Fellow 2000 and newer LC owners, I need your help.

Joined
Dec 9, 2008
Messages
41
Location
Central Jersey
I finally diagnosed what causes the VSC off, VSC, ABS and brake lights to come on. It turns out that everytime I tap the brake pedal really fast it would send a vibration to the ABS, TRAC and VSC computer located to the left of the brake pedal and therefore setting off the lights. Can anyone with a 2000 or newer LC check something out for me, tap on the ABS computer lightly with a screwdriver handle and see if VSC off, ABS, or the brakes light come on. Thanks for your time.
 
Joined
Dec 9, 2008
Messages
41
Location
Central Jersey
Why would you tap the brakes? I can understand if you didn't have ABS, but . . .
The problem started happening recently and I couldnt diagnose why. Then stuck in traffic, I tapped the brakes a few times and the lights came on. I thought it was the brake light sensor but after removing the connecting and testing it, there were nothing wrong with it. I then started to tap around the brake pedal area and finally found the source to be the ABS CPU. The light would come on whenever I tap on the CPU box.
 

100 TD

 
Joined
Mar 3, 2004
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2,081
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OZ
Check mounting of ecu. Unplug all connecters on ecu, spray clean contacts and replace and ensure connectors are mating and locked in correctly. See if this helps.
 
Joined
Dec 9, 2008
Messages
41
Location
Central Jersey
Check mounting of ecu. Unplug all connecters on ecu, spray clean contacts and replace and ensure connectors are mating and locked in correctly. See if this helps.
I tried jiggling the connectors and it does not set of the lights. It is set off by taps to the ecu. Can anyone just tap their abs ecu box and see if it sets off the lights.
 
Joined
Jul 27, 2008
Messages
274
I tapped it, got some weird looks from my wife but oh yeah, I was all over that!!

:clap: jk

Sounds a bit what I had; turned out to be a bad wire so they replaced the whole engine harness.. In your case, could be that or bad connection on a circuitboard...


I tried jiggling the connectors and it does not set of the lights. It is set off by taps to the ecu. Can anyone just tap their abs ecu box and see if it sets off the lights.
 
Joined
Dec 9, 2008
Messages
41
Location
Central Jersey
I tapped it, got some weird looks from my wife but oh yeah, I was all over that!!

:clap: jk

Sounds a bit what I had; turned out to be a bad wire so they replaced the whole engine harness.. In your case, could be that or bad connection on a circuitboard...
Hey Kanaljen, when you tap the box, did the light light up? I dont think it is the wiring harness problem. I am leaning more towards the abs cpu. Anyone live in Central jersey and wanna help me out...:grinpimp:
 
Joined
Sep 30, 2006
Messages
818
Location
Baltimore
It actually doesn't sound strange to me. I would expect that when you pump the brakes you are overriding the ABS and there should be a light on the dashboard to tell you it is not working.
 
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