[millerbl0]

With VCM enabled CTB will vary with fWT sometimes by 5 degrees or more
With VCM DISABLE CTB will stay at 162 and fWT will stay at 165 degrees. (I will take a screen shot of this)
Somehow CTB (block sensor) and CB1 (fWT) is linked. I think VCM is more embedded than we think.
(all these codes are on scan gauges web site.

This vehicle is VCM3. I noticed that VCM3 does not engage much rarely over 10 seconds and only very light load. (going downhill). The most it will engage is at 35 mph. I cant see it saving much gas as engages so rarely and fast.

Again only giving my experiences. (more testing to follow)

 

[Cbayman]

I’m not seeing ‘CTB‘ on Scanguage’s website. Can you post a link?

 

[millerbl0]

» X-Gauge Commands

www.scangauge.com

Ill take a pic of the codes when I can

 

[millerbl0]

Here you go:

Coolant Temp #1 (°F)
TXD: 0EF1228A10
RXF: C32200000000
RXD: 2008
MTH: 00090005FFD8
NAME: CT1

Coolant Temp #2 (°F)
TXD: 0EF1228A10
RXF: C32600000000
RXD: 1808
MTH: 00090005FFD8
NAME: CT2

2020
Try changing the the first two characters of the TXD to 10 (instead of 0E) if the above codes don't work.

 

[millerbl0]

CT1 is where the VCM muzzler goes.
CT2 is the block sensor (I renamed it)

 

[birchman17]

I’m not seeing ‘CTB‘ on Scanguage’s website. Can you post a link?

I think maybe you can name those custom codes whatever you want. If I remember correctly, fwt is a default code on the scangauge2, and there was also a custom code for basically the same thing. I was hoping that my defeat device would only affect one of these codes so I could monitor the actual temp with the device active, but it affects both of them. I happened to call my custom code WT1. Not sure if I came up with this name myself, or copied it from somewhere.

From what I remember, fWT and WT1 were always either the same, or within one degree of each other. It is kind of curious that they aren't always the same. I'm assuming that his CTB code is the same as my WT1 with a different name. Not sure why his is 4 or 5 degrees different, but I really know very little about this stuff.

 

[birchman17]

CT1 is where the VCM muzzler goes.
CT2 is the block sensor (I renamed it)

I thought CT2 was like the cold water tank, or something? Mine usually stays near the ambient temperature unless I'm idling for a while. Maybe I'm thinking of a different set of codes?

 

[Cbayman]

CT1 is the coolant temp near the head. CT2 is is coolant temp at the bottom of the radiator. In older Hondas a thermoswitch and AC pressure switch was used to turn on the cooling fans. Now the PCM uses ECT1, ECT2 and AC pressures to determine cooling fan HI, LO or OFF.

 

[millerbl0]

From my limited testing VCM disabled seems to affect CT2 to...

 

[Antares]

I almost sold my truck because the VCM caused hard shifts and vibration. I may be wrong but seems I read that the torque converter is engaged with VCM activation. Sometimes, with VCM on, a shift would feel like I had put the brakes on. It was too annoying to live with so my choice was sell or use VCM. But I don't like making alterations such as VCM...

 

[snakebait6]

We have no issues with how our 6-speed Ridgeline shifts, maybe some day I can find somebody who does not like the way the Ridgeline shifts to ride with me and describe what they are feeling that is so disagreeable? On a similar note, could it be the "soft" shifting that is causing some of the heat issues some are attributing to the 6-speed?

Bill

Transmission in our 2017 RL worked perfectly, 6 speed in our 2019 Pilot woks perfectly. Transmission in our 2022 RL works perfectly. I think the 9 speed is just a hair smoother but not worth bragging about.

 

[TShea]

Been experimenting with VCM disabled and enabled. I get rough shifts in heavy traffic with VCM disabled. Smooths out when VCM is enabled. I am wondering if the ECT1 temp set to 167 is altering shift points or the motor mounts need some sort of power on all the time to smooth out shifts that with the temp at 167 its not doing.

I like VCM disabled. I wish Honda would not have done this tech. I wish there was a way to reflash the ECU itself to disable VCM. More testing to follow....

Forgive my ignorance, but what is VCM? What does or doesn't it do? What are the benefits of disabling it? Thanks.

 

[millerbl0]

Disabling or leaving VCM enabled is up to each person. I am just giving my observations

 

[snakebait6]

Found this info: so it must be a temp problem

*The engine mounts are not directly controlled by VCM. Instead, they are continuously changing firmness based on predicted vibration using information from the crankshaft and camshaft position sensors. 3 cylinder mode creates more vibration which is picked up by the crankshaft position sensor. The active control engine mounts do not have a "3 cylinder mode" - they're always working to reduce engine vibrations in all modes.

