Quote:
Originally Posted by fastfredracing
I wonder if you are getting false ABS activation , from a bad, or slightly skewed wheel speed sensor . When the abs activates, the pedal will either drop, or sometimes become incredibly firm . Get me the ABS code#, and we can probably dive deeper into this . I bet they are related .
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Thanks all.
Heading out to dinner, and my code reader is not with me at the moment I think it was ABS / BCM-0070. It's a rather generic code from mid level reader, not a VIDA-DICE level info. I will confirm tomorrow.
I've had wheel sensor codes in the past- infact, that's what I was originally hoping, but this is different code.
Also-for more info- there doesn't seem to be correlation between the brake pedal diving and the abs light. The brake pedal happens rarely, maybe 1 in 100 pedal strokes. The ABS light is off about 75% of the time. The code trips (randomly), but after a couple of miles it resets itself to off. No change in braking behavior when on- like last year- I was gunning it in the snow and it worked okay. It also seems to trip less in cold weather (which could be an illusion), which was making me hope it was power supply related to the unit. Earlier I stated it was getting 12v, but I haven't really done that. I cleaned the connections, but need to isolate the actual power feed and confirm power.
My gut hope (if they are related) is that an old school brake issue was perhaps occasionally tripping the newer school abs system, but it's more a hope based on me not wanting to mess with the ABS.
Disconnecting the ABS control module involves a bunch of brake lines which looks like it would be a challenge to bleed.