Pre 03 Factory NAV to Double Din, Climate Knobs Conversion?

[pfran42]

I have read every thread on this forum dealing with whether converting a pre-03 LC from factory NAV to double din with separate climate knobs is possible. What I took from all of this was that the experts on Mud thought it was possible but it would take a great deal of research, time, money and effort. There are some that think that it would be possible using components sourced from European models.

I pulled my NAV unit and took a bunch of pictures so I am hoping that our fellow Mudders can take a look at what I have for wiring harness connections and tell me if they think it is possible.

I plan on keeping my LC for many years and it would greatly increase my vehicle's reliability if I had separate NAV, climate and audio functionality.

Please post anything that would contribute to making this goal possible. Sorry about the pictures. I only had my Nexus One on me when I started this.

Here is what I started with:

In order to get to the NAV/Climate/Audio unit, start by prying off the trim panel. I used a putty knife wrapped in a chewing gum box to protect the trim.

Once the trim panel is off you can see that there is a connection running from the harness that connects hazards, center diff, power antenna, outside temp, time, time set buttons, rear defrost, rear fan, and heated mirrors.

Here is what I found on this connector:

After unplugging the connector for the front trim piece, remove the 4 screws surrounding the unit and gently pull in out. There are basically 3 rows of connections on the back of the unit.

Finally, remove the connections for Main and Sub antennas.

 

[pfran42]

Once I got the unit out, I noticed that it was split into 3 components:

1-MFP (Multi-Function Panel)
2-Physical audio controls
3-A black plastic box behind the MFP

It also looks like the rows of connections might correspond to grouped functionality.

EDIT 2/17/11 - Looks like the black box on the back of the MFD is part of climate control - (88650B AMPLIFIER ASSY, AIRCONDITIONER 88650-60590 2000.08-2002.08 UZJ100)

A-MFP (Multi-Function Panel)?
B-A/C Amplifier Assembly --- (verified)
C-To Amp (left) and CD/DVD Changer (right) ---(verified)

NOTE: NOT SURE ABOUT THE BACK BUT IT DOES APPEAR TO FOLLOW A GROUPING PATTERN OF SOME SORT.

Here are some additional pictures of the unit showing various codes, numbers, etc.

Bottom view
Looks like this is the Pioneer receiver assembly (86120 RECEIVER ASSY, RADIO 86120-60280 2000.08-2002.08 UZJ100)

 

[pfran42]

I know that in order for this conversion to work, a new front trim piece will be required which moves the strip with the power antenna, clock, temp, etc. up higher so that the physical climate controls can go underneath. If this piece has the same connector as mine (an I would imagine it would) the this part of the equation is already solved.

Are there any experts out there who could take a look at the back of the unit and tell me if they still think this conversion is possible?

I will fill in more details and take better pictures of the connectors over the weekend. I just wanted to get the ball rolling on this as I imagine it is going to be a long-term project.

Any input would be much appreciated!

 

[Trunk Monkey]

I found this from in the EPC for a US '02. The buttons aren't that expensive, $91, however the circuit board behind it is $695. Looking at part 88650, it appears to have two harness connections. It would be interesting to see if those two are also used in the MFD or if they're unused but sitting in the harness.

EDIT - added the harness connections. Don't see two that would clearly be it.

 

[SupraTuRD]

Good investigative work Pfran... now if we could get someone with a non-navi LC to take their dash apart and take good pics and post like you did. =)

 

[Topmounter]

Curiosity killed the cat

 

[pfran42]

I found this from in the EPC for a US '02. The buttons aren't that expensive, $91, however the circuit board behind it is $695. Looking at part 88650, it appears to have two harness connections. It would be interesting to see if those two are also used in the MFD or if they're unused but sitting in the harness.

EDIT - added the harness connections. Don't see two that would clearly be it.

That center picture with the curve of the center console looks like it is from an 03+. I really need a member to post pics of their 99-02 (without NAV) with the center trim piece off and then with the radio and climate knob cluster pulled. I am not very skilled with ripping into car dashboards but this was EXTREMELY easy to to. It could easily be done in 30 minutes (including taking pics and putting it back together). Plus, it requires no new parts! Everything is either a clip or one of 4 screws.

Please help us 01/02 hundy owners out so that we accurately gauge the viability of this conversion.

Thanks!