Found this info: so it must be a temp problem

*The engine mounts are not directly controlled by VCM. Instead, they are continuously changing firmness based on predicted vibration using information from the crankshaft and camshaft position sensors. 3 cylinder mode creates more vibration which is picked up by the crankshaft position sensor. The active control engine mounts do not have a "3 cylinder mode" - they're always working to reduce engine vibrations in all modes.

"The active control engine mounts do not have a "3 cylinder mode ":::: "The engine mounts are not directly controlled by VCM ". Does this engine have 2 sets of engine mounts or am I misreading?

 

[snakebait6]

Forgive my ignorance, but what is VCM? What does or doesn't it do? What are the benefits of disabling it? Thanks.

I have read so much about VCM I should be able to write a book about it, however I am so confused by what I have read I am just leaving mine as it came from the factory.

 

[SEW]

Forgive my ignorance, but what is VCM? What does or doesn't it do? What are the benefits of disabling it? Thanks.

Variable cylinder management. Under light loads, 3 cylinders are deactivated IOT save fuel. Various car companies have used this, but often with poor results. GM in the 80s had a disastrous situation with the 4,6,8 Cadillac. Honda had problems with their V-6s in the 2000s up thru 2016: fouled plugs, excessive oil consumption, and cylinder wear on the deactivated cylinders.
Lots of speculation as to why: uneven heating of the block, rings not under compression pressure causing wear, etc. I had the VCMuzzler 2 on my 2017 from early on thru 82,000 miles. It used zero oil between changes. FWIW, our 2013 Accord EX-LV-6 didn’t have deactivated VCM and is still fine at nearly 100K miles.
Though I found nothing published, VCM was used with the V6 used in the Ridgeline. I’m not aware of what changes are in this version of the 3.5V6 other than direct injection verses port injection.
Why is it ok now, but problematic before???
Just this afternoon, I called and discussed this very matter with the service representative at my local dealer. He didn’t know why there are not problems with this DI engine but they’re not showing up. I’ve decided that since my ‘22 Ridgeline has a lifetime power train warrenty, I’ll disconnect the VCM2 that I’ve had installed for these 1st 2 thousand miles.
Again, I can’t find out why it’s ok now but wasn’t then. My service manager says it hasn’t been addressed that he can find.
Deactivating comes at a cost of the device and about 1 - 1 1/2 mpg.
There are arguments each way.

 

[eurban]

Variable cylinder management. Under light loads, 3 cylinders are deactivated IOT save fuel. Various car companies have used this, but often with poor results. GM in the 80s had a disastrous situation with the 4,6,8 Cadillac. Honda had problems with their V-6s in the 2000s up thru 2016: fouled plugs, excessive oil consumption, and cylinder wear on the deactivated cylinders.
Lots of speculation as to why: uneven heating of the block, rings not under compression pressure causing wear, etc. I had the VCMuzzler 2 on my 2017 from early on thru 82,000 miles. It used zero oil between changes. FWIW, our 2013 Accord EX-LV-6 didn’t have deactivated VCM and is still fine at nearly 100K miles.
Though I found nothing published, VCM was used with the V6 used in the Ridgeline. I’m not aware of what changes are in this version of the 3.5V6 other than direct injection verses port injection.
Why is it ok now, but problematic before???
Just this afternoon, I called and discussed this very matter with the service representative at my local dealer. He didn’t know why there are not problems with this DI engine but they’re not showing up. I’ve decided that since my ‘22 Ridgeline has a lifetime power train warrenty, I’ll disconnect the VCM2 that I’ve had installed for these 1st 2 thousand miles.
Again, I can’t find out why it’s ok now but wasn’t then. My service manager says it hasn’t been addressed that he can find.
Deactivating comes at a cost of the device and about 1 - 1 1/2 mpg.
There are arguments each way.

FYI, GenI Ridgeline used the 3.5 WITHOUT cylinder deactivation. Honda said it's brick like aeros were just too restrictive to make use of cylinder deactivation. GenII was the beginning of VCM in the Ridgeline.

 

[SEW]

Eurban,
I knew that but wasn’t clear. Vans and Accords did. Vans seemed to have the most problems.

Even a brick can go fairly fast if you put enough motor in it. F4s proved that!

 

[Solo]

I was told that the later models operate the VCM differently. If the PCM detects the VCM being activated for too long, it will disengage momentarily.

 

[HRL383]

Wonder what “too long” is? For a loss of only 1/2 mpg, I find ”not at all” just right.🤷‍♂️