100 series ABS alarm

[tonyc1050]

I know the ABS warning has been discusses - my alarm keeps going off yet no codes are thrown, brakes work fine, systems check out OK, and this has been going on for about 6 weeks. If I disconnect the ABS computer and leave it overnight it resets and no alarm for a few days then progressively gets to the point where it is constant - I suspect a computer failure.
Question, as I suspect it is a computer glitch is there a way to at least disable/disconnect the audible alarm as I am quite content to keep driving.

 

[D21FJ60]

any chance you're low on fluid?

 

[tonyc1050]

Checked that thanks - now isolated to either one of the wheel sensors or the deceleration mete - and have now pulled the wiring harness plug from the ABS module - I don't now have ABS - that's OK I can brake better without it as I was once a race driver - the ABS and Brake warning lights still show but no more annoying buzzer

 

[nissanh]

Does the booster motor run more than 30 seconds? If it is too long, say 40 seonds, you might need the accumulator. When accumulator is loosing the N2 pressure, the ABS might come on and the booster motor runs more than 30 seconds. If you continue to rdrive with these symptomps, you'll have to replace the booster motor as well.

 

[tonyc1050]

thanks, I'll keep an eye on that

 

[tonyc1050]

Update - yesterday and this morning the ABS and Brake lights on pretty well all the time - alarm sounding then just shuts off, sometimes in reverse - this morning took it to the auto shop for a code read and before he plugged in the alarm ceased but ABS light still on - AND, no codes at all -
realy thinking an ABS computer issue - it's probably the cheapest replacement option so running with that with fingers crossed

 

[tonyc1050]

update - tried a new / 2nd hand ABS computer - grrr - alarm still going - I just don't want to pay $thousands to find it is a minor plug/electrical issue and until it starts throwing codes then it is a blind search

 

[Biga27110]

When the booster fails to build pressure it will also beep. Check if the booster is running longer than 30 secs like Nissanh said

 

[tonyc1050]

booster is fine - max 20 second run, it appears to be an electrical issue - I just really want to know where the alarm speaker is so I can disconnect it

 

[planomateo]

booster is fine - max 20 second run, it appears to be an electrical issue - I just really want to know where the alarm speaker is so I can disconnect it

Sounds safe

 

[KFunk740]

First off, you're using techstream or similar to read codes right? A regular OBDII reader isn't going to give you the ABS codes. Nothing is going to show up.
Also, personally I'd never screw around with driving a beeping ABS unit unless I'm completely ready to ram whatever is in front of me at highway speed. I'd ust get a rebuilt abs/master/accumulator and be done with it, even its pre-emptive. I should've did that, waited until it started beeping, then had to drive home with no brakes until I got the rebuilt unit.
These things can beep and beep and give you plenty of warning. If you ignore that, that's on you man. It ain't like a booster going out on a little car. When it goes, there ain't no leg strength that's gonna stop you.

 

[Epic-Carpet]

booster is fine - max 20 second run, it appears to be an electrical issue - I just really want to know where the alarm speaker is so I can disconnect it

Were you ever able to figure out the issue? Mine was beeping on and off so I replaced the Brake Booster/Accumulator assembly with a new one and it's still doing it. I have found that if I kick the side of the Brake Pedal when its beeping it stops but then will come back shortly after usually.

 

[Felix Spain]

I have the same issue, ABS and brake lights starts blinking first, then accompanied by a beep and after a while a continuous alarm. I have rebuild the ABS module including a new accumulator (from Toyota). Before rebuild the lights and alarm also came with a sound that sounded like a fax machine. After rebuild it is just lights and alarm (no fax machine). I can't believe there are no more definite options to investigate. Hasn't anyone been through this and found a solution?

 

[Biga27110]

If you replace the master assembly you don't have to worry about it. Otherwise, you have to rebuild whatever is next in the chain. You're getting brake pressure loss somewhere. Maybe need to rebuild the slave cylinder? Bad ABS computer?

 

[Felix Spain]

thanks. I'll consider the ABS ECU too. But can blinking ABS + Brake lights + alarm indicate a problem with the save cylinder? From what I have read to far I understand that in most cases it is the ABS module (which in my case have just been rebuilt) or possibly faulty speed sensors.

 

[NOSAJ]

‘01 Lx. Mine alarms and skid light comes on only very infrequently until today. Usually only for 20 seconds or less around a curve. Brakes are good no other warning lights. Steering is normal. This morning alarm came on on the interstate with the skid light and stayed on for a long time like 3-5 minutes. It didn’t go off until I got off the exit and slowed down. I pulled the car over and turned it off. Started back up and it came back on when I got up to 30 mph. Stayed on for several minutes and then went off again when I came to a stop. Turned around to head back home and started again when I got up to 30 mph getting on the interstate. Alarm sounded for about 15 seconds then went off. Was fine the rest of the way home about a 10 minute drive. Brakes are normal. I’m going to try and figure out how to get tech stream on my Mac and will report back.

Jason