02-20-2020, 05:37 PM
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#1
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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Too many things.... where to begin?
Hey y'all!
I took the car for a spin around the block just now; first voyage since entering the garage a couple months ago to undergo some upgrades.
ABS and PSM lights came on almost immediately. (So'd the CEL, but I think I know what that's about)
Typically, my trouble shooting begins with "what's changed?" But in this instance, the answer is "what HASN'T?"
New:
Coilovers (ride height is probably too low, more on that later)
Camber plates
Tarret sway bars and end links
Adjustable thrust bars on front
Adjustable toe links on rear
18" wheels (replacing the 17's)
Replaced transmission, too.
And, I painted the calipers, so they were dismounted and remounted.
I set the ride height about 10mm lower than spec for ROW SPORT, which I presume is M030. And then I set up some string lines and just got the alignment "in the park", as I'll be letting my race shop do a corner balance and alignment.
As I was leaving the drive, turning hard right, the left front was rubbing, and actually felt like it was "crabbing" a bit, as well. And that's about when the lights came on.
So....
Can I presume that the PSM light is on because the ABS light is on? Or vice-versa? Or are they so independent of each other that I'm looking for failures that impact both systems? For instance: if I've accidentally left one of my brake sensors unplugged (I don't think I did, but im speculating) triggering the ABS, could that ABS system off-line make the PSM light come on as well?
Any thoughts are welcome. It'll be Saturday before I can look at it again.
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02-20-2020, 07:29 PM
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#2
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
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Totally a guess but I could imagine that the ABS and PSM are linked. As for brake sensors, you don't mean the pad wear sensors do you? If you track and/or otherwise maintain your car regularly (which I'm sure you do!) you can just eliminate those and twist the wires together. Sort of like the clutch switch.
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02-20-2020, 08:25 PM
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#3
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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Quote:
Originally Posted by NewArt
Totally a guess but I could imagine that the ABS and PSM are linked. As for brake sensors, you don't mean the pad wear sensors do you? If you track and/or otherwise maintain your car regularly (which I'm sure you do!) you can just eliminate those and twist the wires together. Sort of like the clutch switch.
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I do mean the pad sensors, and yes, I've done precisely as you described. I unplugged them and the wheel sensors when I was putting the coilovers on.
I'm laying in bed worried that the rubbing I heard may've been the wire running to the sensors.... and I broke it (the "crabbing").
I'm trying to forget about it since I can't do anything till Saturday. Haha
I think first thing I'll do is connect the durametric and see what codes I've got. (I assume it'll read ABS and other chassis codes? )
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02-21-2020, 05:03 AM
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#4
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 2,918
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Quote:
Originally Posted by maytag
I do mean the pad sensors, and yes, I've done precisely as you described. I unplugged them and the wheel sensors when I was putting the coilovers on.
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OK. So you unplugged them (pad sensors). However, did you twist the wires together to complete the circuit, thus preventing the light from tripping?
__________________
1998 Porsche Boxster
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02-21-2020, 05:32 AM
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#5
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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Quote:
Originally Posted by Starter986
OK. So you unplugged them (pad sensors). However, did you twist the wires together to complete the circuit, thus preventing the light from tripping?
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Sorry, I've been unclear.
Yes, twisted wires bypassing the pad sensors. been running like that for over a year.
they are in my list of suspects only because I unplugged them (along with the wheel sensors) when I was installing the coil-overs.
I was tentatively fearing (or hoping?) that someone would tell me that there's an obvious problem with such-n-such part's compatibility with the '03 PSM. That's the biggest reason I posted all of this. Some of y'all have been down the same road and I thought there might be some ".... aaaah..... I know what this is....". Excluding that, I'll just have to roll up my sleeves. :dance:
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02-21-2020, 07:48 AM
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#6
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 2,918
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Quote:
Originally Posted by maytag
I'll just have to roll up my sleeves. :dance:
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Dude, I thought always those sleeves were up. You're always improving your car, and I bet it's awesome.
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1998 Porsche Boxster
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02-20-2020, 09:27 PM
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#7
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Racer Boy
Join Date: Sep 2015
Location: Seattle, WA
Posts: 946
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My first thought was the ABS wiring harness on one of the wheels got either disconnected or damaged. It's handy that you have a Durametric!
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02-21-2020, 03:16 AM
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#8
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Newbie
Join Date: May 2019
Location: Atlanta Area
Posts: 98
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Have you changed any of your light bulbs to LED?
Sounds like an odd question, but I had both ABS and TC dashlights come on in my 98 after installing led brake light bulbs. The system seems pretty sensitive to current draw.
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1998 Porsche Boxster Base - 2005 Volvo S60R AWD - 2003 Subaru Wrx Wagon - 2003 Jeep Wrangler Rubicon - 1992 Subaru Loyale Wagon w/4in Lift - 2004 Dodge Ram 2500
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02-21-2020, 05:31 AM
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#9
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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You can also leave them connected and wire tie they out of the way
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02-21-2020, 07:57 AM
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#10
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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So I couldn't stand it, and I took 5 minutes to hook up the durametric.
ABS code 4440. Steering angle sensor.
I think this is all about my poop-ey half-butt "it's- too- cold- out- here" alignment. The steering wheel is aimed left as I'm headed down the road.
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02-21-2020, 10:20 AM
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#11
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Motorist & Coffee Drinker
Join Date: Jul 2014
Location: Oklahoma
Posts: 3,677
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#1 Don't panic and start fixing things that aren't broken and breaking things that are good. This problem is not uncommon and happens for a variety of reasons including a lower battery voltage after the car has been in the shop for a while, or a simple burned out brake light.
Rather than re-post my favorites from the search, I'll let you take your pick:
https://www.google.com/search?client=firefox-b-1-d&q=abs+and+psm+after+sitting+porsche
I had the steering angle sensor code on my '04, and it simply reset and tested good the next time I took it out.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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02-21-2020, 02:34 PM
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#12
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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Quote:
Originally Posted by 78F350
#1 Don't panic and start fixing things that aren't broken and breaking things that are good. This problem is not uncommon and happens for a variety of reasons including a lower battery voltage after the car has been in the shop for a while, or a simple burned out brake light.
Rather than re-post my favorites from the search, I'll let you take your pick:
https://www.google.com/search?client=firefox-b-1-d&q=abs+and+psm+after+sitting+porsche
I had the steering angle sensor code on my '04, and it simply reset and tested good the next time I took it out.
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hehe, thanks. No Panic here. I'm pretty confident that a proper alignment will solve the ABS / PSM thing.
So, on to the CEL, but I'll start another thread.
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