ABS and E-brake lights on - where are the ABS sensors?
- Thread starter Veik
- Start date
CheeseHelmet
Member
There's one sensor per wheel, they're located right near the hub (look for the ring gear).
I had luck by simply cleaning debris off the sensor that was giving me trouble. There's a procedure in the service manual which describes how to get the ABS computer to blink out the trouble code. That will tell you which sensor is giving you trouble.
I had luck by simply cleaning debris off the sensor that was giving me trouble. There's a procedure in the service manual which describes how to get the ABS computer to blink out the trouble code. That will tell you which sensor is giving you trouble.
- :
- 2010 Mazda5 GT
Is that the price from onlinemazdaparts.com? Here's their prices:
http://www.trademotion.com/partloca...tege&year=2003&catalogid=1&displayCatalogid=0
Left rear is $85.89 + shipping ($7.50 if total is under $150).
http://www.trademotion.com/partloca...tege&year=2003&catalogid=1&displayCatalogid=0
Left rear is $85.89 + shipping ($7.50 if total is under $150).
CheeseHelmet
Member
Did you get that code yourself, or at the dealer?
I ask because C1234 is for the right front wheel speed sensor, not rear left. Each of the "input signal missing" codes begins with 4 long pulses followed by a variable number of short pulses. The short pulses let you know which wheel speed sensor is malfunctioning. Here's the short pulse count to wheel mapping:
If I were you I wouldn't rush out to buy a new sensor. First you should check that there's a connection from the sensor to the ABS module (located on the driver's side of the engine bay at the bottom). Use a multimeter to see if there's a resistance between the pins for the effected sensor (the service manual has all the info required for this test). If there is a connection, switch the meter to measure DC volts and spin the wheel as quick as you can while watching the voltage readout. If it's below spec the sensor could simply be dirty.
The simplest fix would be to unbolt the sensor, and clean it and the ring gear with a wire brush. Then reset the ABS computer (see service manual) and see if the code comes back.
I ask because C1234 is for the right front wheel speed sensor, not rear left. Each of the "input signal missing" codes begins with 4 long pulses followed by a variable number of short pulses. The short pulses let you know which wheel speed sensor is malfunctioning. Here's the short pulse count to wheel mapping:
- 5: Right Front
- 6: Left Front
- 7: Right Rear
- 8: Left Rear
If I were you I wouldn't rush out to buy a new sensor. First you should check that there's a connection from the sensor to the ABS module (located on the driver's side of the engine bay at the bottom). Use a multimeter to see if there's a resistance between the pins for the effected sensor (the service manual has all the info required for this test). If there is a connection, switch the meter to measure DC volts and spin the wheel as quick as you can while watching the voltage readout. If it's below spec the sensor could simply be dirty.
The simplest fix would be to unbolt the sensor, and clean it and the ring gear with a wire brush. Then reset the ABS computer (see service manual) and see if the code comes back.
Was it a pain to replace them?
Where do i start on plastic/mold removal INSIDE the car?
CheeseHelmet
Member
Ah, in that case it is the rear left sensor. Oddly enough, I believe that was the same sensor that was giving me trouble.
