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2004 Jaguar X-Type OBD codes P1637, P1638 & P1642

Tiny
1ILLINI
  • MEMBER
  • 2004 JAGUAR X-TYPE
  • 6 CYL
  • AWD
  • MANUAL
  • 70,000 MILES
My '04 x-type has intermittent issues causing some or all of the instrument panel to stop working. But other times everything works fine (P1111). I had the codes scanned and came up with the three codes listed in the "Subject" line. They all refer something called "CAN link", but I can't find any more of an explanation. Any suggestions or is a to visit the dealer my only option?
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Friday, February 13th, 2009 AT 12:28 PM

2 Replies

Tiny
GFIMOTORCARS
  • MECHANIC
  • 673 POSTS
These are all ECM (engine control module) communication faults with the CAN network. The CAN network is an internal communication network that allows transfer of data from one component to the next. The entire vehicle is wired in a CAN style network from the dash to the radio and so on. If there is a disruption in the signal you will have all sorts of interesting electrical issues occur because of failure on the CAN network. This is a problem that will need someone versed in Jag's electronics and someone that has the proper diagnostics to track down the problem. CAN issues can often be software related but can also be caused by component failure. I would personally recommend bringing this into the dealer. Mainly because electrical issues on Jag's can become really expensive really quick, and although a dealer may cost you more hourly they may save you money because of their access to Jag specific diagnostics.
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Friday, February 13th, 2009 AT 6:06 PM
Tiny
SLOGIN3500
  • MEMBER
  • 5 POSTS
First I would see the explanation of the fault codes. I know you have the numbers but you need to get a code discription. Like CAN network fault between the Instrumnet cluster and ECM for example. Find the description. Second you need to check resistance across the network by going to the (DLC) connector, the connector you hook the scan tool up to and go to pins 6 and pin 14, with a voltmeter and the key off you resistance should be at about 60ohms. If the resistance is really high you need to work your way down the network until you see were the resistance is not high anymore. I would take it to a Jaguar dealer if I were you. This could be a really indepth process. Give them time to diagnosis the car, don't rush them. Get it right the first time.
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Sunday, February 15th, 2009 AT 5:53 PM

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