How can I stop this?

There is a HV/EV button if I'm correct.

Verstuurd vanaf mijn LYA-L09 met Tapatalk

 

You need to remember to do it manually. There is no setting to have it always start in HV mode.
I suppose you could let the traction battery run down. Dealers seem to have that perfected before test drives.

 

No automatic way of doing this. You just have to make habit of hitting HV/EV button right after you push the START button. I do this every winter morning, so I don't use traction battery for heating my car.

 

would it be difficult to enter the software that controls this function?

 

Don't think so. At least currently no such option listed.

Toyota Prius PHV/Prime/V 2nd gen | Carista OBD2 supported vehicles | See what’s available for your car - Carista

Dings & Warnings
Reverse-gear beep
Beep once / Keep beeping while in reverse

Seat belt warning ding (driver)
Enabled / Disabled

Seat belt warning ding (front passenger)
Enabled / Disabled

Seat belt warning ding (rear passengers)
Enabled / Disabled

Ding when key is left in the car
Enabled / Disabled

Ding when key is out of the car and ignition is on
Yes / No

Ding when headlights are left on
Yes / No

"Master caution" light
On / Off

Remote low battery warning
On / Off

Driver Assist
Pre-Collision System (PCS) sensitivity: remember last state
Enabled / Disabled

Default distance for Pre-Collision System (PCS) alarm when the PCS switch is turned off and back on
Far / Remember last distance

Default distance for Pre-Collision System (PCS) alarm when the ignition is turned on with the PCS switch off
Far / Remember last distance

Default distance for Pre-Collision System (PCS) alarm when the ignition is turned on with the PCS switch on
Far / Remember last distance

Heater & A/C
Remote-start A/C from remote via…
Off / Double long press / Long press / Double click / Single click

Remote-stop A/C from remote via…
Off / Double long press / Long press / Double click / Single click

Auto-turn on A/C when AUTO button pressed (if needed)
Yes / No

Auto-turn on recirculate mode when A/C is on
Yes / No

Open vents to outside air when ignition is turned off
Yes / No

Auto-increase blower speed when front defroster is on
Yes / No

Open air flow to footwell when AUTO button pressed
Yes / No

Ambient temperature calibration
-3°C / -2°C / -1°C / Normal / +1°C / +2°C / +3°C

Fan speed reaches its target…
Slowly / Normally / Fast

A/C ECO mode
Enabled / Disabled

A/C compressor noise reduction
Enabled / Disabled

S-Flow function
Enabled / Disabled

Instruments: Displays & Nav
Instrument lights dimming sensitivity
Darkest / Darker / Normal / Lighter / Lightest

Instrument lights restoring sensitivity
Darkest / Darker / Normal / Lighter / Lightest

Engine start indicator
On / Off

Speed limit in dashboard
On / Off

Display odometer after ignition is turned off for…
30 seconds / 1 minute / 10 minutes / Off

Lights: Automatic
Automatic High-beam System (AHS)
Enabled / Disabled

Auto headlights activation threshold
Darkest / Darker / Normal / Lighter / Lightest

Headlights in residential area mode
Yes / No

Lights: Exterior
Lane-change turn signal auto-flasher count
Off / 3 flashes / 4 flashes / 5 flashes / 6 flashes / 7 flashes

Turn signal click volume
Low / Medium / High

Coming-home lights duration
30 seconds / 60 seconds / 90 seconds / 120 seconds

Lights: Interior
Interior light control
Enabled / Disabled

Turn on interior lights when you shut off engine
Yes / No

Turn on interior lights when you unlock doors
Yes / No

Turn on interior lights when smart key in range
Yes / No

Dim interior lights after…
7 seconds / 15 seconds / 30 seconds

Interior footlight (bright when doors open, dim when driving)
Yes / No

Turn on interior door-handle & center console lights dimly (flood lights) when ignition is on and shifter is not in park (P)
Yes / No

