LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

ABS ecu location

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Old 08-23-09 | 05:28 PM
  #16  
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Is there an easy way to check that the wires going from the wheel sensors to the ABS unit are intact. One way I would think is to access the ABS ECU and then check for resistance by a multimeter at each port. but I was hoping there might be another way without having to get into the ABS ECU...
thanks in advance !
Old 09-10-09 | 10:11 AM
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Originally Posted by LiCelsior
Ok so here's what the abs unit looks like. I"m trying to figure which pins point to which pins in the diagram so I can test the four abs sensor wires from this point coming from the wheels.
Attached Thumbnails ABS ecu location-abs_2.jpg  
Old 12-22-09 | 09:49 AM
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any input on this ? just trying to see which pins on the diagram are the ones on the actual abs unit. thanks.
Old 12-22-09 | 10:23 AM
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ur gonna love me ..


Old 12-22-09 | 11:11 AM
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yes thankYOU ! that's awesome. will test and report back. thanks once again !
Old 12-22-09 | 03:02 PM
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anytime...
Old 01-01-10 | 04:52 PM
  #22  
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update, the diagram definitely helped. The A20 socket is what has the wires from the 4 sensors coming. word of advice, the way the diagram is made, the wires were not relating to correctly. took me a while to finally figure out that when you're looking at the socket the way it's shown in the diagram, the numbers are all inverted, meaning you'll be checking the wires that are in the socket not in the ABS unit itself which is pictured above, so make sure you keep that in mind while checking them.
The connectivity to all 4 sensors is there.
Now I wonder if there's a way to kind of "hard reset" the abs ecu by anyway to clear the internal codes from it ?
the way to clear codes from the manual didn't help as the code 35 remains which points to a rear right or front left sensor having open circuit, which is not the case after testing....
any inputs ?
thanks again and HAPPY NEW YEAR everyone !
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