TRACS/ABS: - TRACS pressure switch location?

Tension · Oct 6th, 2013, 11:25

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!

Hasse53 · Oct 6th, 2013, 12:20

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.

Tension · Oct 6th, 2013, 14:53

http://www.volvopartswebstore.com/sh...ssembly=242491

Thanks very much. Could you tell me where on this diagram it is?

Hasse53 · Oct 6th, 2013, 15:34

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...........

Tension · Oct 6th, 2013, 16:34

Aaah...

My car doesn't have a switch there :/

Hasse53 · Oct 6th, 2013, 22:41

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

Tension · Oct 6th, 2013, 23:43

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...

acshortt5 · Oct 6th, 2013, 23:57

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.

PNuT · Oct 7th, 2013, 05:54

Quote:

Originally Posted by acshortt5

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.

I knew that.....

I also know that tracs doesn't work like most people think it should

Tension · Oct 7th, 2013, 11:30

Quote:

Originally Posted by acshortt5

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.

You do know that you are wrong?

Oct 6th, 2013, 11:25	#1
Tension Senior Member Last Online: Mar 22nd, 2015 22:53 Join Date: Jul 2009 Location: Bangor NI	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! __________________ 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, 14:53	#3
Tension Senior Member Last Online: Mar 22nd, 2015 22:53 Join Date: Jul 2009 Location: Bangor NI	http://www.volvopartswebstore.com/sh...ssembly=242491 Thanks very much. Could you tell me where on this diagram it is? __________________ 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
Hasse53 Member Last Online: Jun 27th, 2022 21:50 Join Date: Apr 2013 Location: Karlstad	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.

Oct 6th, 2013, 16:34	#5
Tension Senior Member Last Online: Mar 22nd, 2015 22:53 Join Date: Jul 2009 Location: Bangor NI	Aaah... My car doesn't have a switch there :/ __________________ 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, 23:43	#7
Tension Senior Member Last Online: Mar 22nd, 2015 22:53 Join Date: Jul 2009 Location: Bangor NI	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... __________________ 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
Hasse53 Member Last Online: Jun 27th, 2022 21:50 Join Date: Apr 2013 Location: Karlstad	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.

Oct 6th, 2013, 22:41	#6
Hasse53 Member Last Online: Jun 27th, 2022 21:50 Join Date: Apr 2013 Location: Karlstad	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

Oct 6th, 2013, 23:57	#8
acshortt5 Volvo Nutcase Last Online: Jul 14th, 2023 12:57 Join Date: May 2007 Location: N/A View Photos By: acshortt5	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. __________________ Andrew 1998 S70 T5 CD AUTO Previously a 1990 240 GLT-R

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