Locking: Automatic
Wireless door locking
Enabled / Disabled

Re-lock doors automatically if you unlock, but don't open a door within…
30 seconds / 60 seconds / 120 seconds

Locking: Beep & Blink
Blink turn signals when locking/unlocking with remote
Yes / No

Locking: Doors & Alarm
Max number of consecutive lock/unlock cycles via touch sensor
Unlimited / 2 times

Warn (beep) when door can't be locked because it's still open
Yes / No

Warn (beep) when a window is still open when locking doors
Yes / No

Warn (beep) when sunroof is still open when locking doors
Yes / No

Locking: Smart Key
Stop monitoring for car key signal after…
0 - 5 days

Touch-to-unlock-doors minimum duration
Off / Short / Medium / Long

After locking with smart key, don't allow re-opening within…
0.5 seconds / 1.5 seconds / 2.5 seconds / 5 seconds

Smart key location to start car
Front seats / Anywhere in vehicle

Open trunk via smart access button
Disabled / Double click / Long press

Mirrors
Auto fold side-view mirrors (req. power folding mirrors)
With ignition / With door locks / Disabled

Windows & Sunroof
Open windows and sunroof via long-press on remote
On / Off

Close windows and sunroof via long-press on remote
On / Off

Open windows and sunroof by turning and holding key in door lock
On / Off

Close windows and sunroof by turning and holding key in door lock
On / Off

Beep when opening/closing windows with remote
Yes / No

Open driver's window using single button press
Yes / No

Close driver's window using single button press
Yes / No

Open passenger's window using single button press
Yes / No

Close passenger's window using single button press
Yes / No

Open rear left window using single button press
Yes / No

Rear-left window single-touch-close
Yes / No

Open rear right window using single button press
Yes / No

Rear-right window single-touch-close
Yes / No

Passenger window single-touch-open from driver's switch
Yes / No

Passenger window single-touch-close from driver's switch
Yes / No

Rear-left window single-touch-open from driver's switch
Yes / No

Rear-left window single-touch-close from driver's switch
Yes / No

Rear-right window single-touch-open from driver's switch
Yes / No

Rear-right window single-touch-close from driver's switch
Yes / No

Wipers & Washer
Automatic wipers (using rain sensor)
Yes / No

 

Yeah, there are few items listed on Carista web site specifically under PRIME customization that seem not to apply.

Like...
Smart key location to start car
Front seats / Anywhere in vehicle

Open trunk via smart access button
Disabled / Double click / Long press

Mirrors
Auto fold side-view mirrors (req. power folding mirrors)
With ignition / With door locks / Disabled

 

I can see how it might be nice to start in HV in certain situations. But the car is designed with low emissions being the primary objective. Hence there is no option to change that even with Techstream.

 

Oh, does it means unlock the trunk with the fob? I thought it meant power lift to open the trunk with the dedicated key on the fob, which PRIME does not have.

 

Hummm, I looked up the manual. It seems SKS can be configured to open just driver door or all three. I wonder with Carista, you can selectively disable just trunk from SKS or change the way to open it to Double click or Long press instead of default single press to open all three doors? Carista list has no mentioning of other doors (Driver's and Front Passenger Doors) being customizable.

From Carista:
Open trunk via smart access button
Disabled / Double click / Long press

 

I bought Carista recently, but have not installed the app yet. When I do, I have 30 days to play with it. Maybe when the weather is better, like next spring, I will let you know the answer.

I have not changed any of SKS setting myself since. I have to try it later, but IIRC, it came with single click to unlock all three doors. I almost never use the fob button to open the door or trunk. So it guess it really does not matter to me double or long press.

 

Oh, I thought double click or long-press on the fob. On the hatch button, I don't remember ever doing dobule click, so it must be a long-press, but it may be a single press. I don't remember. I don't lock my car that often.

 

That's to turn off auto High beam when car is below 25MPH. It's assumed that you are driving through residential area and shouldn't need to shine high beam through people's windows.
If you see your auto high beam turns off when you slow down at a turn, that's what this is.