One other interesting point to bring up is that vehicles with the i-VTEC/VCM systems are also equipped with an Active Noise Cancellation (ANC) System. Along with a drive by wire system and the ANC System, the operation of the i-VTEC system operates fairly seamlessly, albeit the slight normal vibration. The ANC System uses front and rear sound sensors mounted in the ceiling of the vehicle, as well as an ANC Control Module under the dash. Like wearing a Bose noise cancelation headset, the ANC System utilizes the vehicles radio speakers to cancel out noise by using an opposite phase sound. This reminded me of another quote I once heard — “Some people give sound advice, while others just give sound.”

 

There is a service bulletin by Honda entitled Excessive Vibration between 30 and 65 MPH (14-078). It is important to note that this bulletin is not addressing a problem with the Active Control Engine mounts. It is addressing the timing of when the VCM is activated and when the torque converter clutch is being applied. The torque converter apply strategy goes from Off, to Partial Apply to Full Apply. With that said, this bulletin addresses excessive vibration between 30 and 65 mph under certain driving conditions. It sites possible causes for both 2WD and 4WD applications as a calibration VCM operation combined with the action of the lock up torque converter causing excessive vibration. With 4WD vehicles, the propeller shafts center support bearing bushing material may not effectively dampen vibrations in cold (below 32°F) temperatures. The corrective measures are to perform the inspections provided in the bulletin. Based on the results, a PCM program update may be needed to correct the conditions. For 4WD vehicles, the propeller shaft may also need to be replaced.

 

The bulletin lists 2012 to 2015 Honda Pilot applications qualified by VIN range. It also stipulates that Honda vehicles use Keihin and Continental PCMs. Keihin PCMs contain two chips that require updating both the PGM-F1 and A/T system software. A software update for Continental PCMs has been made available in January 2015.

 

The bulletin also provides what normal torque converter operation looks like and what a possible torque converter issue looks like. 

A software update campaign 12-007 that is of interest applies to 2010-2012 MDX and ZDX vehicles. This addresses a similar concern and is described as follows: A judder from the torque converter lock-up clutch may be felt while driving between 20-60 mph.

To minimize the opportunity for the judder to occur, a software update for the transmission is available. The VIN needs to be checked for eligibility. Part of this repair is to drain the ATF and refill with approximately 3.3 quarts of new fluid.

 

With so much talk about vibration, it brings to mind yet another quote: Negativity, it can only affect you if you are on the same frequency. Vibrate Higher. Abraham Hicks had his own perception of reality when he said, “As you think you vibrate. As you vibrate you attract”. My first thought upon hearing that for the first time was, he wasn’t firing on all 6 cylinders.

 

Here is a sampling of vehicle applications utilizing the Active Control Mount system:

 

  • 2005-2007 Honda Accord Hybrid

 

  • 2005-2010 Honda Odyssey ((EX, LX & Touring models only)

 

  • 2006 & Later Civic Hybrid

 

  • 2006 & Later Honda Pilot (2WD models only)

 

  • 2008-2009 Honda Accord (Except EX, LX V6 & 6MT Coupe)

 

  • 2010-2012 Honda Accord V6 (Except EX, LX V6 & 6MT Coupe)

 

  • 2013 & Later Honda Accord V6 (Except 6MT Coupe)

 

  • 2009 & Later Honda Pilot

 

  • 2013 Honda Accord V6 (Except 6MT Coupe)

 

  • 2011-2014 Honda Odyssey

 

  • 2013 Acura RDX V6

 

  • 2013 Acura RLX

 

  • 2014 Acura MDX

 

  • 2015 Acura RLX Sport Hybrid

 

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