DFCO and Autos - Toyota Yaris Forums

yarswiss · 11-13-2008, 10:19 PM

To answer the OP, DFCO can be engaged whenever the RPS are sufficiently high, the ratios of which (according to my Scangauge estimates) are 2nd:1700rpm, 3rd:1800rpm, 4th and Overdrive: 1800rpm. As a general rule of thumb, though, DFCO will engage whenever the rpms are significantly high and your car uses engine braking to slow down. For example, I live on top of a steep hill, so whenever I driver down in the morning, I go into 2 and the rpms will be around 2400, and DFCO will kick on, even though I'm only in 2nd gear.

Sometimes when I'm cruising about town, my DFCO will not engage, so I find giving a quick, light tap on the gas and then taking my foot off again will "force" the car into DFCO. This works best when you are on a long, smooth downhill where momentum keeps you between 30-40mph.

At freeway speeds, if you drive a hilly commute with steep enough downslopes that won't slow you down too much with engine braking, use DFCO whenever you go downhill. DFCO is also great to use whenever taking an exit, slowing to a traffic light on a slope, stopping at a stop sign, and coasting down any steep slope.

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11-13-2008, 10:19 PM	#20
yarswiss Albino truck smasher Drives: '07 Yaris LB Auto Join Date: Oct 2008 Location: Sunland, CA Posts: 101	To answer the OP, DFCO can be engaged whenever the RPS are sufficiently high, the ratios of which (according to my Scangauge estimates) are 2nd:1700rpm, 3rd:1800rpm, 4th and Overdrive: 1800rpm. As a general rule of thumb, though, DFCO will engage whenever the rpms are significantly high and your car uses engine braking to slow down. For example, I live on top of a steep hill, so whenever I driver down in the morning, I go into 2 and the rpms will be around 2400, and DFCO will kick on, even though I'm only in 2nd gear. Sometimes when I'm cruising about town, my DFCO will not engage, so I find giving a quick, light tap on the gas and then taking my foot off again will "force" the car into DFCO. This works best when you are on a long, smooth downhill where momentum keeps you between 30-40mph. At freeway speeds, if you drive a hilly commute with steep enough downslopes that won't slow you down too much with engine braking, use DFCO whenever you go downhill. DFCO is also great to use whenever taking an exit, slowing to a traffic light on a slope, stopping at a stop sign, and coasting down any steep slope.