I've had a code 1243 intermittently for about 8 months - I have always been able to clear it - Below is the troubleshooting flowchart and my results

1) measure the resistance between the pump motor ground stud and a good chassis ground.
Is the resistance within the range (0-2 ohms) I had 0 ohm's

2) Measure the resistance terminal 8 and the pump motor ground stud.
Is the resistance within the range (0.2-10 ohms) I had .6 ohm's

3) I was able to apply power to pin # 8 in the BPMV and the pump ran with no problem

4) I checked/cleaned grounds 103 and 108

5) I cleaned the BPMV ground

Are there any more checks I can do?

 

How many amps was it pulling when you applied voltage to pin 8?

 

Good question - I just hooked it up to my car battery

 

I don't know what the cutoff point is before it throws the code, somewhere in the single digits. Another members motor was pulling 10 amps when he first started massaging the motor but got it down to 4 amps and the code did not show back up for awhile. Mine was 20 amps plus (but it did spin), yes, it was toast.

I did the same steps as you did and had the same results with exception of step #2, I had 0 - .1 ohm.

 

how can you check the amps on the unit while the pump is connected to car battery ??

 

a member who was clearing the code C1243 while driving and then slamming on the brakes to activate the ABS. I know when the car is started the system turns the ABS pump on and off and if the voltage readback is not high enough the code C 1243 is set and you get the messages. Since I do not have the interface connector for the EBCM I pulled the module away from the pump section. I measured the resistance of the pump motor from pin number 8 ((from left to right) (it is the first pin on the right hand connector))to the frame ground and it was in spec according to the manual. In my job we also use different size pumps for pressure and vaccum. When a pump is new or has been rebuilt it requires some break in period. If a pump has been used and off for some period of time it will also draw more current due to sediment build up and not being exercised. With this in mind I pushed a wire into pin 8 and ran it over close to the positve post of the battery so I could exercise the pump manualy. The pump came on the first time I touched the positive post but sounded sluggish. I exercised the pump about 6 more times for about 15 to 20 seconds at a time. I put the EBCM back on the pump section cleared the codes and so far the car has been running for one week now with only one message the first day after this procedure that message cleared on the next start by itself. If you try this use a heavy gauge wire and be aware the wire may get warm as you touch the battery. The pumps on these ABS units are most likely not broken in since they hardly run during the life of the car

 

any other thoughts.....

 

You can use a Current or Amp clamp to measure current. The clamp can either be built-in or connected to the multimeter. Make sure it reads low current. You can get them that will measure down to 0.001 amps. Place the clamp around the wire connected between the battery and the pump.

 

I just had my module rebuilt. It took care of all the problems. Found a guy on e-bay who did it for $60.00 postage included. I took it off on Monday and it was returned the following Monday. Guy's name was Dave. He is always on e-bay.

 

I'm sure you are speaking of the EBCM and not the BPMV.

 

Yes, he's talking about the EBCM as the BPMV cannot be serviced, just replaced. Here is the link:
http://cgi.ebay.com/ebaymotors/DELPH...d=p3911.c0.m14

 

The EBCM repair service is ONLY for vettes that are 2001-2004