Opened up the ecu 1996 ls400
#1
Rookie
Thread Starter
Opened up the ecu 1996 ls400
So I popped open the ecu after struggling to remove it from the car. I couldn't find any problems with the capacitors or anything that looked out of the ordinary. The car doesn't really have any symptoms but I figured with 210k miles I should check. Photos below. Let me know what you think. Maybe it has been replaced or fixed already? Only symptom I have is my AC will not stop. Ac clutch will not disengage unless I pull the relay for the ac clutch.... And sometimes I feel a little hesitation while cruising on the freeway around 70mph... Like a ever so slight surging.
#2
Moderator
LOL. Those capacitors can't be checked by human eyes. You need to check them measuring the ripple level or the ESR.
https://www.lexusownersclub.co.uk/fo...-today-by-ian/
https://www.lexusownersclub.co.uk/fo...-today-by-ian/
#3
Why don't you just change all the electrolytic capacitors?
Old capacitor. All electrolytic capacitors with non-solid electrolyte age over time,
due to evaporation of the electrolyte. The capacitance usually decreases and the equivalent series resistance (ESR)
usually increases. The normal lifespan of a non-solid electrolytic capacitor of consumer quality, typically rated
at 2000 h/85 °C and operating at 40 °C, is roughly 6 years. It can be more than 10 years for a 1000 h/105 °C capacitor
operating at 40 °C. Electrolytic capacitors that operate at a lower temperature can have a considerably longer lifespan.
Old capacitor. All electrolytic capacitors with non-solid electrolyte age over time,
due to evaporation of the electrolyte. The capacitance usually decreases and the equivalent series resistance (ESR)
usually increases. The normal lifespan of a non-solid electrolytic capacitor of consumer quality, typically rated
at 2000 h/85 °C and operating at 40 °C, is roughly 6 years. It can be more than 10 years for a 1000 h/105 °C capacitor
operating at 40 °C. Electrolytic capacitors that operate at a lower temperature can have a considerably longer lifespan.
#4
Considering the amount of work it takes to get that ecu out, you might as well replace the caps. Even if they are fine somehow after all these years, just some preventative maintenance. It's not like you change your oil after you spin a bearing lol
#5
Pole Position
#6
Rookie
Thread Starter
It's not that much work or time getting the ECU out. (about 5-10 minutes) But seeing how it is out, yes, you might as well change the caps. Or have someone change the caps if you can't do it. Can't really tell if it's been done but there is some markings on the case I don't recognize.
Does anyone know of somebody that could replace the caps in california? I'm near SF. Also, where is a good spot to buy a kit? I don't want to replace them with lower quality caps.
Thanks for the suggestions guys.
#7
Moderator
iTrader: (7)
if you want a one-stop shop, tanin auto is a certified vendor here on CL who can help but you will have to ship your ECU to him I believe.
https://www.clublexus.com/forums/mem...taninauto.html
the other route is buy the caps from a place such as digikey and find a local solder shop who knows how to work on PCB boards. more on caps and links to what exactly you need are in the mother thread here.
https://www.clublexus.com/forums/mem...taninauto.html
the other route is buy the caps from a place such as digikey and find a local solder shop who knows how to work on PCB boards. more on caps and links to what exactly you need are in the mother thread here.
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#8
Rookie
Thread Starter
if you want a one-stop shop, tanin auto is a certified vendor here on CL who can help but you will have to ship your ECU to him I believe.
https://www.clublexus.com/forums/mem...taninauto.html
the other route is buy the caps from a place such as digikey and find a local solder shop who knows how to work on PCB boards. more on caps and links to what exactly you need are in the mother thread here.
https://www.clublexus.com/forums/mem...taninauto.html
the other route is buy the caps from a place such as digikey and find a local solder shop who knows how to work on PCB boards. more on caps and links to what exactly you need are in the mother thread here.
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