Retro-fitting factory cruise control

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Joined
Dec 24, 2019
Threads
26
Messages
1,080
Location
Sydney, Australia
So my 80 series doesn't have cruise control. I find it mildly annoying, as I do a lot of long drives, and I appreciate being able to regulate my speed on the motorways with a flick of my finger, and give my foot a rest. Most 80's here in Australia didn't have cruise control however, and models with the 1HZ engine like mine were never fitted with it. I wasn't going to bother with the hassle and cost of tracking down all the parts to retro-fit it to my rig. Until yesterday that is, when I walked into the self-serve wrecker to pull a few bits off a high end VX model they had recently got in. Then I noticed the rig had the factory cruise control, and it was for the 1HDT diesel engine too, so everything was right for the 1HZ diesel in my rig. I might still have passed, as I'm a bit strapped for cash right now, until I found out the whole thing, with the actuator, link cables, and computer, would only set me back $66. At that price I couldn't resist, so I now have everything I need for a cruise control setup..... except the stalk for the steering wheel, since someone else already made off with the combination switch, and the cruise control lever was attached to it in this model (92), like this:
1622116120868.png


So I've got the entire system, minus a few glorified switches. I'm not too sad about that though, because I don't think I actually want this version of the switch. I like cruise control, I use it a lot where it's present, but every car I've ever driven with cruise control has the control stalk for cruise on the wheel itself, not the combination switch, so the controls rotate with the wheel. I think this is far more practical. Toyota switched to this approach on the 80 and LX450 for later models. I like my current wheel, which looks like this:
1622116777771.png


It's a good, solid, sturdy wheel, with no leather or any other stuff that wears badly over time. It's also totally incompatible with having a cruise control lever on the wheel though as it stands. I could go down the rabbit hole of looking at modifying it, but I thought I'd see what other wheels are out there though and see if there's something that would be a logical swap. The most common one seems to be this four spoke design:
1622117518081.png

This has the lever on the wheel, and supports the "clock spring" arrangement at the back to pass the signals through (which my wheel above won't), but I haven't been able to confirm if there's any model that has cruise control that doesn't also have airbags. There are a lot of different steering wheels listed in the parts catalog, and most of them I can't find images of online. I want one that doesn't have "SRS Airbag" plastered onto the front, as my car doesn't have airbags, I don't want airbags, and having a wheel attached to it that claims an airbag is fitted when none is present or functioning could cause me some grief for the yearly safety inspections I'm required to do here. I'd also prefer a wheel that wasn't leather. I think I could make this wheel from a J90 Landcruiser Prado work (which didn't get released in the US):

1622118456396.png


Before I jump to a totally different series though, I thought I'd ask if anyone knew of a good option here I'm missing? I basically want a wheel that'll be compatible with the 80 series, that has a cruise control stalk on the wheel, without an airbag, or at least, without any badging on the front indicating an airbag is present. I think I prefer three spoke over four as it's not as "chunky", but honestly I'd look at any options.

So, what have you guys seen out there in the wild? It doesn't have to be restricted to 80 series models either, as long as it's genuine Toyota, and it'll physically fit on the 80 series.
 
Why not just use the the 80 steering wheel remove the airbag and have a shop make up a new center part to fill in where the airbag was.
 
Why not just use the the 80 steering wheel remove the airbag and have a shop make up a new center part to fill in where the airbag was.
I could go that route, but I'd be more likely to try and modify the three spoke version to add a clock spring and mount a switch, especially because I have a spare one in my garage I could mess with. Before putting in that kind of time and effort though, I'm asking here to see if there's a better "bolt on" solution out there. Maybe there's a four spoke wheel that didn't include the airbag for example, which has a different centre plate that isn't marked with the SRS airbag text? I'm asking here to see if someone knows of an existing part that can save me the hassle of trying to fabricate something myself.
 
I was only suggesting it might be easier to use the 4 spoke. I found I tend to make my jobs harder every time I try to mod something.Mind you it dosn't stop from doing it anyways.
 
Pick 'N Payless in Blacktown (Western Sydney, Australia):
One of the few self-serve wreckers still around in Sydney, and certainly the most organised. When I was living in Adelaide, I also went to U Pull It, they're pretty good:
There are plenty of wreckers you can call for parts, but I prefer to poke around the cars myself and see what catches my eye. Not only does it work out a lot cheaper I find, you get to properly gauge condition, and if it's something you're less familiar with, take plenty of pictures so you can see how to reinstall it yourself later. I also do a better job removing the parts without wrecking them than the guys who are on a clock to strip a car per hour.
 
In the US, 1991-1994 Land Cruisers had cruise but no airbags. Seems like in aus it would be similar and fairly easy to find?

the 4-spoke one you posted is for 1995-1997 with airbags standard.


1993 wheel: 80 Series Steering Wheels - https://forum.ih8mud.com/threads/80-series-steering-wheels.606139/
 
Last edited:
In the US, 1991-1994 Land Cruisers had cruise but no airbags. Seems like in aus it would be similar and fairly easy to find?

the 4-spoke one you posted is for 1995-1997 with airbags standard.


