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ABS, Brake warning, Engine check lite up. Tach, Speedo, mileage

2009 Honda Accord. I am told that the remote tire monitor system or ECM (what is that) can be affected by a single CB radio transmission. (outside the car antenna and radio is in a metal box under driver's seat and the antenna is fed with groounded-shield coax!!) When told that my 1997 Toyota Avalon had a 100 watt ham radio and 12 watt SSB CB, the tech said, ''yeah but it does not have the tire monitor system.'' Mabe that is why I have never seen a police car with all their electronic gadgets being a Honda. Walt.

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  • jcw7qis Jun 16, 2009

    I don't know if there is a problem with the TPM...I just got a call which said they had taken an ECM out of another car and put it into ours. That the dash panel display has apparently returned to normal. If the tire units are transmitters then they should QRM (interfere with) the CB receiver. That has not happened.



    Since I might have the CB plus a 50 watt ham station in the Honda, what do you receommend that I do to prevent this ECM failure....With about 700,000 ham radio operators and who know how many CB operators and who knows how many FRS (family radio service) ops there are...seems that Honda is alienating a large market if they can't prevent interference from owners 2-way radios.



    Your comments please. Walt.

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THE SENSORS FOR TIRE PRESSURE ARE INDEED MINIATURE RADIO TRANSMITTER'S, THE FREQUENCY OF THAT SIGNAL IS NOT IN THE SPECIFIED IN THE FACTORY SERVICE MANUAL, SO YES IT IS POSSIBLE FOR THE SIGNALS TO BE INTERFERED WITH BY A CB RADIO TRANSMISSION, BUT THE TRANSMISSION SOURCE WOULD HAVE TO BE VERY CLOSE. ECM STANDS FOR "ELECTRONIC CONTROL MODULE", THE SYSTEM IN THE CAR THAT MONITORS TIRE PRESSURES IS CALLED A "TPM", OR TIRE PRESSURE MONITOR, IT CONSISTS OF 5 SENSORS (4 TIRES AND SPARE) THAT ARE RADIO TRANSMITTERS AND A RECEIVER THAT RECIEVES IT'S SIGNAL FROM THE WHEEL MONITORS THROUGH THE ANTENNA OF THE CAR. DO U HAVE A PROBLEM WITH THE TPM SYSTEM?

Posted on Jun 16, 2009

  • yadayada
    yadayada Jun 16, 2009

    POLICE CARS HAVE TON'S OF ELECTRONICS'S, JUST LIKE YOUR CAR, I KNOW BECAUSE I HAVE WORKED ON DOZENS OF THEM, THE ELECTRONIC CONTROL MODULE (ECM) IN YOUR CAR IS SHIELDED AGAINST OUTSIDE RADIO INTERFERENCE, IF IT WASN'T EVERY TIME YOU WENT UNDER A HIGH POWER TRANSMISSION LINE YOU WOULD HAVE A PROBLEM WITH THE SYSTEM, THE RADIO OUTPUT OF SUCH POWER LINES IS MORE THAN YOUR CB RADIO, AND EARLY SYSTEMS DID SUFFER FROM THIS INTERFERENCE, BUT IT SHOULD NOT AFFECT YOUR CAR, I SUSPECT IF THE ECM HAS A PROBLEM IT IS JUST COINCIDENCE AND NOT YOUR CB RADIO THAT CAUSED THE PROBLEM, IF THAT IS WHAT THEY ARE SAYING 35 YEARS OF ELECTRONIC ENGINE CONTROL WORK SCREAMS AT ME THAT THEY ARE BLOWING SMOKE ON THIS THIS. mY CREDENTIALS? 40 YEARS AS A PROFESSIONAL TECHNICIAN, CERTIFIED MASTER TECHNICIAN IN ALL PHASES OF AUTO REPAIR.

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