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Found 3 results


    Thought I may share a recent experience. I was asked recently via another forum about a code that I had not had much experience off P0AA6 & with techstream i found sub codes 526 & 612 I think from memory - I was aware they were to do with an HV (High Voltage) Isolation Error (to explain:- the HV electrical system is isolated or if you like - mechanically & electrically separated from the normal 12v electrical system & the body of the car for obvious safety reasons - this is why all HV cabling is orange too, to clearly identify the hazard ) From experience & a bit of lateral thinking & in the absence of any other possibilities like the car had been recently worked on or something my thoughts were "Water" Yes you heard me right Water:- I have personally witnessed & repaired hundreds of electrical nasties caused by water. Given that Doris had not long passed this sparked (excuse the pun) my attention. Anyway to cut a long story short (well 1& half hrs) I located a spot underneath the car that looked "grazed" it was conspicuous because it was very clearly orange plastic when everything else around was covered in road muck, further chatting revealed that "its been doing it (throwing CHECK HYBRID SYSTEM) for a few days now but I just clear it down with my scanner mate & it seem ok after that its weird" - "oh yeah & it don't seem to happen when its just sat in park!" mmmmmm I say scratching me chin - thats because that section is not energised until its in drive or reverse - anyway a quick clean with wd40 then a wash with solvent reveals a black tracking mark where HV electricity has been leaking (or tracking in the trade) to the chassis causing the CHECK HYBRID SYSTEM error, a bit of scraping some hot melt glue, wd40 & a bit of orange flexible conduit i had lying around, a spread of hot soldering iron & bingo Job done - no problem even after a good direct blast with hose pipe (don't do that at home folks!) The chap was about to buy a whole new gearbox!!!! So don't automatically assume the worst
  2. Hi all I have a 2002 (old shape) RX300 bought it with 75K on the clock and now has 103K. It has an intermittent problem with the cruise control thats driving me nuts. If I set the cruise control to ON the green cruise light shows on the dash and it will work for approximately 40 miles sometime around then the cruise light will flicker off/on and disengage the set speed, the cruise light will remain on. The further you drive the car and more you reset the cruise control the worse the problem gets. The Cruise light shows 4 different symptoms starting at one and progressing through 1 - flickers off for a fraction of a second disengaging the set speed 2 - flickers off for a fraction of a second refusing to set a speed T 3 - flickers on and off in a series of patterns (as it gets worse) 4 - it goes off completely. The only way to get the light back on is to press the on/off button Twice or turn the ignition off then restart the car and press the on/off button once (eventually) I generally drive between 50-60 mph but the fault does not seem to be speed related. I have actually had the car stood on the drive engine running cruise control ON (having returned from a trip up the motorway). Pressing the cruise control stick down as if to set the speed resulted in the Cruise light flickering off for a second exactly as would when driving but refusing to set a speed. When the fault is showing turning the ignition off and restating the car doesn't clear the fault. Leaving the cruise off or not trying to set a speed for some length of time while driving does seem to bring it back to some form of intermittent operation but not for long.L leave the vehicle until the next day and its good for another 40 miles or so on cruise. I had an Independent repairer check the On board diagnostics and they came back with three fault codes B1421 passenger side Sunlight penetration photo Circuit defective C1223 Control Unit Faulty Operation C0278 Relay Solenoid Valve Open/Close Circuit Has anyone had anything similar and what was the fix please? Any Ideas Anyone? PLease
  3. My Lexus SC430 parking sensor alarm sounds intermittently while I am driving. (No, I do not tailgate the car in front.) It has happened several times, all but once when it was raining. On that one occasion, the sun was shining. It happened again today while it was raining, and continued to sound after the rain had stopped, but the road was still wet. What could be causing this to happen, and how can it be prevented, please? I have decided to fit an ON-OFF switch, if the problem cannot be solved conventionally.