1993 wheel: 80 Series Steering Wheels - https://forum.ih8mud.com/threads/80-series-steering-wheels.606139/

But the cruise stalk is on the column for those years, he wants it on the wheel like later years....

Jason
 
But the cruise stalk is on the column for those years, he wants it on the wheel like later years....

Jason
Thanks, missed that nuance in the post.
 
Thought I'd update this with my cruise control adventures so far. So I've successfully fit my HZJ80 with factory cruise control now.... kinda:
20210605_203442_resize.jpg

I wish I could say it's one of the dodgiest things I've done, but honestly I've done plenty worse. :lol:

I picked up a couple of those 90 series Prado wheels from a wrecker and messed around with them a bit. It did bolt right on, and it was possible to get it all working, but I decided I just didn't like the wheel. The leather ones are all shot now, and I don't like the maintenance involved. That three spoke design was only alternatively available in polyurethane though, which feels too soft and gummy to me, and has discoloured from the sun. I like my polypropylene (vinyl) 80 series steering wheel, so I've decided to keep it and go with the stalk on the column. I've got a line on a stalk, but it's not here yet. In the mean time, I've rigged up the four switches using the temporary solution you see before you, which allowed me to test it out and verify it's all working properly.

The HZJ80, with the 1HZ engine, was never available with cruise control as an option in any market as far as I can see, so this is probably one of only a few times this has ever been done. I'm happy to report it works without issue. The wiring harness had all the plugs there and waiting. The cruise control actuator bolted right in, and since it came off a HDJ80 with the 1HD-T, which is basically the same engine with a turbo and a few tweaks, the accelerator cables were the right length. The cruise computer bolted in, but I had to go back to pick up the small metal bracket it bolted into, which in tern bolted onto the side of the accelerator pedal. I picked up the brake pedal switch from the donor vehicle too, as ones fitted with cruise control have four contacts, rather than just the two contacts on other vehicles. The donor vehicle was an auto, so unfortunately it didn't have the switch that goes on the clutch pedal to disengage cruise when the clutch is pressed. It was also used on a particular early model Camry here, but I couldn't find it at the local wreckers. Fortunately, I did find an aftermarket switch on a wreck which did the job nicely. Luckily, on the 80 factory harness the plug comes with a small shorted terminator when no cruise control is fitted (which stops cruise engaging until you pull it), so I was able to snip the loopback wire and use it to make a converter harness that plugs the aftermarket switch into the factory harness, which worked a treat. The donor vehicle used a speed sensor which attached to the mechanical speedo cable in the early models, but I didn't need to mess around with that since the newer models all have an electric speedo, and the same sensor feed that goes to the cluster also goes to the cruise computer, and is compatible.

The biggest wrinkle I had was due to wiring. The cruise computer I got is from a 91 model, and has five separate wires for the four separate switches plus ground on the cruise control stalk. When they switched to the stalk on the wheel from 92 onwards, they combined three of those signals into one using some resistors to shift the voltage, and decode it at the cruise computer. When they did that, they also removed the extra pins from the wiring harness. I could have dropped a later model cruise computer in if I had one to fix the problem, but I didn't, so instead I went back to an early model wreck, unwrapped the harness, removed the two wires, and grafted them into my later model harness. Since I was able to remove the complete runs from plug to plug, I didn't have to splice anything, they're the factory crimped wires with the correct colour codes, which is nice. I swapped one pin position over to make it correct, so now my 96 model wiring harness is correct for the 90-91 model cruise control, which I can undo anytime I choose.

Another wrinkle I had was the dash lights. The "plate" for the indicator lights on the left side of the cluster didn't have the cruise control slot populated. It was a black fill, so even though the bulb functioned, you wouldn't be able to see anything. None of the plates I've collected matched the layout for my 1HZ. It's possible a late model HDJ80 would have a compatible, but I haven't got a plate from one of those. Instead, I carefully cut out the section with the cruise light and a bit extra from a spare plate, and cut the blank section out of my one, while leaving it connected at the bottom, and wedged the cruise panel behind the cutout. Works a treat, and isn't too noticeable.
20210605_212858_resized.jpg

If I come across a cluster from a late model HDJ80 I'll have to compare the panels, to see if I can replace my modified version with a complete one from the factory.

Haven't done a serious drive with it yet, but I'm going to be doing a long drive early next week over a few days with a lot of freeway driving, so it'll be a good chance for me to use it a bit in a real driving situation. When I get the proper stalk and graft that in, I'll give an update on the end result.
 
Last edited:
Looks well done and an extremely satisfying project!
 
