rankx7

hey guys i got a 93 jdm rx7 fd i got a few problems but my new one is my abs isnt working and my 4w abs light is on....jsut happened no idea how to fix it or where to look for problems...any help will be great! thanks alot also it started as on and off problem now its ALWAYS on with no abs and the light is on

AWD-RWD racer

iTrader: (5)

might have a loose sensor. my car when started does not have the light on. but as soon as i start rolling it turns on and stays on. ive looked and cant find an issue. and honestly ive never felt the "abs" work. either in the rain, snow, or dry. just feels like normal brakes to me.

gracer7-rx7

iTrader: (16)

^That is not a loose sensor. That is a bad sensor. The ABS sensor is a wheel speed sensor. So as soon as you start moving and the computer doesn't get a speed signal from the sensor, it illuminates the ABS light.

The FSM has procedures for testing the ABS sensor and troubleshooting the ABS system. Download it from the sticky in this forum and get busy.

Fritz Flynn

iTrader: (263)

As some others have mentioned it's likely a bad/misaligned sensor but it could also be the ABS ecu located in the back hatch area. In any case I have all the sensors except the front passenger side. I also have some ABS ECUs so if you can figure out what's going on I might the have the replacement part you need.

The sensor that usually goes bad is the front passenger side because the line gets cooked by the turbo.

Good luck w/ it

rankx7

and that will make u have no abs and turn the light on?

gracer7-rx7

iTrader: (16)

Yep. ABS works by being able read the speed of the individual wheels via the sensor. If the sensor or sensor line/wire or computer isn't working properly, then the light comes on and it don't work.

.....

AWD-RWD racer

iTrader: (5)

will it interfere with the basic function of the brakes? just the abs wont work, correct?

rankx7

ok so it only goes on when i start to drive...when i start it and its jsut warming up and stuff its not on only when i start drving

gabe[7]

mine did the same thing it would turn on when i drove then turn off when i stopped...then it just stayed on forever...i changed my brakes pads though and it went a way and hasn't come back...do you need a brake job?

rankx7

im gonna look into it...could a brake leak or low fluid make it come on?

rankx7

where are they wheel sensors?

gracer7-rx7

iTrader: (16)

check the FSM. Download it from the sticky in this forum.

It is on the hub. It has a thick black cable/wire going to it and is a pita to get off and not break while trying to get off. Soak in pb blaster and use some anti seize when you reinstall it.

rankx7

is there just 1 abs sensor?

jkstill

iTrader: (11)

Have you by chance recently changed the brake fluid?

Getting some air in the lines through the ABS system can cause this.

Bleeding the brakes to get all the air out will fix it if that is the case.

rankx7

no havent touched brake fluid

unwritten-dinasty

Hello, im new here, i have a 93 FD with the same problem, except my 4W ABS light is on as soon as i start the car, my mechanic checked it and said i have the front passenger side sensor gone. Can anyone help me out here on where i can get this sensor? or all 4 if possible to have them as backup?

I live in Dominican Republic (Caribbean) so dont say go to your dealearship and buy them cause Mazda here never brought the RX-7, just started bringing the RX-8 about 3 years ago. Any place i can get them online or anything?

Mahjik

iTrader: (1)

Malloy Mazda , Ray Crowe is the parts manager, gives great prices to RX-7 owners, quick shipping:
(888) 533-3400 , (703) 490-8170 , fax: (703) 490-3864 , hmkparts@aol.com

unwritten-dinasty

Thanks a lot, i really appreciate it.

Ratjar

iTrader: (1)

i have driven a friends FD which has no abs and mine which does, the difference even at 15mph is HUGE- the first thing I would do is check the sensors (wheel speed sensor)

itsquanz

For some reason my RX7 EBREAK light is on so i dont know what should i check for so Da light can turn off ?

KaiFD3S

iTrader: (37)

check your brake fluid level...make sure it is at the full point