Lexus SC430 :: Heater Fan Started To Switch On And Off By Itself
May 25, 2014
My 2002 SC430 didn't start this evening.
The engine turns over as normal, I can smell the unburnt fuel out the exhaust. I can hear the fuel pump working etc. It gives a slight cough upon first turn of the key but will not come near firing up properly. The engine turns over at speed from the starter but without any further signs of ignition.
The car's key is unlocking the car with the remote on the key as normal so I don't think it's an immobiliser issue. The battery is fully charged and turned the engine over for about 5 minutes in total during the hour I tried to start her in so there is no battery voltage problem.
A strong side issue is that the heater fan started to switch on and off by itself yesterday, and this morning stopped altogether on the drive home. Another thing is that the heater fan briefly turns for one tenth of a second of so when switching the car off, even when selected to off on the climate control screen.
I disconnected the battery, pulled out the ECU to check for visible problems on the connectors like corrosion, damp etc but found none. The earth straps in the engine area all seem good, all fuses seem good too. I've pulled and re-installed all the visible engine bay fuses, but nothing improved. No big fuses are blown that I can see. The cars remains a non-starter and the heater fan still won't operate as normal.
Lastly, the boot / trunk area seems to be quite damp so I let it open for a while to dry out tonight.
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I was told that I must buy the whole panel and it is really costly. I thought maybe I can replace only the screen? Is it possible? Or can I get any other car LCD and fix it into this panel??
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Popped the hood and swapped out Pass & Driver's fuses. Pass side fuse is ok - ran the Driver's side ok.
Dropped the top and both windows ran down and back up ok. I'm guessing connection in driver's door(?). Maybe that switch for passenger window is bad?
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My car is high mileage (over 130K), it's hard to justify purchasing a $230 sensor and paying for installation. My only goal is to keep the check engine light from turning on and passing state inspection/emission (the check engine light will prevent passing inspection/emission in my state).
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I was able to raise the top and the windows. But when I push the button to lower the top the red light to the switch blinks but nothing happens. My question, do I have to reassemble tyne trunk in order to lower the top. If that is the case how is everyone doing the woofer and amp work with the top lowered.
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A guy noticed the other day when I cut the AC button on, the clutch engaged and cut back off. He didn't have time to fully check it that day and wants me to bring back if I can another day.
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I bought a relay, but that did not work. I just read on the LS forum that a lot of people have had problems with the AC pressure switch.
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