ABS ecu location
Thread Starter
Lexus Test Driver
Joined: Nov 2002
Posts: 853
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From: New York
ABS ecu location
1990 LS400 w/trac.
I wanted to know where the ABS ecu is located. because after checking all the sensors for a code 35, the lights of trac off and abs is still not going away. So i plan on swapping the ABS ECU to see what that does.
I tried to reset codes using the methods described. It says to jump the TC and Te1 and to take the jumper pin off.
the only place I found the jumper pin was on the far right side of the hood under a plastic cover. Is that the correct jumper pin used to reset the codes ?
thanks in advance. !
I wanted to know where the ABS ecu is located. because after checking all the sensors for a code 35, the lights of trac off and abs is still not going away. So i plan on swapping the ABS ECU to see what that does.
I tried to reset codes using the methods described. It says to jump the TC and Te1 and to take the jumper pin off.
the only place I found the jumper pin was on the far right side of the hood under a plastic cover. Is that the correct jumper pin used to reset the codes ?
thanks in advance. !
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Thread Starter
Lexus Test Driver
Joined: Nov 2002
Posts: 853
Likes: 0
From: New York
thanks for that.
would you happen to have the wiring diagram from the speed sensor to the ECU by any chance. I want to check the wires for connectivity as well while I'm at it. thanks again ! much appreciated.
would you happen to have the wiring diagram from the speed sensor to the ECU by any chance. I want to check the wires for connectivity as well while I'm at it. thanks again ! much appreciated.
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Thread Starter
Lexus Test Driver
Joined: Nov 2002
Posts: 853
Likes: 0
From: New York
Could it be that the ABS ECU is bad but only code 35 which is an open circuit code is coming up ? Would a bad ECU not throw a specific code that would point to a bad ECU unit ?
From the codes, bad ECU would keep the light always on.... ?
any ideas. thanks in advance.
p.s. would i have to access the abs ecu from inside the car ?
From the codes, bad ECU would keep the light always on.... ?
any ideas. thanks in advance.
p.s. would i have to access the abs ecu from inside the car ?
Lexus Champion
Joined: Oct 2003
Posts: 3,350
Likes: 6
From: California
Check the ABS sensors and harnesses at each wheel. The ABS light is on - that means the ECU is getting power but is detecting a fault.
To access the ABS ECU, drop the passenger knee bolster. It'll be mounted on a bracket and the engine ECU is right by it.
To access the ABS ECU, drop the passenger knee bolster. It'll be mounted on a bracket and the engine ECU is right by it.
Thread Starter
Lexus Test Driver
Joined: Nov 2002
Posts: 853
Likes: 0
From: New York
What happened was that I gave it for suspension work and the mechanic broke the rear sensor. without telling me the guy then soldered the sensor back but that obviously wasn't done correctly. Now even with a new sensor in place the code doesnt go away. I'm thinking that during the course of soldering / tampering with the sensor too much voltage probably went to the ECU. ( my guess) and has tampered with the ECU itself. Otherwise,why would putting in a new sensor both in the rear and front not resolve the issue...
Lexus Champion
Joined: Oct 2003
Posts: 3,350
Likes: 6
From: California
Go to a junkyard and get the wiring connector and piggytail. You have 2 options to splice it back on -
a. You can solder+heat shrink the connection, this results in a more reliable connection
or
b. Use a butt splice, crimp it and heat shrink it.
a. You can solder+heat shrink the connection, this results in a more reliable connection
or
b. Use a butt splice, crimp it and heat shrink it.