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More ABS / brake weirdness V70-XC70 2004

Long history of seemingly ABS related troubles. recently Mary was cruising down a hill to a stop (on dry roads) and found that the brakes did not appear to work. 'It wasn't the little zzt, zzt, zzt like the ABS was working it was bigger, Uhh, Uhh, Uhh, like tightening a belt.' Anyway, she got the car stopped, but was unhappy with the brake performance. The ABS light had been on for some time previous to this.

While I was changing the oil I checked each of the wheel sensor and came up with between 15 and 25 ohms each on my analog meter. The ABS light was on upon start up, but went out at about 15 MPH.

Today Mary drives the car and she notes:
(ABS) Light off after you messed w/ sensors. All OK for a while ( a day). The light came on. Ran and braked okay for a mile. Stopped for 1 hour. Got in and ABS light out. And 2nd stop sign, brakes were bad (not stopping the car). Left stop sign and tach went up and car wouldn't shift. The ABS light came back on and it shifted. Brakes now OK again. There is a ticking noise, seems to come from wheels, can't tell front or back.

The connector to the ABS modulator is very clean and latches tight. Has anyone seen ABS module failures on the P2 cars like what showed up in the late '90s cars ? Anyone had a P2 modulator apart and looked at the circuit board ?

Ideas ? Mary won't drive the car anymore. It may be time to see the dealer for a scam er scan.

Greg







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New More ABS / brake weirdness [V70-XC70][2004]
posted by  riverbend subscriber  on Tue Jun 3 21:26 CST 2014 >


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