OBDII Reader for OBDI?

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Mar 7, 2018 | 08:18 AM

#16

projectSHO89

Hotshot

Joined: Jan 2004

Posts: 19,762

Likes: 1,079

From: St Louis

Quote:

the USA federal LAW.. vehicles must have OBDII.. 1/1/1996..... so 1999 must.

You forgot the exceptions.... and the vehicle under discussion in this thread falls into that category.

See post #5.

The following excerpt is from the 1999 Ford OBDII documentation that can be downloaded for free from Ford.

[QUOTE[i]]If a vehicle is not required to comply with OBD-II requirements, it utilizes an OBD-I system. OBD-I systems are
used on all over 8,500 lbs. GVWR Federal truck calibrations. With the exception of the 1996 MY carryover EEC-IV
OBD-I systems, Federal > 8,500 lbs. OBD-I vehicles use that same PCM, J1850 serial data communication link,
J1962 Data Link Connector, and PCM software as the corresponding OBD-II vehicle. The only difference is the
possible removal of the rear oxygen sensor(s), fuel tank pressure sensor, canister vent solenoid, and a different
PCM calibration.[/QUOTE] I added emphasis for key portions.

Mar 7, 2018 | 11:17 AM

#17

geekwithoutacause

Laughing Gas

Joined: Oct 2017

Posts: 922

Likes: 7

Quote:

Originally Posted by Chuck's First Ford

if you did not read the link I provided..

the USA federal LAW.. vehicles must have OBDII.. 1/1/1996..... so 1999 must.

Doesn't it exclude vehicles over 8500 gvwr ? yep it does.

Mar 17, 2018 | 06:28 PM

#18

Tom

Super Moderator

Joined: Aug 2003

Posts: 25,479

Likes: 742

From: Isanti, MN

Read this one...just because it was made after '96 and has an OBD-II port does NOT mean it's OBD-II.

https://www.ford-trucks.com/forums/5...t-come-on.html