Hello! My name is Jake and I have an 04 RX330 with 230,000 miles on it. Not certain on the history of it but I have gotten it with no heat and an overheating problem(EDIT: previous owners said it has overheated on them). I immediately knocked out the easy stuff, checked coolant levels, verified fans were working. So I end up doing serious work that it needed: waterpump, timing belt, power steering pump, upper/lower intake gaskets, thermostat(THM 117-$11.32 at napa), valve cover gaskets, spark plugs. I end up finding smoke swirling out of a crack in the radiator while the car was idling for an hour during a fuel injector decarbonizing process. I end up replacing the radiator as well as the fan motors with the relay because the fans wouldn't turn on. I ended up using a power probe straight to the old fan motors and only fan #2 worked. I end up putting it all together-bled all of the air out of the cooling system with an airlift evacuation tool-and this thing is still overheating! Today I pulled it in and put the scantool on it-temp reads 244 degrees, so it's up there. I take a laser thermometer gun and the passenger-side (or upper hose) of the radiator read 183 degrees give or take and the part of the intake that the sensor screws into was around the same. So I thought it's only a $20 sensor, and replaced it-also considering it had a previous P0117 code(engine coolant temperature circuit low input). I know when the DTC is aiming at the input part of a circuit, it's talking about something with the sensor. I thought this would do it, BUT the car still overheats via gauge. Good news was I had heat, so I'd blast it when it starts climbing up and it'd slowly go down. I'm really stumped now, because I know the heater core acts as a mini radiator, but it doesn't make sense that the heatercore cools the engine down but not the fans and radiator being fully functional. The upper heater hose is piping hot with pressure but the lower hose is room temperature with pressure, I verified by squeezing the hoses. Is the thermostat defective? I installed it with the wobbler pin positioned at the top via installation instructions. I feel like I might run a compression test tomorrow to check the head gaskets, but I feel like I'm missing another sensor or something-I'm a freshman in college so anyone with experience I'd greatly appreciate it!
I recently brought my car in to have the dashboard replaced under the Warranty Enhancement Notification and had the car battery replaced at the same time.
When I picked up my car, the moonroof would not open and neither the tilt nor power button would do anything, so I could not reset it myself. The dome/map light would not come on manually or when a door was open. These remain issues.
A little while later, the audio system started doing strange things intermittently including:
power off causes eject disk, then power off switches radio to FM, then power off ejects another CD; power off causes eject disk, I reload disk, then power off turns unit off; power off causes eject disk, hitting load turns off unit; power off causes eject, do not load a disk, unit shuts off by itself. Otherwise it is hard to switch off the unit. After a couple of weeks, this behavior mostly stopped. Now the light which illuminates the radio display stays off most of the time, but sometimes it will come back on.
One of the dual function tail lights stopped working (it was off with the headlights on and came on when the car was in reverse - the dash indicator light came on indicating an issue) and then it started working again and the dash indicator light went off).
I plan to return the car to the dealer to see if they can figure out what is going on. Could all this be related to just the battery being disconnected? When I changed the battery myself on a 2005 RX330, nothing happened other than needing to reset the power windows. When a dash is replaced, does any wiring harness behind it need to be unplugged? If so, perhaps there is a poor connection when a harness was reconnected.
I have seen many posts about this but none that says it was successfully done.
Is there any one out there who has successfully updated a Gen4 nav and audio with ML to a Gen5 system ML?
If there is please share any info relating to:
1. What parts are needed to be changed
2. what connections need to be rewired or added.
3. Is the finished upgrade fully working or are there features that are missing?
Gen 4 Mark Levinson - note CLOCK button
Gen 5 with DVD and Mark Levinson - note AUDIO button