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Old 14-03-2017   #1
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Exclamation Punto EVO ABS Failure - Hub assembly

Hi All,

My ABS has failed, MultiECU scan suggest it can be the sensor has gone, the wheel bearing has gone or there's a break in the circuit.

I have replaced the sensor with no luck and can't find a break in the wiring.

2 Questions..
  1. Does anyone have a wiring diagram so i can check the continuity between the circuits
  2. And The easiest/cheapest option would be to pick up a hub assembly.. Does anyone know whether the hubs are interchangeable from the 1.4 16v and the 1.4 8v?

Any other help would be greatly appreciated!

Cheers
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Old 14-03-2017   #2
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Re: Punto EVO ABS Failure - Hub assembly

Awkward issue.

Use ePER to compare part No.s
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Old 14-03-2017   #3
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Re: Punto EVO ABS Failure - Hub assembly

Are you able to check resistance between where the sensor plugs in at the hub end and where the wire makes contact with the ECU?

Breaks in wires are hard to see by looking alone.
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Old 15-03-2017   #4
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Re: Punto EVO ABS Failure - Hub assembly

That's what I'm hoping to do but don't have any wiring schematics, do you know where I can find some?
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Old 16-03-2017   #5
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Re: Punto EVO ABS Failure - Hub assembly

Maybe download the Grande Punto eLearn "FIAT Grande Punto eLearn.iso" and burn it to CD

https://www.fiatforum.com/downloads....downloadid=473

there is some ABS wire descriptions but no idea if they are the same for the later breed..

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Other than that have a look at the wire colours at the sensor plug end and see if you can see the same colour going into the ABS connector. sometimes they can be worked out with a bit of logical thinking
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Old 20-03-2017   #6
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Re: Punto EVO ABS Failure - Hub assembly

Thanks Louie, I managed to chase back the circuits to abs control unit.

For anyone reading this that wants to check, the Front left wheel speed sensor uses twisted pair wires, yellow and yellow with black stripe, and connects to the left hand side of the ABS control unit connector (Cant remember the pin numbers)

There was no continuity between one of the circuits and as luck would happen, I found the break about 200mm from the back of the connector.

For the first time since owning the car back in 2013, I now have no errors!!
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Old 20-03-2017   #7
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Re: Punto EVO ABS Failure - Hub assembly

Good cheap fix - thanks for letting us know it was an easy fix

Always best to rule out the easy stuff first.
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