/coil packs, 03 Vic MPC-185 & 01 f150 HD harness, [Quarterhorse, RZASA]

VSS 5v DC Square wave signal

Unread post by ConWasabi »

Can this strategy be configured to use the VSS signal from a digital speedometer?

From the manufacturer: The speedometer signal output terminal (VSS) produces a +5 volt DC Square wave signal. This signal may be able to be used as a VSS signal with some OEM and aftermarket ECM’s and cruise control units.

Currently planning to complete pre-tune checklist then become premium member.
decipha
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'19 F-150 3.3L

Re: VSS 5v DC Square wave signal

Unread post by decipha »

Im not sure if it has the hardware but you can try
ConWasabi
Posts: 14
Joined: 2021 Feb 15, 16:42
Location: Vista, CA
Vehicle Information: 69 Bronco w/ 89 Fox 5.0 HO, Explorer: Front Dress, gt40 heads, intake, distributorless ignition w/coil packs, 03 Vic MPC-185 & 01 f150 HD harness, [Quarterhorse, RZASA]

Re: VSS 5v DC Square wave signal

Unread post by ConWasabi »

I would rather go with something known to work if possible.
I have a Ford VSS that would goto pin 3 & 6 on a EEC-IV, but notice the pinout only shows one VSS+ pin on 68.
would the VSS- just goto ground and is this known to work? If not do you know what my options are?
decipha
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'19 F-150 3.3L

Re: VSS 5v DC Square wave signal

Unread post by decipha »

there should be a vss- as well

Even if it didnt work its not a big deal.

What do you need vss for?
ConWasabi
Posts: 14
Joined: 2021 Feb 15, 16:42
Location: Vista, CA
Vehicle Information: 69 Bronco w/ 89 Fox 5.0 HO, Explorer: Front Dress, gt40 heads, intake, distributorless ignition w/coil packs, 03 Vic MPC-185 & 01 f150 HD harness, [Quarterhorse, RZASA]

Re: VSS 5v DC Square wave signal

Unread post by ConWasabi »

I guess that should have been my first question.
ConWasabi
Posts: 14
Joined: 2021 Feb 15, 16:42
Location: Vista, CA
Vehicle Information: 69 Bronco w/ 89 Fox 5.0 HO, Explorer: Front Dress, gt40 heads, intake, distributorless ignition w/coil packs, 03 Vic MPC-185 & 01 f150 HD harness, [Quarterhorse, RZASA]

Re: VSS 5v DC Square wave signal

Unread post by ConWasabi »

With no OSS, using manual transmissions NV3550 / Dana 20 do I need the VSS?
decipha
Posts: 4955
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: VSS 5v DC Square wave signal

Unread post by decipha »

its not necessary its nice for dashpot decay being held on decel but not required
ConWasabi
Posts: 14
Joined: 2021 Feb 15, 16:42
Location: Vista, CA
Vehicle Information: 69 Bronco w/ 89 Fox 5.0 HO, Explorer: Front Dress, gt40 heads, intake, distributorless ignition w/coil packs, 03 Vic MPC-185 & 01 f150 HD harness, [Quarterhorse, RZASA]

Re: VSS 5v DC Square wave signal

Unread post by ConWasabi »

Further web reading suggests that pin 68 is a vss output signal after the PCM calculates MPH that is used for speedometer and cruise control (8,000 ppm). Sounds like the OSS input would be the only way to get a signal to the computer but VSS vs OSS pulse rate is significantly different.

looks like the explorer & ranger ECU has a 8000 ppm input on pin 58, fed by GEM but can be fed by only 1 wire of the vss.
decipha
Posts: 4955
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: VSS 5v DC Square wave signal

Unread post by decipha »

that is only partially correct
pin 68 is a vss OUTPUT on some ecus that use a vss output which most do not

your not looking for an out though your looking for an input

pins 33 and 58 are vss but they arent used on the luxury ecus. You can wire it up and theres a 50/50 chance of it working as the hardware may or may not be there.

However you can set the aice chip for the oss input to be vss and you can probably get that reading for ease.

Regardless in all ecus the pulse count is adjustable.
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