Late production 95 , S-10 , 2.2 , 5 speed - S-10 Forum
 
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post #1 of 15 Old 04-17-2019, 09:47 PM Thread Starter
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Late production 95 , S-10 , 2.2 , 5 speed

I know the answers are here some where but after searching and searching , I'm asking for your help please ? (I have owned this truck since new)
Been seeing the ses ,brake warning lights intermittently . How do I check for codes on this obd I / II half breed ?
The speedometer is wonky (new vss didn't help) .
Any info would be appreciated . Thank you .

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post #2 of 15 Old 04-17-2019, 10:16 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Welcome....someone that's had their S10 longer than me..

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post #3 of 15 Old 04-18-2019, 06:23 AM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Every body who has ever asked this question thinks they have a late 95 because it has the 96 style DLC. Almost all did. But they still run an OBD1 program in the ECM. Just can't do the old blinking light code reading.

From GM 1995 S/T Truck Service Manual-Driveability, emissions & electrical diagnosis-Section 3. Control module systems.
"...There are three unique types of control modules, and various systems used to control their operation by engine or vehicle listed in the following chart:

1. SECTION 3A Control Module System (93 PCM6).
• 2.2L (VIN 4) "S" Pickup Automatic/Manual Transmission.
• 4.3L (VIN Z) "S/T" Pickup Automatic Transmission Only.
• 4.3L (VIN W) "S/T" Pickup and Utility Automatic Transmission Only.

2. SECTION 3B Control Module System (VCM-A) (with automatic and manual transmission).
• 4.3L (VIN W) "S/T" Pickup and Utility.

3. SECTION 3C Control Module System (VCM) (with manual transmission).
• 4.3L (VIN Z) "S/T" Pickup..."



93 PCM6
DLC 12 pin (standard pinout) or 16 pin (non-standard pinout), protocol ALDL (OBDI)

Actron CP9145 is said to work on these. They are getting scarce since they haven't been made in years. Did see 1 on ebay.
https://www.ebay.com/itm/Actron-CP91...0AAOSw6w1cs5YB

Or get a Tech2.
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post #4 of 15 Old 04-18-2019, 12:26 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

While the "official" answer given above makes it sound simple, there's more to it than that.

The easiest thing to do is hook up an OBD-II code reader and try it. If it works, you get codes. If it doesn't work, it's probably ALDL on the 16 pin connector (looks like the OBD-II DLC). It won't damage the scan tool or the PCM if you hook up an OBD-II scan tool to the older ALDL connector that looks identical, it just doesn't work.

For the 4.3L VIN "W" engine, I've seen at least 5 different part numbers on the PCM, with PCMs installed in two different locations. I'd bet there are as many permutations on the tutu as well. Some are fully OBD-II. Some aren't fully OBD-II, but use the 16pin DLC and "talk" SAE J1850 protocol, so they communicate to some extent with OBD-II scan tools. Some are ALDL and use a different pin on the DLC with a different protocol (the older, slower ALDL serial protocol).

If you want to know for sure, you can look at the sticker on the upper radiator shroud. OBD-II vehicles specifically say "OBD-II Certified" in those exact words.

It's to the point now where I rarely answer questions about 1995 models because 1995's are like a box of chocolates.

If you can't light up the tires in the first three gears, you need more power.
If you can light up the tires in the first three gears, you need better tires.
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post #5 of 15 Old 04-22-2019, 05:00 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Why not go to auto parts store and let them puzzle it out? Auto Zone, Advance Auto and O'Reilly will all do free testing (your handle doesn't give location, so don't know what you're close to). Yes, they want you to walk back into store and spend your money THERE on what they diagnosed; but they should be able to figure it out. One would hope so.

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1995 S10 4cyl 2WD LS; all stock.
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post #6 of 15 Old 04-24-2019, 09:20 PM Thread Starter
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Thanks fellas , sorry for the long delay . Work and life ...
My obd II scanner will not connect and neither will the big box store's or they don't know how to use them .The ebay link above was sold , will look for one like it . Do our pcm's/ computers suffer from leaking caps , black traces on the circuit board like others of this vintage ?
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post #7 of 15 Old 04-25-2019, 01:51 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

neither of my scanners hook up to mine, either, and mine is a 98. I know there is power because the green power light flashes but nothing reads
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post #8 of 15 Old 04-25-2019, 02:06 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

On a 98 if an OBD2 scanner isn't working. Check the cigar fuse and the ground. If it's neither then it's likely a wiring issue. Have fun finding that.
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post #9 of 15 Old 04-25-2019, 04:00 PM
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I figure its wiring because everything else is good on the truck, all fuses and all accessories work fine. But, I am ok with no obd2 reader, I can live without it.

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post #10 of 15 Old 04-25-2019, 08:41 PM Thread Starter
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Re: Late production 95 , S-10 , 2.2 , 5 speed

I mis spoke , production date is 12 / 94 . If I had known about obd 1 to obd 2 (transition), I would have waited a year .
Oh well , the old girl still runs well with 280 k miles .
I'll eventually figure out why the speed o is wonky and why the brake light comes on for no reason . Thanks .
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post #11 of 15 Old 04-26-2019, 12:11 PM
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Re: Late production 95 , S-10 , 2.2 , 5 speed

280k is pretty dang good. down load a gps speedometer to your cell and use it for now? than no worries on speeding

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post #12 of 15 Old 04-26-2019, 08:43 PM Thread Starter
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Thank you sir .
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post #13 of 15 Old 04-30-2019, 02:51 PM
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My innova scanner hooked up today. Still no go on my Bluetooth reader and using the torque app and I didn't get the other plug in one out since the innova worked but mine is going now.

I will have to get the model for you but I bought it for back when I had an 02 mini cooper s. The mini guys said it was the best one and it worked great on all the cars I tried before I got the wireless reader.

Now I know that it works on the truck, I will use it instead of the Bluetooth one.

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post #14 of 15 Old 04-30-2019, 02:54 PM
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Innova 3130c is the model. Checked when I bought it on Amazon back in 2014

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post #15 of 15 Old 05-01-2019, 08:37 PM Thread Starter
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Re: Late production 95 , S-10 , 2.2 , 5 speed

Saved me some searching , thanks .
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