Quote:
Originally Posted by NOT A 45
That's great advice for any electrical problem, but in this instance you have to fully understand what the scan tool is telling you. Although all the codes set are history and not current, only one of the codes requested the light to come on. C0110 is where you need to start the diagnosis. The 2 digits following the code have meaning as well, C0110-00 means there is either a short to the pump motor or there is a open circuit/high resistance to the pump motor. The power to the pump motor comes from the relay in the ebcm, and the ebcm mounts directly to the bpmv.....there is no wiring between the 2. Armed with this knowledge we now know there are only a few possibilities.
1. There's a open or short in the pump motor windings
2. The relay in the ebcm is faulty
3. There's a problem with the power or ground going to the ebcm
4. The circuitry in the ebcm is faulty.
After verifying the integrity of the power and ground to the ebcm (which I would expect a slew of other codes to be set if this were a problem) it can only be the module or the bpmv. The diagnostic from GM actually directs you to replace the bpmv first and if the code returns replace the ebcm! Try selling that to a customer! $2500 in parts plus labor.
Because the ebcm mounts directly to the bpmv there is no way to tell which part is faulty. My advice is to start with the ebcm since you have to remove it first anyway and you don't have to fool with the brake lines. But don't be surprised if you still have to replace the bpmv as well. I've been down this road too many times that's why I sell both pieces from the start.
|
Excellent information!! You rock!