Got back yesterday from my little trip. Thought I'd share some obligatory picks, especially since a lot of US users here have probably never seen much of the great land down under:
20210609_110712_resized.jpg

20210609_115636_resized.jpg

20210609_141727_resized.jpg


I drove for a bit over three hours on highways, but once I got to my destination I spent a fair bit of time hunting for a place I went to 30 years ago. I was pretty remote really. Not middle of the outback remote, but there were only a couple of people on rural properties a few dozen kms away, and I was by myself, so I didn't get into too much rough stuff. I was looking for a location anyway, not going on a 4wd expedition for the sake of it, but I did have to go along a lot of seldom maintained farm and fire trails to get where I was going, as well as some straight up cross-country and bush bashing, so it turned into a bit more of a rough and tumble than I'd planned, but I came well enough prepared. My 80 in its natural habitat:
20210609_101306_resized.jpg


Towards the end I was pressed for time, so I was tearing along some of the trails much faster than is advisable. And since I hadn't taken many pictures, and I didn't have a dashcam, I thought it would be a great idea to hold my phone in my dominant hand over the wheel capturing some shaky cam footage, while tearing along wet fire trails running along ridgelines:



Fortunately this had no ill effects whatsoever:



The cruise control performed quite well, even with my dodgy poor man's control switch. I did run into two issues:

1. The cruise control on gentle downhill slopes would have a habit of "pulsing", overshooting the set speed, then overcorrecting and undershooting, and get stuck in a pattern of shifting the accelerator every half a second or so. Never driven an 80 with cruise before so no idea if this is normal, but from some searching here people suggested making sure there's no slack on the cables. I only just installed them so I think they were good, but I'll be doublechecking that. I honestly thought it might just be the result of dumb early 90's electronics, so if anyone can confirm if this is normal or curable, that'd be good to know.

2. The cruise control errored out twice while driving when trying to set the speed. Got a flashing cruise light on the dash, then couldn't re-enable cruise. Having a HZJ80 with a fully mechanical drivetrain, I just depressed the clutch and turned off the ignition while cruising at 100km, kept it off for a second to reset the cruise computer, popped the ignition back to "on" and popped the clutch to turn over the engine again. Didn't bother to stop or pull out codes, I was on a tight schedule. That cleared the error state and got me going again. If it happens again when I have more time I'll pull over and read the diagnostic code to see what made it unhappy.
 
Impressive work.
 
I have been trying to do the same thing on my 95 1hz 80 that I brought back to Canada when I moved home from Perth. I have a 90 1hdt 80 series from Japan I have taken the engine out and will be fitting to my 95 and it had cruise controls in it and wanted it in mine. I hit the same problem with the cruise plate on the dash and couldn’t find a solution. I got everything in….actuator and throttle linkages as well as the computer and stock switch in but I can only get the computer to click and nothing more. Didn’t know about the loopback wire in the 1hz or a few other things you had mentioned and will be looking into them when I’m done my swing at work. Thanks for the write well done….might be picking your brain if mine still won’t work.
 
Hey, wasn't sure if this would ever be of use to another human being, but since you're attempting the same thing I'd be happy to help with more info, just ask any questions here. I didn't do a proper write-up on this really, with pictures and a step by step guide of what I did at each point, but I'll try and add more detail to fill in some gaps.

First of all, here's the (almost) complete end result:
1625623268689.png



I still need to glue up the screw mounts for steering column cover with the cruise control switch cutout, which was just ripped off when the combination switch was removed by someone else, but once that's done it'll all be finished.

I got a combination switch from overseas from a LHD model with the cruise control stalk attached. Since my 80 is RHD, it wasn't drop-in since the wipers and indicators are reversed, which I knew before I bought it, but the cruise control switch itself is a separate part that just screws on, and is the same on both LHD and RHD models. I had to do some more wiring changes here though, since the only stalk I could find had the three signals combined into one, while I needed them separate, so I modified the switch to separate the signals:
1625623304562.png

1625623318895.png

Once it's all done and grafted back into my combination switch, it looks pretty much factory:
1625623394155.png

1625623412940.png


With that done, the cruise control install is complete on my rig, and works perfectly. I did have some slack in the accelerator cable, which was probably the cause of my pulsing speed issue, but I only tightened that the other day and haven't done enough driving yet to say if the issue is solved, but I'm optimistic it is. I haven't had any error codes trigger again, so I haven't had to troubleshoot that any further. Since you're doing basically the same kind of conversion, I can tell you it's very much doable, but you'll probably have to revert to cutting those plates to get the light in the cluster like I did. Bit of a pain, definitely something you want to do carefully.

One thing you'll really need to deal with the wiring differences is the proper wiring diagrams. I have every factory wiring diagram here (scanning them is on my to-do list), so I'll take some pictures and post them in this thread in a little bit so you have them to refer to.
 
Now I'll post the electrical wiring diagram info. I have all the 80 series wiring diagrams, so for completeness I'll provide info from all the manuals to cover all the different year models. They changed formats for how they lay this stuff out several times, so comparing can be a bit of a chore, but there's often useful info to be gained by cross-referencing the different years I find.

First of all, here's the relevant pages from the Jan 1990 manual (EWD090F):
1625625211309.png

1625625277502.png

1625625311840.png


And here's the pages from the Dec 1990 supplement (EWD114F):
1625625423566.png

1625625460617.png
 

Users who are viewing this thread

Back
Top Bottom