2003 Toyota Sienna Electrical Problems

Your instrument panel doesn't work properly, and when you drive faster than 30-40 mph, the vehicle slows down and all warning lights come on. A mechanic replaced the computer sensors, but this didn't fix the problem. The issue may involve the electrical system, engine control computer, or related sensors that need further diagnosis.

ON 09/04/09, MY 2007 TOYOTA COROLLA COMPUTER FAILURE RESULTED IN POWER LOSE WITHIN SECONDS AT TRAFFIC LIGHT AND STOPPED. THIS HAS BEEN REPORTED TO NHTSA ON 09/08/09 AND COMPLAINT # IS 10283338. HOWEVER, MY ANOTHER TOYOTA CAR ALSO HAD COMPUTER FAILURE IN NOV 2009. ALL OF MY 2 TOYOTA CARS HAD COMPUTER FAILURE IN 2009. I BELIEVE THE TOYOTA CARS HAVE COMPUTER PROBLEMS AND I SUGGEST NHTSA TO OPEN INVESTIGATION. 2003 TOYOTA SIENNA COMPUTER FAILURE RESULTED ENGINE LIGHT ILLUMINATED AROUND NOV. 21, 2009. *TR

DESIGN DEFECT ON HORN FOR 2003 TOYOTA SIENNA. 1. ONLY ONE OUT OF THE TWO HORN BOTTOM CONTACT PLATES IS ELECTRICALLY CONNECTED. 2. THE STEERING WHEEL IS NOT DIRECTLY GROUNDED BY THE SPIRAL CABLE. GROUND FROM SPIRAL CABLE IS USED FOR THE CRUISE CONTROL AND REMOTE RADIO CONTROL. THE GROUND FOR THE HORN IS ONLY INDIRECTLY GROUNDED THROUGH THE SHAFT. I JUST HAVEN'T USED THE HORN UNTIL RECENTLY. HORN IS NOT RELIABLE. SOME TIMES IT DOESN'T WORK. ESPECIALLY WHEN PRESSING ON THE LEFT SIDE OF THE HORN PAD. MANY PEOPLE HAVE BEEN COMPLAINING OF HORN MALFUNCTION ON TOYOTA CAR OWNER BOARDS AND TOYOTA NOT BEING ABLE TO REPAIR IT PROPERLY (REPLACING SPIRAL CABLE AND RELAY), ON MY VAN, THE CONNECTION TO THE RELAY IS MISSING (NEVER INSTALLED) ON THE LEFT SIDE CONTACT PLATE AND ACTIVE GROUND IS MISSING. I HAVE NOT FIGURED OUT HOW TO FIX THESE SAFETY DEFECTS. *TR

TOYOTA SIENNA 2003 BRAND NEW CAR THE BATTERY LEAK AND CAUSE THE RADIATOR DAMAGE DEALER STATE THAT THIS IS NOT A WARRATY REPAIR. THIS IS A WARRANTY REPAI AND THATS WHAT THE LEMON LAW SAYS . THE DEALER WHICH IS BAY RIDGE TOYOTA AND MAN WHO IS MANAGER TOM SCARPACCI SAYS THIS IS NOT WARRANTY REPAIR. *AK