Toyota Techstream and MVCI

[gstoneburn]

Install help?

I have installed & reinstalled the software. It seems to get hung up on the TISKEY. Any solutions?

Thanks.

[Carbon]

Originally Posted by Phrede

I see that now in the wiring diagrams. Considering 3 relays used, I'm not sure I agree with simple. It does make the power used simple to figure. 50% of full on. I've never seen that concept before.

If the lamps were to have the same resistance in each state, the power to the lamps would be 12.5% compared to powering the lamps in parallel. Since the bulb resistance is lower when the filaments are cooler, the power consumption will be more than 12.5%. Maybe it could be 50%-- if the cooler DRL-mode filaments have 25% as much resistance as the full-brightess filament.

So two 2 ohm filaments across 12 volts draw 72 watts. In series, two identical bulbs see 6 volts each. So to generate 18 watts each or 72 watts total, each filament would have its resistance down to 0.5 ohms.

[Rickl]

Neglecting the change in resistance as temperature changes, here is a simpler way of looking at things.

The bulbs 65w rating will be at 13.8V, so filament resistance is (13.8 *13.8 /65) (R=V*V/P) or 2.93 ohms.

When the bulbs are in series the voltage across each bulb is 6.9V. The power dissipated across each bulb is (6.9*6.9/2.93) (P=V*V/R) or 16 watts.

So putting the bulbs in series changes the power from 65 Watts to 16 Watts (for a single bulb), which is 25% of normal. If we account for both bulbs the power drops from 130 Watts to 32 Watts, which is also 25%.

If we assume the cooler filament had 25% of the resistance (.7325 ohms), then the power across each bulb is (6.9*6.9/.7325) or 65 watts. This means it would be running at normal brightness again, which we know from observation is not true. So the true wattage of the bulbs in series is somewhere between 25% and 100%. We would need to measure the current to get an accurate measurement.

[JuneBug]

Originally Posted by Phrede

I see that now in the wiring diagrams. Considering 3 relays used, I'm not sure I agree with simple. It does make the power used simple to figure. 50% of full on. I've never seen that concept before.

Really? My daughter's '97 Chevy Cavalier had DRL's exactly like that .

[Phrede]

Originally Posted by Carbon

If the lamps were to have the same resistance in each state, the power to the lamps would be 12.5% compared to powering the lamps in parallel. Since the bulb resistance is lower when the filaments are cooler, the power consumption will be more than 12.5%. Maybe it could be 50%-- if the cooler DRL-mode filaments have 25% as much resistance as the full-brightess filament.

So two 2 ohm filaments across 12 volts draw 72 watts. In series, two identical bulbs see 6 volts each. So to generate 18 watts each or 72 watts total, each filament would have its resistance down to 0.5 ohms.

After looking up the Voltage v Current curve for a typical incandescent bulb, I see that there was an error in my thinking. Using the curve for a typical bulb the current at 50% voltage is about 80%. With that in mind, at full voltage (12.8Vdc) 2 65W (9005) bulbs consume 130W total (about 5.08A each). At 50% voltage the total current is about 4.06A or 52W total.

So the DRLs consume about 40% (52/130) of full power, not the 50% I previously thought. I do not have a curve for the exact bulb so there are some assumptions being made.

If they were 2 purely resistive loads, 65W/12.8V=5.08A, 12.8V/5.08A=2.52 ohms in each branch. In series the total resistance is 2.52*2=5.04 ohms 12.8V/5.04ohms=2.54A, 12.8V*2.54A=32.5W or 25% of full power total.

[grmuller]

Originally Posted by ikkoku

do you guys save your stuff at the end? It asked me if I wanted to save the changes and I said no. Hopefully the changes will stick.

You need to click yes

[grmuller]

Originally Posted by gstoneburn

Install help?

I have installed & reinstalled the software. It seems to get hung up on the TISKEY. Any solutions?

Thanks.

What exactly are you doing and on what type of computer. I had that same problem on a vista but none on a straight xp.
On the new version 7.31.00 software I install the software, installed the new driver and then copied the main menu file into the software following the directions in the activation file. I did not have to enter the key.

[Legion]

Quote:
Originally Posted by Legioona
Any way of disabling the annoying five beeps at startup (if you are not buckled up) with the Techstream software?

Originally Posted by avs

Yes

How?

[grmuller]

For those that have Window 7 home edition or window vista and want to use the Techstream software he is a link that shows you how to set up a virtual XP mode in either of those enviroments.
Create an XP Mode for Windows 7 Home Versions & Vista - How-To Geek

I have done this on a vista machine and it works great.

[Songdog]

Does anyone have experience with installing the software on a Windows 8 machine?