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#1
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ABS Light
1988 260E
A couple weeks ago I noticed the ABS light was aglow on my kid's daily driver. Well, I took it for a spin but noticed the light ONLY comes on after it is started AND when the brake pedal was depressed. It will remain on until the key is turned off. Once again, after start up, when the brake pedal is depressed - *POW* - ABS light! I just replaced my OVP with a new one and was hoping upon hope it would remedy it, SRS light, and my "light bulb out" warning light. But no. Any ideas?
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
Last edited by 85 DSEL; 10-17-2016 at 09:38 PM. |
#2
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The abs system is somewhat basic. Start at the wheel speed sensors and work your way in. There are 3 total. One on each front wheel and one on the rear differential
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Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2 |
#3
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How would I go about testing them? With multi-meter?
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
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#4
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Don't quote me, but I believe they are Hall effect sensors. Trace the wire in to the engine compartment, you will find a plug. There should be a reading of " x" ohms, and when you spin a he wheel that value should fluctuate.
Someone with a service manual can chime in with the specific readings. If the abs turns on on the first press of the brake pedal I'd be looking for a broken wire, or something a bit more obvious. |
#5
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I've had this problem with my ABS before too. First, if key is turned on and before the car even starts moving, if the ABS comes on and doesn't go off, check the OVP. IF the car moves and the light comes on check the wiring from the wheel hubs (usually the front) to the plugs in the engine bay near the wheel well. Check for continuity, I forget the values, but unplug the connectors and check resistance on the actual sensor by placing one lead in the center female opening, and the other lead on the part just outside the inner opening, but still within the connector. I think its something like 1.1, at least this is the case of my 201.
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1990 190E 3.0L |
#6
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Yesterday, I installed a brand new OVP. I was disappointed that the ABS light popped on after starting it up and touching the brake pedal. I took a chance since the old OVP was possibly the original.
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
Last edited by 85 DSEL; 10-18-2016 at 08:46 AM. |
#7
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If this was my first experience of MB ownership, it's likely I'd never own another. But my other two cars before this (one of which is our DD) are/were exactly the opposite. I couldn't ask for better service from them, but not so much the story with this 260E!
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
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#8
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So far several people have ruled out the OVP as the issue and suggested tracing the wiring and finding the root-cause for the fault (the light is telling you there's a problem in the system). So far the OVP has been replaced (even though it was fine), but the wiring hasn't been checked. The car is at least 28 years old and things fail regardless of who owns them and how well they're cared for. How is this the car's fault again?
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#9
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Fronts: .85 - 2.3 Kohms Rear: .6 - 1.6 Kohms |
#10
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I've already spent more time than I'll ever recover from reading thread after thread after thread of similar symptoms for glowing lights on the dash panel. Standing by my comment that I would likely not own another MB IF I HADN'T HAD SUCH GOOD FORTUNE WITH TWO PREVIOUSLY ACQUIRED CARS.
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
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#11
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Thank you for this info, when I have the time to get into it, I'm sure it will prove useful.
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Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
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#12
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Another thing you should do is pull the sensors from the hubs and clean the tips. Because they are magnetic, they tend to pick up iron filings and metallic debris, which screws up the system.
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#13
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Quote:
Bottom line is that you should get some reading of resistance when tested. Likely one of them is very dirty, or an obvious broken wire. Should be pretty easy to track down.
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Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2 |
#14
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Quote:
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1990 190E 3.0L |
#15
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But I agree, remove the sensors and clean them off, that would be my first step as it's incredibly easy and should be done as regular maintenance.
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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon. |
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