Another ABS Thread...Help Diagnose Please.

[06YarisRS]

I have read most of the threads here as my '08 is now suffering from ABS malfunction. I did the jumper from pin 4 to 13 and am getting this pattern of ABS blinking: 3 - 4, then 3 - 9. Then, the pattern appears to repeat in a loop. I could not find anything that alluded to this particular blinking pattern. I did removed both rear speed sensor connectors, cleaned them thoroughly and reconnected. Back when I installed the 10 mm hub spacers, I had to beat the old studs out, so hoping I didn't damage the sensor. The issue started not long after the spacer install, but went away for a while, then returned. Also, when it's wet out, the issue seems to sometimes go away, which would suggest to me a possible connection that's restored intermittently with moisture present. :iono:

Here is a link to a youtube video:

https://www.youtube.com/watch?v=c1tNLzKA9ks

Thanks very much in advance.

Finally, I have never particularly liked ABS, so I would remove the fuse if there are no harmful side effects to the car and the ABS light stays off. Of course I'd rather fix the issue but if I can't right away, I'd temporarily disable the system if it's okay to do so.

[tmontague]

You can simply pull the fuse but obviously the lights will stay on. Pull the connector, clean the contacts and then throw in some dielectric grease. If the problem come back than you'll need a new hub for the sensor and/or wire

[06YarisRS]

You can simply pull the fuse but obviously the lights will stay on. Pull the connector, clean the contacts and then throw in some dielectric grease. If the problem come back than you'll need a new hub for the sensor and/or wire

Thanks! :thumbsup: I tried resetting the DTC with the jumper in, turning the ignition on and pressing the brake pedal 8 times within 5 seconds as per service manual directions. Didn't work. I'll remove the connectors again and add some dielectric grease. I'd still like to know what the blinking sequence means though.

[06YarisRS]

I found some additional info that might help. I'll be digging my multimeter out tomorrow. I may be wrong but I will assume that the 3-4 and 3-9 blinking sequence refers to DTC C0215/34 and C1239/39 (left rear speed sensor). Anyone please correct me if my logic is flawed. Either way, I'll check the resistance and the two plug ends as well as a continuity test on the wire.

http://www.testroete.com/car/Toyota/mr2%20spyder/Repair%20Information/Repair%20Manual/05%20-%20Diagnostics/052%20-%20Anti-Lock%20Brake%20System%20-%20Circuit%20Inspection.pdf

and...

https://www.youtube.com/watch?v=nDdC7uN0EA4

[06YarisRS]

One of the pins on the wheel bearing speed sensor was corroded and broken off. So, I will order one and replace that soon. We have a press in the school shop and I'm sure the bearing is still good so no need to replace the whole thing. I inserted a pin into the connector that corresponded to the broken pin on the speed sensor and snipped it off. I plugged the connector back in, went for a drive and no longer have the MILs.

https://i.imgur.com/YugLcDj.jpg

https://i.imgur.com/vWuuBLn.jpg

https://i.imgur.com/01qMuJK.jpg