Revised 10/01/2021
How to install the Single Value AST Smart ECO VCM Modules
The unit should be installed into a cold engine so you do not trip a P0128 or P0118 code and get a check engine light.
Most engines will take 4+ hours to fully cool down to ambient temperature after being operated normally.
Alternately, you can install on any temperature engine as long as you have an ODB2 device to clear any error codes.
Most engines will take 4+ hours to fully cool down to ambient temperature after being operated normally.
Alternately, you can install on any temperature engine as long as you have an ODB2 device to clear any error codes.
STEP 1: FAMILIARIZE YOURSELF WITH THE ENGINE BAY
Locate your current ECT1 plug, normally located here. This photo is from a 2008 Honda Accord.
Locate your current ECT1 plug, normally located here. This photo is from a 2008 Honda Accord.
STEP 2: REMOVE EXISTING PLUG
The plug has a locking mechanism on one side, push in with your thumb to unlock it, then carefully slide it up to remove the female plug from the ECT1 sensor. Make sure your engine is cold before performing this step.
The plug has a locking mechanism on one side, push in with your thumb to unlock it, then carefully slide it up to remove the female plug from the ECT1 sensor. Make sure your engine is cold before performing this step.
STEP 2: (CONTINUED)
In the photo below, you can see the female plug fully removed from the ECT1 sensor.
In the photo below, you can see the female plug fully removed from the ECT1 sensor.
GENERAL NOTES:
Your AST Smart ECO VCM module may look different than below, but they all require a similar installation procedure.
The female plug [red circle] will plug into the white connector in your engine.
The male plug [blue circle] will plug into the existing female plug you just removed from ECT1 in the previous step.
The thermal switch [green circle] will sense the engine temperature and engage the Smart ECO VCM module.
The unit also comes with other mounting hardware, including some tie down straps, a metal band, and thermal tape.
Depending on what model you order, your mounting hardware may look different than shown below.
Your AST Smart ECO VCM module may look different than below, but they all require a similar installation procedure.
The female plug [red circle] will plug into the white connector in your engine.
The male plug [blue circle] will plug into the existing female plug you just removed from ECT1 in the previous step.
The thermal switch [green circle] will sense the engine temperature and engage the Smart ECO VCM module.
The unit also comes with other mounting hardware, including some tie down straps, a metal band, and thermal tape.
Depending on what model you order, your mounting hardware may look different than shown below.
STEP 3: PLUG IN FEMALE CONNECTOR, THEN PLUG IN MALE CONNECTOR
Plug the one end of the AST Smart ECO module into the white connector on the engine.
You should hear it click into place when it is fully inserted.
Plug the other side of the AST Smart ECO VCM module into the plug you removed from the engine.
You should also hear it click into place when it is fully inserted.
Plug the one end of the AST Smart ECO module into the white connector on the engine.
You should hear it click into place when it is fully inserted.
Plug the other side of the AST Smart ECO VCM module into the plug you removed from the engine.
You should also hear it click into place when it is fully inserted.
FEMALE END PLUGGED INTO ECT1 ON ENGINE
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MALE END PLUGGED INTO THE FEMALE END THAT WAS JUST REMOVED
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STEP 4: MOUNT THE THERMAL SWITCH TO THE ENGINE
The thermal switch senses the heat from the engine and will engage the AST Smart ECO VCM module when your engine has warmed up.
Your unit has been optimized to mount the thermal switch to the coolant pipe as shown in the first photo below.
Lay the switch down flat on the pipe so it makes as much surface area contact as possible. It is important the heat from the engine can transfer to the thermal switch. The band will quickly snap into place, so be careful when installing.
Once the switch is in place, wrap the thermal tape around the band to cover it and any areas where the switch is exposed.
It is important to keep the colder outside air away from the switch.
The thermal switch senses the heat from the engine and will engage the AST Smart ECO VCM module when your engine has warmed up.
Your unit has been optimized to mount the thermal switch to the coolant pipe as shown in the first photo below.
Lay the switch down flat on the pipe so it makes as much surface area contact as possible. It is important the heat from the engine can transfer to the thermal switch. The band will quickly snap into place, so be careful when installing.
Once the switch is in place, wrap the thermal tape around the band to cover it and any areas where the switch is exposed.
It is important to keep the colder outside air away from the switch.
THERMAL SWITCH MOUNTING LOCATION
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LAY FLAT ON METAL PIPE
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COVER WITH METAL BAND
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STEP 5: SECURE ANY LOOSE WIRES AND ENJOY YOUR NEW ENGINE
Some vehicles may have more slack wires than others - secure any loose wires and try to prevent anything from touching the engine that is not insulated.
This completes the installation of the unit.
All items are 100% tested and inspected prior to shipping.
Feel free to contact us with any questions / comments / concerns you may have, or technical support you require.
We can quickly diagnose most installation problems you may have.
Email: [email protected]
Phone: 209-353-3330
Some vehicles may have more slack wires than others - secure any loose wires and try to prevent anything from touching the engine that is not insulated.
This completes the installation of the unit.
All items are 100% tested and inspected prior to shipping.
Feel free to contact us with any questions / comments / concerns you may have, or technical support you require.
We can quickly diagnose most installation problems you may have.
Email: [email protected]
Phone: 209-353-3330
RECORDED DATA FROM A TYPICAL DRIVE:
The graph below shows a typical unit in operation, reflecting data I collected from my ODB2 scanner and smartphone.
The engine temperature was approximately 63F when first started. This was also the air temperature outside.
I backed down my driveway and left the car to idle for approximately 1 minute, as I had to run back into the house to grab a couple of things for the road :) [I almost forgot my coffee!]
I then proceeded to leave my development and drive on some 25, 35 and 40 mph roads.
The engine temperature slowly increased until about 172F.
At that point, their was enough heat to transfer over to the AST Smart ECO VCM modules thermal switch and activate the unit.
The ECT1 reported engine temperature dropped by approximately 20 degrees to 152F.
While the engine temperature was being reported below 167F, the ECO mode was disabled.
Their was a small window from 5 minutes to 6:40 where the ECO mode was engaging, however the delayed activation of the AST Smart ECO VCM module is what sets it apart from the competitors - it automatically activates when the engine has warmed up, helping to prevent P0118 and P0128 check engine lights that other, "always on" units experience.
The graph below shows a typical unit in operation, reflecting data I collected from my ODB2 scanner and smartphone.
The engine temperature was approximately 63F when first started. This was also the air temperature outside.
I backed down my driveway and left the car to idle for approximately 1 minute, as I had to run back into the house to grab a couple of things for the road :) [I almost forgot my coffee!]
I then proceeded to leave my development and drive on some 25, 35 and 40 mph roads.
The engine temperature slowly increased until about 172F.
At that point, their was enough heat to transfer over to the AST Smart ECO VCM modules thermal switch and activate the unit.
The ECT1 reported engine temperature dropped by approximately 20 degrees to 152F.
While the engine temperature was being reported below 167F, the ECO mode was disabled.
Their was a small window from 5 minutes to 6:40 where the ECO mode was engaging, however the delayed activation of the AST Smart ECO VCM module is what sets it apart from the competitors - it automatically activates when the engine has warmed up, helping to prevent P0118 and P0128 check engine lights that other, "always on" units experience.
