97 land cruiser wet carpet passenger side . have blown clear sun roof drain vents ..air con is dripping ok pipe outside floor pan ...no coolant usage ..no smell to wet carpet ... dried carpet drove last night 200 miles did not use air con..carpets soaked ..help me out here !!

lots of ways, to leak rain (or other things)
windshield glass cracked
door seals bad or door warped
heater core, leaking engine coolant, (not water AF50% coolant)
the water in hand feels slimy, is not rain.!!
the cars most have cowl vent area in front of windshield glass.
this cowl when opened UP we see drains if the 2 or more drains Are clogged up with leaves or nests. the cowl floods like a bath tub
and overflows the HVAC fresh air vent, port, (a coffer dam it is)
and flows to the hVAC blower and to the floor., bidda bodda boom.
or super bad rusted car bodies sure do leak.
never ask the blind we can not see your car, blind
find shop tech to find it , living hands on work.

One side only or both? Do you have a sunroof? Clogged drain vent for sunroof, cowl, A/C, bad weatherstrip?

I have one of these, it did the same thing. I found the sun roof seal had gone hard ( due to the u.v from the sun ) and was not sealing properly.
Th drain hose from the cavity was blocked, the water ran down the door pillar and on to the fire wall and out behind the carpet.
Allso if the air conditioning condensation collector drain is blocked water will find its way the the carpet. the drain should empty to the ground.

sounds like the air conditioning drain for condensation is plugged

you have 2 drains in the front that go down the a pillars and dump near the fenders.

The rear usually go down the B pillar or C pillar and out thebottom near the rocker panel.

Blow them out from the top with compressed air and make sure you have air flow at the exits.. Open the roof to see drain holes in the four corners.

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• The roof opening panel leaks

• Roof opening panel adjustment.
• Front rail seal.
• Drain tube attachment points.
• Roof opening panel water trough and seal.
• Roof opening panel drain hose.
• Roof opening panel seal.
• Roof opening panel.

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1 is the drain hoses

Check with Toyota Parts. I'm sure there is one, but it is unavailable at a retail parts store. Heater cores are pretty much as necessary as the four tires on the outside are. My advice would be to remove the core and check the hose clamps or connections for other issues. You want to be sure that the leak is in the core and not in one of the hose connections. I think that is odd that your driver side floor is wet and not the passenger side. Open the hood and look for coolant hoses attached to the firewall (the sheet metal between your dash and the motor) and see if they are on the driver side or the passenger side.

You have drain blockage in the condesor case itself. There is a small tube that will drain the condensor case, the big black plastic case that contains most of your a/c system inside the car. This case collects moisture and that must drain normally from the case drain to the outside of your car onto the ground.. If this drain is plugged, you will have leakage on to the floor. If the moisture is allowed to remain in the carpet, mildew will set in and then you will have to replace the carpet.
Bill

It may be due to the air conditioning hose being blocked. Therefore the water must be backing up into the vehicle, under the carpets and into the back seats instead of flowing out

I am the original owner of camry xle 1998 with wet floors. In 2000 I had drivers side door seal leaking at welt. Removed old door seal and new weather strip on drivers side installed. The door panel was never wet, but wet at bottom of door where there are drain holes...slowly leaking under carpet.
In 2001 later water again. Coming from overflowing A/C evaporator-drain plugged/ tank full of debris. Removed evaporator, cleaned + drain cleaned.
In 2003, driver door seal against window rotted. Removed door panel and found leak at window belt molding at the mirror joint inside + out. Lots of mold under carpet needed to replace! Made a fuss at dealers for reacurring problem and they replaced the carpet for free.

check the sunroof drains,they may be clogged they are located on the right and left front of the sunroof.