[ KB ] EV Button Installation Instructions

I just picked up my salsa red package 9 '04 Prius a couple weeks ago, and am very excited to make this mod. I have a few questions and suggestions.
Does anyone know the part number for the connector that plugs into the HV ECU (slot 14) (the one that you modify pin 27 on).
And if you know if that connector is available... is there a female connector available also.
If so, my suggestion is to make a very short patch cable using those 2 connectors. If this patch cable was the length of the 2 connectors plus 1 inch or so of wire, would there be room for it inside the dash?
I have not yet taken my dash apart to look.
Once you have the patch cable, you insert the wires for the EV switch into it and do not modify the existing wires/connectors at all. This way your entire assembly is easily removable, leaving a pristine wiring assembly if and when you decide you need to remove your EV switch.

Comments?

Electrick
2004 Salsa Red, Package #9
adopted 04/19/2004

 

Please take a look at this pic, I think this will make it more clear:



My idea was to leave the existing wiring and connector completely untouched and make it fast to undo. Although I guess since you have to take the dash apart to get at it, its never going to be fast.

It may be just added complexity, and after a few days of getting used to the idea of modifying my new car I wont worry about it so much.

Thanks
Electrick

 

Anybody know how to do this to an '01?

 

Got mine partly installed. Thanks to Toyota of Japan!

Then I got a bit worried when I hooked the battery back up and my gas gauge read empty on a full tank! I finally found the note in the owners manual about that! Gas gauge started functioning after 3 miles or so of driving!

Anyways my button is in and it lights up but no function yet. Have more to do to get
the darn wire across the dash board! So just that one left to do.

===========================
Jan 8:
Got my last wire in! Used a screwdriver on the terminal and
then pliers to crimp. No solder. Had open connection. Squeezed harder
with pliers and got continuity. Pliers on side so little knives would cut into
wire. (I used 26 wire, which was a bit small for the connector.)

Went on a test drive to warm car since I just got triple beeps due to temp
low. After warm up everything worked great. Noticed this time the
gas gauge did not get lost like the first time I took off the battery.

EV button is great, esp when in parking lots! Seems like one of the
best uses: Why warm engine on idle, or try to keep it warm when you
are about to shut down.

 

I've got this mostly done. Thanks to everyone who posted their experiences - it couldn't have been done without the excellent tutorials.

I managed to melt my pushbutton switch while soldering, so now I've got two wires sticking out of the hole, but when I short them together for a moment, EV mode kicks in and works as advertised.

A couple of notes:

1. I grounded to a 12MM bolt right next to all the ECU harnesses. The bolt is located directly behind where the passenger vent would be. It looks like that's a good ground - all the metal cases for the plugs connect to that whole metal area. Does anyone see a problem with this?

2. Be very careful of sharp edges near the plug that you tap into. I sliced up the back of my hand pretty good last night.

3. I had a hard time getting the plug back into the jack after adding the necessary pin. It just would not go in. I thought something went horribly wrong (bent pin or the newly added pin wasn't the right size). But after a bit, I realized that I hadn't pushed the pin retainer all the way flush with the plug.

4. Cuts on the back of the hand tend to bleed profusely.

All in all, the install went smooth (so far anyway). I'd rate it at about a 6 out of 10 for difficulty. It took about two hours what with the soldering difficulties and the bleeding.


Thanks Again to everyone who contributed to these posts.

DGStan

 

I donate five points to you for band-aids!

 

I thought you all might like to see how it turned out. I'll try to attach a picture here. I hope the picture looks OK (it's from my Moto V505).

What you see is the EV button with a rocker switch right below it. The rocker is a DPST that controls the Phone/NAV speed sensor defeat. It all pulls out and can be disconnected easily. I purchased the smallest rocker and button I could find (that still looked decent). They barely fit into the plastic blank.

I thought about locating the Phone/NAV switch elsewhere, perhaps somewhere a passenger could reach it, but I came to the conclusion that this location was the cheapest part of the car to modify and, in case something went wrong, restore back to factory condition.

Installation wasn't too hard, provided you posess the mad Dremel skills. The hardest part (aside from controlling the bleeding), was tapping into the Phone/NAV wires next to the MFD. There's not a whole lot of slack in the wires for stripping/splicing.

I even bought a new plastic blank ($5.00) that will restore the "stock" look if I ever need to reverse the changes.

Again, I couldn't have done it without all of the groundwork laid by you guys!


Thanks Again,

DGStan

 

Doctor,

Thanks for the kind words. I think it looks pretty good, but the best part is that it all works as advertised!

1). The P/N for the OEM blank is: 5553948010 (Cover, Spare - $5.02 list)

2.) I purchased the parts at Action Electronics in Santa Ana, CA. Their phone number is: (800) 563-9405.

The rocker switch is made by Philmore (LKG Industries), P/N 30-043 ($4.29). I used terminals by Noble (P/N 508M Female .187x.020 - 2 per pkg.) to connect to the switch ($.88 x2).

The pushbutton was loose and therefore had no packaging, so I don't know the MFG or P/N. However, the receipt says "GC-35-411 pkg switch" ($2.45). It is a momentary on button.


Action Electronics has a website (Action Electronics) so if you can't find these parts local, you might be able to order online.

If you do end up dealing with Action and they can't identify the pushbutton, my receipt number is 268601. Maybe they could look it up that way. I hope that's not too much information.


DGStan

 

Thanks for the info dgstan.

No search available on site for Action Electronics.

Did a Google for GC-35-411 and got about 10 results. Most likely candidate seems to be this switch. from Unicorn Electronics (model GC 35-411, without the leading hyphen). It says that this is N O momentary, is that correct?

 

Yeah, that sure looks like the one.

"N O" means "normally open", which is what the switch needs to be. Momentary means that it's not On/Off (like, for example, the pushbutton switch right here on the front of my computer monitor), but just a quick short when it's pushed (like your Homelink buttons).


DGStan

 

I must be cheaper and lazier than you guys. I didn't want to screw with drilling through the reinforcing blades, and I didn't want to look for an extra oem plug. So I traced my oem plug onto a yardstick, trimmed it to fit snug, drilled a 1/2" hole in it, painted it black, and finished it with polyurethane. I have my original plug to restore to factory condition, and the swith backing cost me nothing - the yardstick was a freebie from a camping show! I also soldered in a pair of connectors a couple inches off the switch so I can do a quick disconnect/reconnect if needed.

It's not as elegant as the plastic blank, but a lot less bloody than trying to drill out those reinforcing blades. Although if the yardstick is a little too thick, you might need to sand it down a little to screw the switch's nut on.

 

All the links I am finding for EV button installation instructions go to non-existant pages. Can anyone point me to a working link. I have a 2007 Prius.

 

Thanks. Is the 2004 connections the same as a 2007?