So I recently got these two codes p1638 and p1699. Does anyone know what this means? I did recently changed out the alternator because of high voltage. So thats been changed. Any ideas on what this can be? Thanks guys

 

P1638 Can Link ECM/INSTM Circuit / Network Malfunction

P1699 CAN Link ECM / Climate Control Module

 

Thanks for your reply. So exactly what does the first answer mean? And the second one. Does that mean I have to replace the climate control module?

 

I'm not a Jag tech, but I would think these are communication between module codes. Are the codes current or history? If they are history and all is working with your car, I would just note them down, clear the codes and see if they return. It could be they came on when your car lost power during the alternator swap.

 

The codes popped up recently. But the funny thing is that the car drives perfectly fine no issues. And the check engine light turns off after 20 mins or so. So im kinda stuck with this issue

 

If you can read the codes, you must have some type of reader. If car is running fine and all equipment is operating as designed, and your reader has the clear code option, I would clear the codes.

 

Im going to do that and see how far I get. Thanks for your help I appreciate it

 

Ok I noticed just now that the climate control unit screen started to blink on and off. So I'm sure it needs to be replaced. But all the buttons and functions on it work still. Any opinions?

 

Both these codes indicate a poor CAN wiring system continuity and both will light the Check Engine Light. P1638 indicates fault between the Instrument Panel and the ECU while P1699 suggests a similar fault between the Climate Control Module and the ECU.

The CAN wiring connects a number of modules and, assuming you don't have Auto Transmission, the way the wiring runs is from the Instrument Panel to the A/CCM and then on to the ECU.

You've got to hope that if the codes won't clear permanently, that all you have is a poor connection at the Instrument Panel or the A/CCM. If they're good, then check for damaged wiring. After that you may have a bad module but live in hope!

 

Thanks for your reply. The codes weren't erased so I still have the light on. As for the wiring would I have to remove the dash cluster to get to those wires? I checked all the fuses and relays and there fine. And I do have the 2.5L v6 auto trans.

 

With auto transmission, the CAN wire route is from the Inst panel, through the J Gate, through the A/CCM, through the Transmission Control Module and then to the ECU. The wires are the Yellow and Green pair.

Best to remove the centre console and also pull the A/CCM, but if you were lucky, just removing the instrument cluster might reveal a bad connection. Could be a long haul though!

 

Before you go through all that. You changed the alternator recently (because of high voltage) and the codes appeared recently. A voltage spike may have caused a problem with a module. Checking the connections as suggested by astromorg, certainly won't hurt, but I have my doubts. You need a scanner that can look at the modules, as they are in operation. My opinion only.

 

Sorry to turn the clock back by six years but how did you get on with these codes in the end? I bought my 2006 X-Type last Sunday and swapped out the original stereo for my aftermarket Pioneer on Friday. That meant taping up the now redundant fibre optics connection. Immediately after driving off with the new stereo in play the EML light came on but disappeared after I stopped and restarted the engine.

I bought a Bluetooth code reader and Torque Pro is reporting P1638 and P1699 as current faults and P1111 as a pending fault. I’m doing some digging into all of these before I am comfortable enough to delete them.

Notably the previous owner discovered after having garaged the car for the last 9 months that the battery had died and had to buy a replacement before sale, and the passenger wing repeater light had also blown and I had to replace this unit. I understand the former may at least play a part in these codes being generated.

 

Too few details!

So I'll hazard a guess that your X type hasn't got the touchscreen system and then when you removed the original stereo unit you disturbed the connections to the climate control module that is immediately above it, thus creating a break or intermittent connection in the CAN wiring.

You will always have either P1111 (Diagnostic Monitor Drives completed. Good!) or P1000 (Diagnostic Monitor Drives not completed)

 

Thanks for your reply and you’re quite correct - I had to remove the connections to the climate control module in order to change the stereo fascia, and now I think about it given I tested the stereo before reconnecting the climate control module, there was a moment when the ignition was on and the climate control module would have shown as offline / broken connection. I’ve now cleared the codes and all remains well - and I anticipate that, touch wood, that will continue to be the case.