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code 1643

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  #1  
Old 09-03-2013, 10:57 PM
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Default code 1643

I have a 97 xk8 convertible I just bought. Code showing is 1000 and 1643. I have an abs light on and showing stability control failure.

I cleaned all four wheel sensors and found one broken ground wire. I fixed it and also cleaned the braided ground cable under the car. I cleaned the battery terminals and charged the battery. Cleared the codes.

Drove it for about 20 minutes with no lights showing, no codes showing and all seemed well. Then I stopped, put it in reverse and the abs light came back on and the stability control failure reappeared. I cannot clear the codes. Other than codes showing seems to drive fine. Dash gauge shows voltage to be 13 volts but not sure of the accuracy. Any ideas? I am poor and lost. Should have thought about the poor part before I bought a Jaguar.
 
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Old 09-04-2013, 02:54 AM
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I've moved your post from General Tech Help section to XK8/XKR section. Members here with the same model will have plenty of advice for you on ABS.

The P1000 is not a fault code. It indicates Onboard Monitoring Tests have not been completed since last memory clear. You will always see this or P1111 - OnBoard Monitoring Tests complete.

Graham
 
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Old 09-04-2013, 05:30 AM
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Don't worry yet, there could be a really cheap fix.

After you put the car in reverse, did you make a big steering input ... like used in parallel parking for example? Is that when the warning appeared?
 
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Old 09-04-2013, 05:42 AM
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Actually I may have. Dont know that for sure but where I was turning that could be the case.
 
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Old 09-04-2013, 06:49 AM
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Reason I ask is that there are a few things that can go wrong that will often show up when a big steering input is made.

The sections of wiring connecting to the front sensors ... these have to flex as steering is turned left or right. If there is ...
- a broken wire
- a marginal contact in a connector
- a wiring section strapped down in such a way as to stress it when a steering input happens ...
then you may get an ABS / TRAC warning at that time. (The warning will stay there at least until the next time you start the car.)

First thing I would try is to clean and re-seat the connectors. This can be done without removing road wheels if I remember right. Then maybe inspect the way the wiring is strapped down and re-do this if it gets stressed near steering lock, building in some slack.

If no joy, we can move on to some electrical tests that look for intermittent connectivity.

Good luck.
 

Last edited by Dennis07; 09-04-2013 at 06:50 AM. Reason: typos
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Old 09-04-2013, 07:04 AM
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+1 to Dennis' advice.

And BTW, P1000 is not a trouble code, it just means you have reset the codes and the emissions self-test have not completed.

I also would not worry about P1643 alone (an internal network communications error) unless it is coupled with another problem code.
 
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