p1638 and p1699 codes
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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.
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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!
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!
Last edited by astromorg; 12-10-2014 at 01:02 PM.
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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!
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!
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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.
#13
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.
Last edited by Geebsie; 01-31-2021 at 10:32 AM.
#14
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)
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)
#15
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)
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)
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