Ford Puma - 01 1.7 Warning lights: Motoring Technical Car/Motor Issues forum

Technical Car/Motor Issues > Ford Puma - 01 1.7 Warning lights	Miscellaneous
Thread Author: J Bonington Jagworth	Replies: 7

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Sat 1 Sep 12 13:53

Ford Puma - 01 1.7 Warning lights - J Bonington Jagworth

My daughter's otherwise trusty Puma is showing its ABS and traction control lights, despite having been given a clear bill of health on both counts (by National Tyre, admittedly).

I haven't tried it myself yet, but I guess it would easy enough to establish if the mechanisms were working, which would leave the behaviour of the lights, e.g. a broken wire down by the brake sensor. Any other thoughts welcome...

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Sat 1 Sep 12 13:57

Ford Puma - 01 1.7 Warning lights - Zero

Alternator is a possibility, as low voltage + spikes can cause it.

Abs and traction control use the same sensors, so they are a favourite.

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Sat 1 Sep 12 14:04

Ford Puma - 01 1.7 Warning lights - J Bonington Jagworth

Thanks, Zero. I expect the battery's a bit tired by now, too!

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Sat 1 Sep 12 16:49

Ford Puma - 01 1.7 Warning lights - carmalade

With the warning lights on,there is most definitely a problem.The garage suggestion of a "clean bill of health" is absolute rubbish.As previously posted,more than likely to be a speed sensor fault.Usually a front on these.(one at each wheel)hth

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Mon 3 Sep 12 17:55

Ford Puma - 01 1.7 Warning lights - madf

Easy test with a multimeter.

Unplug one front sensor from the main harness : connections usually inside engine compartment. Probe the wheels ends. Rotate wheel. Set meter to resistance

Zero reading means sensor has failed.
Infinite reading means broken wire.

Correct reading a few hundred micro ohms.

Usually the passenger side front goes due to much and water.

Of course, the driveshaft ring can corrode: odd readings...

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Mon 3 Sep 12 21:24

Ford Puma - 01 1.7 Warning lights - Kevin

>Correct reading a few hundred micro ohms.

micro ohms?

Usually somewhere around 1k ohms is normal but it's easy enough to check another sensor to compare.

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Tue 4 Sep 12 09:27

Ford Puma - 01 1.7 Warning lights - sherlock47

You do not indicate when the Fail lights come on.
Either a static 'self' test on ignition ON
or
a problem detected when running.

Is it permanent or intermittent?

Add to possible causes a broken toothed ring (not sure how Ford do it) which is responsible for inducing the voltage in the sensor coil. Could be corrosion on toothed ring?

Some cars allow you to change the ring others require a complete drive shaft or hub!

passionford.com/forum/technical-help-q-and-a/279324-puma-abs-tc-problem.html

Gives some good advice a nd pictures

Last edited by: pmh on Tue 4 Sep 12 at 09:30

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Tue 4 Sep 12 09:40

Ford Puma - 01 1.7 Warning lights - DP

>> You do not indicate when the Fail lights come on.
>> Either a static 'self' test on ignition ON
>> or
>> a problem detected when running.

The system on our mk5 Fiesta Zetec-S used to do a "self-test" the first time the car reached about 10 mph after an engine start. This would consist of a slight "buzz" which could be felt briefly through the pedal box.

It would be good to know if this warning light comes on when driving, and if so is it shortly after pulling away?

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