 

[pfran42]

There is a 98-02 dash trim panel with climate control knobs on E-bay right now. Here are the pics I scraped. Now all I have to do is figure out if there is a chance that the wiring will work:

 

[pfran42]

Looks like Trunk was right about the images he uploaded. Here is another variation of separate climate controls. Anyone have pictures of the backside showing a detailed images of the connectors?

 

[uHu]

Go with the three rotary controls if you can make it work.
The other type, with push-buttons - and an endless rotary for temp, is a pain to use. No tactile feedback, and you have to actually see and read the little display to see if you are doing what you want to do. Piece of crap.
The three rotary controls can be managed without looking, and you can feel exactly what you're doing.

 

[2000UZJ]

Go with the three rotary controls if you can make it work.
The other type, with push-buttons - and an endless rotary for temp, is a pain to use. No tactile feedback, and you have to actually see and read the little display to see if you are doing what you want to do. Piece of crap.
The three rotary controls can be managed without looking, and you can feel exactly what you're doing.

x2, I like the rotary controls. I just love the 100, so much stuff, yet so simple and effective.

I will have my dash apart in a couple weeks and told Pfran he could take a peak at my dash to see since I have the rotary controls and no nav.

 

[jgray]

I may pull mine apart this weekend and I'll take pics if I do... I most likely will as i'm wiring up my brake controller...

 

[yota2188]

Subscribed!

 

[RobRed]

I think this is doable. The controllers from the 2002 NAV may not have the same plugs as the old non-NAV 100"s but i'll bet the wiring is the same... meaning you could source the connectors and build an adapter harness (or 3) to make the swap work.

Lexi4Darin and I have been looking at this for quite some time and we came to think that the Lexus Electronic controller would be most compatible conversion from an MFD equipped 100.

 

[lexi4darin]

Ya, I'll get around to pics real soon. Need to update my Nakamichi radio anyway.

 

[OregonLC]

Lexi4Darin and I have been looking at this for quite some time and we came to think that the Lexus Electronic controller would be most compatible conversion from an MFD equipped 100.

I would think that the pinouts would be the same. Unless I'm mistaken, only the presentation is different. Both are completely electronic, one just has the nice, easy to use round dials.

Otherwise, that would mean that Toyota had three harness types - Nav, Non-Nav LX, Non-Nav LC.

 

[pfran42]

I think this is doable. The controllers from the 2002 NAV may not have the same plugs as the old non-NAV 100"s but i'll bet the wiring is the same... meaning you could source the connectors and build an adapter harness (or 3) to make the swap work.

Lexi4Darin and I have been looking at this for quite some time and we came to think that the Lexus Electronic controller would be most compatible conversion from an MFD equipped 100.

I am also thinking that it will be easier with the Lexus controls as they are a little newer. From looking at the connectors from the (older) unit on eBay, I can't make a good educated guess on how it would plug in to my harness.

I may pull mine apart this weekend and I'll take pics if I do... I most likely will as i'm wiring up my brake controller...

Thanks! This is much appreciated!

Ya, I'll get around to pics real soon. Need to update my Nakamichi radio anyway.

Looking forward to it! After we get a good look at the connections and detailed pics of the pinouts, I will have to find a wiring diagram for this model of control panel. Can you also get detailed pics of the part number information?

I would think that the pinouts would be the same. Unless I'm mistaken, only the presentation is different. Both are completely electronic, one just has the nice, easy to use round dials.

Otherwise, that would mean that Toyota had three harness types - Nav, Non-Nav LX, Non-Nav LC.

I would hope that they have the same harness for each year (for the US market) and then just leave parts disconnected for options that are not present. When you think of it, there were only a couple of options to begin with. It would have made sense to have a universal wiring harness.

Anyone know the part number for the Lexus non-NAV climate control panel?

 

[lexi4darin]

Someone can post but I'll also get pics of the part nums when I get the fascia off. Looks like I better order a new radio to justify the disassemble.

Thanks guys; exactly the excuse I needed.

 

[pfran42]

Here is a better picture of the pinouts from a 98-00 climate control panel. I also got some part number information for this piece:

Part #’s:
Off Climate Control # 88650-60400 & Denso#177300-3632
Off Back of Climate Control#84010-60170 & 110900-0072 A
OEM#84013-60010 (Panel, Upper Finish)

 

[pfran42]

Here is what I believe to be the pinouts for a 2004 Non-NAV AC Control Assembly