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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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TRACS pressure switch location?Views : 2958 Replies : 32Users Viewing This Thread : |
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Oct 6th, 2013, 11:25 | #1 |
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TRACS pressure switch location?
Hi guys.
Had my T-5R for about 18 months. TRACS has never worked - as soon as I turn the switch on, the warning light on the dash lights up. ABS has always worked fine. Last week I cleared a lot of A3 ABS codes and went for a short drive to try and isolate the problem. Drove for a bit, switched TRACS on, warning light came on. Got home, and there was only one code - TRACS Pressure Switch. Tried googling this but have found nothing. Think it must be seperate to the ABS pressure switch as ny ABS has always worked fine. Any ideas how I can sort this?? Thanks folks!
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1996 850 2.5 SE Estate - wrote off 1993 850 2.0 SE Saloon - scrapped 1995 850 T-5R Estate - so far so good... |
Oct 6th, 2013, 12:20 | #2 |
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There is pressure switch located on master brake cylinder, item 7/58 in the circuit diagram. If it is activated all time, indicating that braking is ongoing, TRACS will blocked. From natural reasons TRACS must not be activated during braking. Remove the connector from the switch and by using a circuit tester while pushing the brake pedal see if the switch changes position. If not, replace the switch. Bleeding afterwards will be necessary.
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Oct 6th, 2013, 14:53 | #3 |
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http://www.volvopartswebstore.com/sh...ssembly=242491
Thanks very much. Could you tell me where on this diagram it is?
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1996 850 2.5 SE Estate - wrote off 1993 850 2.0 SE Saloon - scrapped 1995 850 T-5R Estate - so far so good... |
Oct 6th, 2013, 15:34 | #4 |
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http://forums.t5d5.org/index.php?app...attach_id=3768
I have had two GLT:s until recently but they are sold. Otherwise I could have double checked........... Last edited by Hasse53; Oct 6th, 2013 at 16:11. |
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Oct 6th, 2013, 16:34 | #5 |
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Aaah...
My car doesn't have a switch there :/
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1996 850 2.5 SE Estate - wrote off 1993 850 2.0 SE Saloon - scrapped 1995 850 T-5R Estate - so far so good... |
Oct 6th, 2013, 22:41 | #6 |
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There is a different ABS unit on a MY(modelyear) 95 compared to MY 96-98. On a MY 95 the TRACS pressure switch is integrated into the ABS hydraulic unit. Preblems can be related to corrosion in the connectors or within the hydraulic unit.
BR Hasse |
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Oct 6th, 2013, 23:43 | #7 |
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That's what I initially thought. But the only one I could find was the ABS Pressure Switch. Don't think this is malfunctioning as my ABS works fine...
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1996 850 2.5 SE Estate - wrote off 1993 850 2.0 SE Saloon - scrapped 1995 850 T-5R Estate - so far so good... |
Oct 6th, 2013, 23:57 | #8 |
Volvo Nutcase
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You do know the TRACS is on automatically every time you start the car? Pressing the button once will turn it off which is confirmed by the dash light.
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Andrew 1998 S70 T5 CD AUTO Previously a 1990 240 GLT-R |
Oct 7th, 2013, 05:54 | #9 | |
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Quote:
I also know that tracs doesn't work like most people think it should
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Oct 7th, 2013, 11:30 | #10 |
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You do know that you are wrong?
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1996 850 2.5 SE Estate - wrote off 1993 850 2.0 SE Saloon - scrapped 1995 850 T-5R Estate - so far so good... |
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