I’ve searched, and couldn’t find specific answers to my question…
BACKGROUND:
The CEL is set on my 2001 XJ8; however, my OBD-II reader shows
nothing. The reader is a Equuis. I bought it new in 2004. It
works on all the other OBD-II cars I have.
QUESTIONS:
In reply to a message from Rob in S.C. sent Tue 17 Jun 2008:
Rob:
I assume your reader is connecting and can show the status
of the ‘‘drive cycle’’ tests, although I am unfamiliar with
handheld code readers. If it indeed proves connection, and
then shows ‘‘No diagnostic trouble codes’’, I expect you have
a code from one of the other dozen or so modules on the
network in that model. My ''AutoEnginuity ‘’ software (with
Jag specific extensions) is certainly not trouble free in
that it has connection problems, can become ‘‘hung up’’, and
does not have all of the reset features I would like. It
also appears that some of the data from some of the body
modules appears to be mismapped. But, AFAIK, it is the only
‘‘mid priced’’ scanner system I know of that connects and
scans for data directly from modules other than the OBD
mandated emission information.
With regard to your first question, I BELIEVE the
communication window on my AutoEnginuity says the OBD II
generic scan on my XJ8 is done with ISO 9141 ,then switches
to CAN bus to read the Jag specific powertrain and other
modules.–
The original message included these comments:
The CEL is set on my 2001 XJ8; however, my OBD-II reader shows
nothing. The reader is a Equuis. I bought it new in 2004. It
works on all the other OBD-II cars I have.
- Why does my reader not show any codes? (I thought the CAN-OBD
- What specific reader do I need?
–
Ross - 89 XJS, 95 XJ6, 98 XJR, 02 XJ8
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In reply to a message from sparkenzap sent Tue 17 Jun 2008:
Sparky,
Thank you for your post. Yours is the first objective user
information I have seen on the AE ‘‘glitches’’. If you say overall
it’s a good value, I know I can take that to the bank: still, it is
helpful to be aware of the inherent shortcomings before making the
investment.
Ross, have your codes read with another scanner. My inderstanding
is that any CEL light will be accompanied by a ‘‘P’’ code, and that
any generic OBD II scanner will read those.
Andrew Bernstein
British Auto Care–
The original message included these comments:
network in that model. My ''AutoEnginuity ‘’ software (with
Jag specific extensions) is certainly not trouble free in
that it has connection problems, can become ‘‘hung up’’, and
does not have all of the reset features I would like. It
also appears that some of the data from some of the body
modules appears to be mismapped. But, AFAIK, it is the only
‘‘mid priced’’ scanner system I know of that connects and
scans for data directly from modules other than the OBD
mandated emission information.The CEL is set on my 2001 XJ8; however, my OBD-II reader shows
nothing. The reader is a Equuis. I bought it new in 2004. It
–
JagtechOhio
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In reply to a message from JagtechOhio sent Tue 17 Jun 2008:
Andrew:
I wondered what you used for diagnostics. I have tried most
of the freeware ELM software, ProScan, the high end EASE
software, as well as AutoEnginuity. There is no doubt that
AutoEnginuity with the Jaguar extensions is the most useful
of the bunch on my three X300 series cars, although it is
significantly more expensive than any of the ELM interface
packages.
I sure wish I knew someone with the Jag software to hack the
fuel mapping reset and the O2 reorientation commands.–
Ross - 89 XJS, 95 XJ6, 98 XJR, 02 XJ8
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In reply to a message from sparkenzap sent Tue 17 Jun 2008:
Have you tried checking for codes with the engine running? My ELM
327 setup only registers codes and (obviously) live data with the
engine running.
Paul–
Turblo, 2000XJR8 , 1994XJ40 , 1987XJS.
abingdon, oxfordshire, United Kingdom
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In reply to a message from turblo sent Tue 17 Jun 2008:
A bit more info…
After cleearing the CEL, the reader started working. I drove it
to work with the reader hooked up. It logged a P0171 (Lean - left
bank), and a P0174 (Lean - Right bank). The CEL was off when these
codes appeared.
When the CEL and ‘‘Restricted performance’’ lights set, the reader
stopped working. It stopped showing any sensors being poled. It
atopped showing the codes set earlier. It only displays a
single ‘‘0’’, that it’s receiving power from the car, and is linked
to the OBD system. The ‘‘Restricted Performance’’ cleared after
about 15 seconds, but the reader was still stalled.–
The original message included these comments:
Have you tried checking for codes with the engine running? My ELM
327 setup only registers codes and (obviously) live data with the
engine running.
Paul
–
2001 XJ8
Camden, S.C., United States
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In reply to a message from Rob in S.C. sent Tue 17 Jun 2008:
Rob:
That sounds like the communication has hung up. I haven’t
looked into the exact protocol, but I do know that the OBDII
interface can ‘‘hang up’’ on any of the scan tools I have used
-without showing a time out. That annoys me a lot since in
my line of work, industrial automation, good interfaces have
heartbeats and so on. You might try a different scanner, or
try to diagnose based on the lean codes you have.–
Ross - 89 XJS, 95 XJ6, 98 XJR, 02 XJ8
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In reply to a message from Rob in S.C. sent Tue 17 Jun 2008:
Greetings Rob,
Check for vacuum leak sources from damage to the following
components:
Full load breather pipe, RH cam cover.
Air inlet duct hose to throttle body.
Part load breather pipe, LH cam cover to throttle body.
If you find no joy, remove and clean your Mass Air Flow sensor with
CRC MAF cleaner.
Like I said, use another scanner.
The first time I road tested an XJ8 with my brandy new generic
scanner hooked up, after 15 minutes the car lost CAN signal and
went into limp home mode. Rinse and repeat. Fistfull o’ codes. My
first assumption was that the car was freaking out, but of course
it was fine once I drove it without the scanner connected.
That scanner will always pull and clear most P codes, but I use my
WDS to double-check for the full story. I think the proprietary
equiptment is the only way to be certain that car and operator are
in complete communication. When I can keep it working, that is…
Zappy, I’m FAR below you on the electronics learning curve (or
wavelength ?), but I can still appreciate your product evaluations.
Any plans of augmenting my equipment with alternate interfaces will
be a waste, unless I pony up for IDS. Thanks again!
Andrew Bernstein
British Auto Care–
The original message included these comments:
After cleearing the CEL, the reader started working. I drove it
to work with the reader hooked up. It logged a P0171 (Lean - left
bank), and a P0174 (Lean - Right bank). The CEL was off when these
codes appeared.
2001 XJ8
Camden, S.C., United States
–
JagtechOhio
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In reply to a message from JagtechOhio sent Wed 18 Jun 2008:
Update:
I called the company that makes my reader. They confirmed I do not
have a CAN-OBDII reader. They also confirmed this is not the
problem. CAN-OBDII did not start showing up until '03. (My Jag
is an '01.) All they could suggest to resolve my code reader issue
was mail it back, and they’d check it out. They also offered to
give me a discount on a new, improved reader if I want to trade
mine in.
As for the car, I could find no vacuum leaks. But thoroughly
cleaning the MAF appears to have done the trick. It’s been three
days, and I have not seen any codes getting stored.–
The original message included these comments:
If you find no joy, remove and clean your Mass Air Flow sensor with
CRC MAF cleaner.
–
2001 XJ8
Camden, S.C., United States
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