Yup. Clearing the PCM (as in a hard reset) will flag the technician that
something is either wrong of something is being covered up.
They can easily look at the PCM and see if the Key Cycles are in a normal
range (100+) or if it was reset. The OBD-II monitors will also not work if
the key cycles are below 30 (which seriously sends a red-flag). If they
look an find something in between 0-20, that puts up a red flag (why was it
reset and they can't read any of the collected OBD-II data). What you can
do is this...reset the PCM, turn the key ON/OFF about 30 times in your
driveway (start/stop engine) and then go drive the vehicle for at least
25-30 miles...this way, the OBD-II monitors will be active and you can just
tell them that the battery died on you (had to disconnect and recharge
overnight a few days ago).
- Bernd
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
david.clement@verizon.net
Sent: Tuesday, June 14, 2005 6:07 AM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: RE: Stored Error Codes - How Long?
FWIW, here in Mass any OBD-II vehicle gets plugged in for a code check in
lue of going on the rollers for the driving cycle emisssion test. I found
out the hard way after working on a couple of family member's cars that if
you clear the codes with a scan tool immediately (with in a few days) before
going for the emission test you get turned away. Apparently a bit gets set
when you clear the codes the tool they use in the inspection stations read
this bit and will not allow the inspection to continue until the code is
cleare by x start cycles. Both family members were told to come back in a
couple of weeks.
My recomendation would be not to use the scan tool at this point.
Dave Clement
99 SLT+ CC 4x4
This archive was generated by hypermail 2b29 : Fri Jul 01 2005 - 09:48:06 EDT