Actually, what happens is the measurement of rotation becomes different
because one rotation of the front wheel would be different than the expected
rotation of the exciter wheel at the differential. That difference would
occur if all four wheels were the same size, but way different than what the
CABS was configured. Now, speaking of front wheel differences, if you were
to have humongous Captain America wheels on the rear and the size in the
front remained stock you probably would fool the system.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net]On Behalf Of
jon@dakota-truck.net
Sent: Thursday, August 01, 2002 10:01 PM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: RE: Re: RE: RE: Need ABS and check engine help!!!
"Ronald Wong" <ron-wong@cox.net> wrote:
: My apologies to all. Because various individuals have been stating that
off
: the beaten path wheel diameters have caused trouble codes I decided to
: investigate further. You folks are absolutely right! If you go to far
off
: the beaten path the PCM does detect the difference. Smart a$$ little
: device. There are speed sensors for the front wheels as well and
: information from the front wheel sensors is input to the PCM which does a
: number of comparisons over a set time and determines if the rotations it
: sees from the front wheels matches what it is expecting from the rear
wheel
: speed sensor. If they don't match or come close it DOES indeed throw a
: code.
Wouldn't the above situation only cause a code if someone were to
change the diameter of the rears without also changing the fronts?
Seems like if someone was just getting bigger wheels, for example
going from 31s to 33s, they generally change out all 4, and as far
as the computer is concerned, it just looks like the person started
driving around at 52mph all the time instead of 55...
---Jon-
.---- Jon Steiger ------ jon@dakota-truck.net or jon@jonsteiger.com -----. | I'm the: AOPA, DoD, EAA, NMA, NRA, SPA, USUA. Rec & UL Pilot - SEL | | '70 Barracuda, '92 Ram 4x4, '96 Dakota, '96 Intruder 1400, '96 FireFly | `----------------------------------------- http://www.jonsteiger.com ----'
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