Lil'John

<background info>
I've put a 2004 LQ4 into a 1971 Toyota Land Cruiser. Behind the LQ4 is an NV4500 and a Toyota transfercase.

For gauges, I am using a set from a company called Haneline.

The gauges included a 3 wire VSS that they say is 8k pulse. One wire they list as a B+, one wire they list as a ground, and the last wires they list as signal.

On the 2004 LQ4, I've got a VSS low(light green/black) and a VSS high(purple/white)

I've done a search and didn't find something that was real hopeful.

Is it possible to use this VSS for my LQ4? I know that if it is usable, the PCM would need to be programmed. The programming isn't an issue since I have Jet DST.

Is it as simple as running a power wire to the b+, the ground to the VSS low, and the signal wire to the VSS high?

I'd rather not get another VSS for the PCM but will if I really have to.

The rig is running and driveable but I'd like to finish it up.

Any information would be greatly appreciated.

Lil'John

Still looking for some input... I'd hate to crawl under the car getting rained on to do it wrong

Lil'John

Any help would be greatly appreciated.

LS1MCSS

iTrader: (18)

A three wire VSS will send the wrong type of signal. You need a two wire.

garys 68

iTrader: (1)

The 3 wire is a hall effect sensor. Do a search here, they apparently dont work.
You could run a Dakota Digital pass thru for the ecu and your 3 wire for the speedo.

MikeJTR

I'm working on a 40-tooth reluctor ring vss kit for the FJ-40 transfer case. The reluctor ring fits on the shaft on the backside of the transfer case.

I originally made one about ten years ago, and gave the design to Downey offroad. At the time, I didn't have the equipment to make the parts in production, and Downey was buying other VSS units from us. Now that Downey is out of business (and we have the equipment to make the parts), we will be producing the parts.

The parts should be ready in a couple of weeks.

Lil'John

I do recall the Downey unit and saw one installed at the shop that did a good portion of the work on my FJ55.

The problem is I am giving serious thoughts to changing cases in the "near" future so I'm hoping to exhaust speedo output methods.

Lil'John

How well would the Dakota Digital SEN-01-4160 unit work?

It is an 8k unit with only two wires.

garys 68

iTrader: (1)

I used the DD pass thru sender, solved my stalling problems. Do you want to use it to runn a speedo or cruise ontrol?

Speartech

iTrader: (14)

I don't know what type of sensors will physically fit in your transfer case, but what you really want to do is use the GM 2-wire speed sensor in the transmission/transfer case, feed that signal to the PCM, and then use the speed signal output from the PCM straight into your gauge.

You would just hook up power and ground to the gauge, and the signal wire from the PCM.

That way everything is happy because the output from the PCM is the same type signal as the 3-wire VSS (square wave).

You can then reprogram the PCM to get the signal accurate for the gauge.

Lil'John

Thank you for the reply.

It is really as simple as grounding the gauge and running the speed signal output from the PCM to the gauge? (aside from tuning)

What voltage is the speed signal output from the PCM?

Speartech

iTrader: (14)

It varies on different applications and PCM's but you can use a pull-up resistor to make it whatever you need.

Lil'John

The PCM is a 2004 Silverado HD for the LQ4. Any info you could provide would be greatly appreciated.

Speartech

iTrader: (14)

Hook it up, see if it works. It should work as is. If not, try adding a 4.7K pull-up resistor. That goes from switched ignition, thru the resistor and into the speedo wire.

MikeJTR

We have just started making a reluctor ring kit for the FJ-40, which should make things easier by using a stock gm vss.