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Old 22-12-2010, 08:48 PM   #1
ThePistonHead
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Default Warning light on cluster "((!))" after brake flush

Looked it up in the book and it said it is because of a possible brake system failure or something.

I only bled the back two wheels (lost my spanner) and took it for a spin to see how it was. Got around 100m down the road and the "((!))" came on for a split second then went away. Turned it back and parked it.

Car is an AU2 (with ABS)

No loss in braking performance was evident.

Brake fluid reservoir was full.

Can someone tell me if this is normal? Similar to to oil pressure light coming on after an oil change?

If not, what is wrong?

Regards.

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Old 22-12-2010, 09:22 PM   #2
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Check the fluid level. If that's ok some times the float in side the reservoir gets stuck in the empty position and reds empty even though it's full.
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Old 22-12-2010, 10:06 PM   #3
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Quote:
Originally Posted by Beer Baron
Check the fluid level. If that's ok some times the float in side the reservoir gets stuck in the empty position and reds empty even though it's full.
Yep it's full as i said in the OP.

Where is the float? I didn't see anything when i emptied the old fluid out?
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Old 22-12-2010, 10:18 PM   #4
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The warning light is activated by pressure sensor not a float.

If the pressure in the system falls below the threshhold while the pedal is depressed then the light comes on. In your case it probably means there was some residual air in the caliper and this caused the sudden drop in pressure but immediately cleared itself so no harm done.

Just do another quick bleed on both calipers as a safety check and all should be good.
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Old 22-12-2010, 10:59 PM   #5
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Quote:
Originally Posted by T3man
The warning light is activated by pressure sensor not a float.

If the pressure in the system falls below the threshhold while the pedal is depressed then the light comes on. In your case it probably means there was some residual air in the caliper and this caused the sudden drop in pressure but immediately cleared itself so no harm done.

Just do another quick bleed on both calipers as a safety check and all should be good.
Ahh i see. So if there was a serious issue (complete loss of pressure) would i be right in assuming the light would remain on?
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Old 22-12-2010, 11:01 PM   #6
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mine come on for a few seconds on a first test drive after replacing the front rotors... i wouldn't worry about it. i decided it was just the brake pads moving back into position (a few mm away from the rotors)
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Old 22-12-2010, 11:35 PM   #7
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Quote:
Originally Posted by ThePistonHead
Ahh i see. So if there was a serious issue (complete loss of pressure) would i be right in assuming the light would remain on?
Correct. You would also notice a very sudden change in brake pedal feel! LOL.
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Old 25-12-2010, 10:13 PM   #8
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Quote:
Originally Posted by T3man
Just do another quick bleed on both calipers as a safety check and all should be good.
He cant do that. He lost the spanner, remember
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