Abs light after rear disc change

[G. Brzęczyszczykiewicz]

Just had my rear discs changed and I'm getting an ABS light after driving. The light isn't there when I start the car, and only appears after driving for a few minutes. The brakes feel fine and the pedal feels normal, so I'm guessing it's nothing too major. Any ideas what would cause this behaviour? I would assume it's a sensor but it's weird that the fault only appears after 5-10 minutes of driving.

 

[Crayola]

Which rear discs did you use as there's 2 different amounts of teeth on ABS rings

You could have fucked it and bought Scenic ones which are 24 teeth opposed to the 48 you'll need

 

[G. Brzęczyszczykiewicz]

Which rear discs did you use as there's 2 different amounts of teeth on ABS rings

You could have fucked it and bought Scenic ones which are 24 teeth opposed to the 48 you'll need

Bought the Clio 182 ones from Kam Racing. Haven't counted the teeth but I presume they'll have sent the right ones.

 

[Crayola]

Bought the Clio 182 ones from Kam Racing. Haven't counted the teeth but I presume they'll have sent the right ones.

You'd assume so, did the shim/spacer get put back properly?

 

[JamesBryan]

Did you put the spacer behind the disc back on, so that it doesn't chew the sensor up 😅

 

[SharpyClio]

Did you put the spacer behind the disc back on, so that it doesn't chew the sensor up 😅

I was going to say this!

 

[G. Brzęczyszczykiewicz]

I'll ask, I'm 800 miles away from the car and I'm having to relay information back and forth 🤦

 

[G. Brzęczyszczykiewicz]

Spacers were put back in, and the correct way round 👍

 

[G. Brzęczyszczykiewicz]

Apparently the multimeter has been out. No idea what any of this means but I'll just paste it verbatim.

"Checked resistance of both rear sensors at 830ohms each. Rotated each wheel with volts ac selected result zero voltage but voltage meter may not be sensitive enough as smaller scale is 200 volts ac. However, both wheels registered dc volts on the 200milli volt scale. Also car indicates abs failure immediately if either wheel sensor is disconnected - suggest rear sensors are working although cannot determine how strong the sensor output voltage is."

 

[JamesBryan]

Can they code read it for you to narrow which sensor it is?

 

[G. Brzęczyszczykiewicz]

Can they code read it for you to narrow which sensor it is?

He doesn't have a code reader unfortunately. There's a Torque thing in the glovebox but they don't read ABS stuff so that's not much use either

 

[JamesBryan]

Hard to say what's happened really.

The sensor failing at the same time as doing the brakes would be too much of a coincidence. Possibly disturbed it...

Only other thing to check now is the abs ring tooth count, pretty sure it's 44 tooth on these.

 

[Crayola]

Hard to say what's happened really.

The sensor failing at the same time as doing the brakes would be too much of a coincidence. Possibly disturbed it...

Only other thing to check now is the abs ring tooth count, pretty sure it's 44 tooth on these.

Yeah 44 tooth not 48 like I said

Couldn't remember off the top of my head

 

[G. Brzęczyszczykiewicz]

If the tooth count was wrong wouldn't the fault occur as soon as the car was moved? This is taking 5-10 mins of driving for it to happen. I'm wondering if one of the wires was accidentally knocked while changing the discs and it's intermittently losing connection. Now they've been unplugged etc I'll ask him to take it for another drive and see if the fault reappears

 

[JamesBryan]

If the tooth count was wrong wouldn't the fault occur as soon as the car was moved? This is taking 5-10 mins of driving for it to happen. I'm wondering if one of the wires was accidentally knocked while changing the discs and it's intermittently losing connection. Now they've been unplugged etc I'll ask him to take it for another drive and see if the fault reappears

Yeah would normally come on straight away tbh, but worth a look.