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#773291 - 08/31/05 04:26 PM OBDII protocol for a 95 Town Car.
JohnT70 Offline
Climber

Registered: 08/12/04
Posts: 596
Loc: New York
Well my CEL finally came on and I did a search for scan tools and procedures to fix it. No one in town reads codes for free. No one thinks a 95 car has OBDII. No one is sure they can do anything about it. So, I did a little research and found the 3 basic protocols for OBDII.
1. PWM is the Ford protocol
2. VPW is the GM protocol
3. ISO is the Chrysler and foreign protocol
However, based on the required pins in the connector, does the 95 TC support both PWM and ISO? Anyone with further info, please come in.


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#773292 - 08/31/05 04:28 PM Re: OBDII protocol for a 95 Town Car.
GhostRider Offline

Posting Addict

Registered: 04/14/03
Posts: 15121
Loc: (Area of) Columbus, Ohio USA
AutoZone read the code for free. Did you try them?
_________________________
-Tim

1997 Ford Crown Victoria Police Interceptor (12-23-02 to 11-21-07)
2006 Ford Crown Victoria Police Interceptor (7-11-07 to 8-31-13)
2013 Ford Taurus Limited (8-31-13 to Present)

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#773293 - 08/31/05 04:30 PM Re: OBDII protocol for a 95 Town Car.
JohnT70 Offline
Climber

Registered: 08/12/04
Posts: 596
Loc: New York
Closest Autozone is 50+ miles away.

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#773294 - 08/31/05 04:35 PM Re: OBDII protocol for a 95 Town Car.
Big_Bad_Joe Offline

Poobah

Registered: 12/12/01
Posts: 8468
Loc: Rochester NY
95's are OBD-I

haynes or chilton manuals will explain how to read codes using the CEL light IIRC

thats your answer... otherwise a trip to a dealer...

where in NY are you 50 miles from an autoparts store ????

_________________________
2006 LX with HPPBlue, Light Camel Interior,Magnaflow Exhaust,PI Zip Tube
Underdrives from ADTR.net
Pioneer AVIC X930BT Nav system, JL xD400/4amp, JL Speakers, Audiovox backup camera
Given to DG in Ohio

2013 Ford Expedition Limited EL, Pearl White

2000 HPP RESURECTION RIP 8/17/2012 died in Dayton OH

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#773295 - 08/31/05 04:44 PM Re: OBDII protocol for a 95 Town Car.
cvpi71 Offline
Mr. Kozmo
Grand Poobah

Registered: 01/28/02
Posts: 13889
Loc: member since 8/2001 lost in Ma...
Quote:

95's are OBD-I

haynes or chilton manuals will explain how to read codes using the CEL light IIRC

thats your answer... otherwise a trip to a dealer...

where in NY are you 50 miles from an autoparts store ????





95 ARE OBD-II END OF STORY!!!!!!!!

Just look uderneath the ashtray/cuphholder closest to the driver side and you will see the port. If you have to go to autozone and to have the codes pulled tell them it's a 96 because there computer database have them as ODB-I they will assume it's OBD-I and won't read the codes for you.
_________________________

R.I.P Elfy 6/06
97 PI

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#773296 - 08/31/05 04:45 PM Re: OBDII protocol for a 95 Town Car.
Bangster Offline

Poobah

Registered: 11/30/01
Posts: 9397
Loc: Tucson Az
95 is OBD-II, if you can find someone who can scan it, tell then it is a 1996 if that is what it takes to get them to look at it.
_________________________
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#773297 - 08/31/05 04:48 PM Re: OBDII protocol for a 95 Town Car.
Bangster Offline

Poobah

Registered: 11/30/01
Posts: 9397
Loc: Tucson Az
Also, the one time fee for buying many low end code readers is less than almost anyone would charge to pull the codes. Harbor Freight Tools usually has one for 20 bucks, and it comes with the codes for most generic and Ford specific ones it can display.
_________________________
00 Grand Marquis LS Premium - 97 Cougar 4.6 Sport - 89 Cougar LS - 63 Falcon 302 - 82 F-150 - 97 Mark VIII LSC - 2017 Escape SE - 2012 Fusion Sport AWD

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#773298 - 08/31/05 04:52 PM Re: OBDII protocol for a 95 Town Car.
mdr46 Offline
Stranger

Registered: 07/27/05
Posts: 6
Cvpi71 and Bangster are correct.

I have a 95 Grand Marquis and I wasn't sure if it was OBD-I or OBD-II until I found the port under the dash and the 4 O2 sensors on the catalytic convertors (2 sensors in front of the cats and 2 behind).

Do a search on scan tools and you'll find that there are some available to read OBD-II error codes.

