I had the standard ABS - ASC - TRAC problem on my 2000 xk8. I removed the module for repair and opened the system to do it. At that time I got a little fluid leak and air of course entered the system. While the module was out I started the car and it threw many error messages and a P1637 code. Reinstalled the module still getting the ABS fault after clearing the P1637 code. I don't have a code reader for "C" abs codes. Only error now is the P1000 as the OBD resets.

My question is as the OBD resets should I still be getting the ABS fault? Also will air in the system cause a ABS fault? I know I need to bleed the brakes. I have checked the sensors, fuses and connections and they all are OK.

 

Have you driven the car since replacing the module? If the brakes are just a little soft drive it down the road and back. The abs light should go out if the fault is corrected.

You may end up going to a foreign car specialist that can read the C codes and tell you what is wrong.

 

I have driven the car with the repaired module in place and still had the ABS - TRAC - ASC errors.

As a possible fix I disconnected the battery and let the car set over night. Hooked up the module and the battery, started the car and no error messages except ABS light. Drove a short distance and the ABS light went out!!

Problem solved. I think with 2000 Computer technology it is best to cut off the power and let the system "boot" itself and get rid of the clutter. I did not do a hard reset.

By the way the Module was repaired by Module Repair Pros out of Van Nuys California.

 

Had a similar problem. I tried soldering the typical spots on the ABS module but not sure I got it hot enough. Lights didn't come on the first time I started the car but did the second and thereafter. Going to pull and hit with some heat again. Checked impedance of sensors and they all checked out.

 

The code P1637 is for communication between the ECM and the ABS module. The correct code is C1637 and is often intermittent. NOTE: [IF] this happened after the module was rebuilt and installed, and you do a hard reset [maybe] ... I would only [suggest] that is the problem. What you can consider doing is check all powers and grounds to the module PLUG. On the ABS plug at the ABS module itself ... Using a multimeter ...
1. There should be POWER at pins 9 (brown/red), 20 (white/blue) and 25 (brown/yellow).
2. You should have GROUND at pins 8 and 24 both black wires.
3. ABS sheet is for a ground [fuse] check. I do not have the ABS pinpoint test Sheet. Sorry.