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#773299 - 08/31/05 05:08 PM Re: OBDII protocol for a 95 Town Car.
JohnT70 Offline
Climber

Registered: 08/12/04
Posts: 596
Loc: New York
Well, we do have auto stores, but they don't read codes. I know it is OBDII because it has the correct connector. My EVTM has the picture and pin-out diagram of the "Data Link Port" and it is without question OBDII. I am looking at scanners and code readers and I am interested in one called ProScan (on E-Bay). The site lists the 3 protocols with Ford being PWM. So, to use this scanner, you need that interface. My connector pins support that protocol. However, the pin-out also has the correct pin-out for the ISO protocol (International Standard). My question is will both protocols work?

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#773300 - 08/31/05 06:52 PM Re: OBDII protocol for a 95 Town Car.
Raptor9458 Offline

Over the Hill

Registered: 04/19/04
Posts: 4994
Loc: Chicagoland
Quote:

Also, the one time fee for buying many low end code readers is less than almost anyone would charge to pull the codes. Harbor Freight Tools usually has one for 20 bucks, and it comes with the codes for most generic and Ford specific ones it can display.




Do they have a website or something? I've never found one around here anywhere near that cheap unless it was an OBD-I "reader."
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#773301 - 08/31/05 06:59 PM Re: OBDII protocol for a 95 Town Car.
Raptor9458 Offline

Over the Hill

Registered: 04/19/04
Posts: 4994
Loc: Chicagoland
Quote:

Quote:

Also, the one time fee for buying many low end code readers is less than almost anyone would charge to pull the codes. Harbor Freight Tools usually has one for 20 bucks, and it comes with the codes for most generic and Ford specific ones it can display.




Do they have a website or something? I've never found one around here anywhere near that cheap unless it was an OBD-I "reader."




Nevermind, I found 'em.

LINK
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#773302 - 08/31/05 07:17 PM Re: OBDII protocol for a 95 Town Car.
cvpi71 Offline
Mr. Kozmo
Grand Poobah

Registered: 01/28/02
Posts: 13889
Loc: member since 8/2001 lost in Ma...
sign up for their catalog, sometimes they have some special price or discount on some of the selected items. I've got 2 or 3 of the Harbor freight Creader for everyone of my car. I only found 2 left. One time I got it for $25 shipped.
_________________________

R.I.P Elfy 6/06
97 PI

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#773303 - 08/31/05 08:19 PM Re: OBDII protocol for a 95 Town Car.
Steve83 Offline

Poobah

Registered: 10/03/04
Posts: 7454
Loc: Memphis, TN 38060, USA, Earth,...
I'll be looking for a ScanGauge for my car this holiday season.

I don't know what "PWM" is - Ford networks are ISO9141, CAN (Controller Area Network), SCP (Standard Corporate Protocol), ACP (Audio Control Protocol), & UBP (UART-Based Protocol). Aftermarket scanners probably ONLY communicate on ISO & CAN. Maybe SCP, too. ACP isn't connected to the OBD-II port.

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Walk softly & carry a BIG SIX ! ! !

. . .

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#773304 - 09/01/05 02:54 AM Re: OBDII protocol for a 95 Town Car.
JohnT70 Offline
Climber

Registered: 08/12/04
Posts: 596
Loc: New York
Here's the URL for the ProScan, steve. There's a little section on "determining" your protocol. Could you check it out and see if it's feasible that Fords DO have what he calls PWM protocol? Or should I go with the ISO protocol, since the pins seem to support it? Thanks for your help.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4570827633&rd=1&sspagename=STRK%3AMEWA%3AIT

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#773305 - 09/01/05 09:56 AM Re: OBDII protocol for a 95 Town Car.
Big_Bad_Joe Offline

Poobah

Registered: 12/12/01
Posts: 8468
Loc: Rochester NY
Quote:

Cvpi71 and Bangster are correct.

I have a 95 Grand Marquis and I wasn't sure if it was OBD-I or OBD-II until I found the port under the dash and the 4 O2 sensors on the catalytic convertors (2 sensors in front of the cats and 2 behind).

Do a search on scan tools and you'll find that there are some available to read OBD-II error codes.




learn something new everyday... was it all fords that year?

anyway... Actron is another decent hand held.. used that on all sorts of cars.. a little more money than some.. but works very well if you have a variety of brands in your fleet
_________________________
2006 LX with HPPBlue, Light Camel Interior,Magnaflow Exhaust,PI Zip Tube
Underdrives from ADTR.net
Pioneer AVIC X930BT Nav system, JL xD400/4amp, JL Speakers, Audiovox backup camera
Given to DG in Ohio

2013 Ford Expedition Limited EL, Pearl White

2000 HPP RESURECTION RIP 8/17/2012 died in Dayton OH

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