Retro-fitting factory cruise control (1 Viewer)

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

Hi Mate, nice write up. I am attempting to the same as you. I'm fitting factory cruise control to my 93 1HDT Manual. Haven't had any luck getting it to work as of yet. Just wanted to know if you remember where abouts that loop back wire was located? Struggling to find it on my loom. I did find this taped to the loom next to where the brake light switch wiring exits, (photo attached) is this it?

IMG20211017133405.jpg
 
Interesting, so I hadn't looked too closely at the earlier wiring diagrams I posted above since I was working on a 96 model, but I can see from the diagrams the clutch switch was added for Jan 1995 models onwards. Presumably cruise control was only offered on auto models prior to that year date, but from then on they wanted to at least make it technically possible as an option for manual vehicle models too. What that means for you on a 93 model is you probably have to make a wiring tweak. To test things, disconnect pin 2 from the cruise control ECU. Check the wiring diagrams in my earlier posts to help identify the right one. If everything else is right, that should get your cruise control working (above the cutoff 40km/h). Just be aware it won't disengage if you depress the clutch, so it'll quickly surge your RPMs past the redline if your speed drops while the clutch is depressed.

If it all checks out and you want to add the clutch switch, you'll have to get a switch first of course, for which I'd go with the Toyota 88280-14030 from a later model. This will screw on no worries to your vehicle. Then it's just a matter of routing the wire that goes to pin 2 of the cruise control ECU through that switch. You can get the pigtail for that switch (and probably the switch itself easily enough) from all kinds of vehicles, a pre-2015 RAV4 looking like the easiest source to me, but you could also hit up a 100 series Landcruiser, a Camry from around 2002-2012, lots of sources out there. Any local self-service wrecker should have what you need for a few bucks.
 
Thanks for the information mate, I haven't had time to have another go at trying to get mine working until the weekend. Still no joy however getting mine to work yet, I've fitted the dash light now and pulled the diagnostic codes from it.

Got an Error code 31 "RESUME/ACCEL Switch is ON always when MAIN switch is pushed ON".

I bought all my cruise control components off a bloke who claimed he had it fitted in a 96 model and it was working perfectly. I've since recently done some research and the cruise control computer that was supplied is for 01/90-08/92 model cars going off the part number from it. The switch that he has supplied is the 3 wire type with the resistors inside so I think I need to do the same as you have done and modify the switch to include the 2 extra wires for my 93 model.

Really not sure how he had the late model switch working with the early type ECU or if he's just telling lies.
 
Sounds to me like he's either fibbing, or has more cruise control gear there and got them mixed up. The early model ECU will not work with the later model switch. Depending on the situation and who you got it from, you could see if he does have the later model ECU that you could swap with, as that'd make things much easier on your end. If you need to get it working with what you have, you'll have to not only modify the switch, you'll have to add new wire runs to the dash harness like I did, to get the extra signal lines from the connector on the steering column down to the connector for the ECU. The 90-92 ECU for the HDJ80 is part number 88240-60020, while 92-96 is 88240-60100 or 88240-60101. They then switched to 88240-60190 from August 96 to 98. From what I can see, the latter three (92 onwards) should be interchangeable, but the 90-92 ECU wants the separated switch wiring. There's actually a 88240-60101 ECU going on ebay right now from Lithuania if you want a plug and play solution, but the seller wants over $200AUD, which was too rich for me.
 
Hey Nemeis thanks for the write up.
I have a 94 VX UK model 1HDT Auto.
I’ve been supplied cruise from apparently another 94VX.
ECU however does not match the ones you have listed, I have 88240-60090, do you know what this is from?
I also have the fixed stalk and actuator. Unfortunately when I plugged the stalk in there is no matching wires in the body harness so it looks like I will have to completely wire it from scratch.
Actuator will bolt into existing threads but again the harness does not appear to be there, nor can I find the plug for the ECU or find where it’s supposed to mount.
The dash does not appear to have a cruise control light position.
 
Does anyone have any extra Meter Lens No.2 kicking around? 83146-60240 or 83145-60780 or 83145-60340

I have been trying to get a few to customize for the cluster but apparently they have been discontinued. Just need 2 or 3 [Incase I mess one up] that say Cruise on them. Any help would be awesome thanks
 
Great write up, but I am confused.
I have a 1991 3FE FJ80. I am replacing the combination switch (84310-6A110), but can only get a 95-97 combination switch (84310-6a261).
The 95-97 "works", except for the cruise control.
CC plugs and wiring are totally different.
On the 1991 CC wires are Yellow, Red, Orange, Black and Purple, whereas on the 95-97 the wires are Red, Grey, Brown, Orange and White - and also in different pins in the harness.
**** Is there a way to cross walk the colored wires and pin locations in the harness?.
Green circle = 95-97 combination switch
Red circle = 1991 combination switch

20220913_201923~2.jpg


20220913_201934~2.jpg
 
Yes, you can modify the wiring for the harness. That's what I did in my rig. The back sections of those harnesses flip up, and you can use a pin tool or small flathead screwdriver to unlock individual pins once that's done to remove each crimped wire. Hard to describe in text. There might be a good write-up on that kind of thing somewhere here on MUD or elsewhere? If you have the original combination switch for your rig, you can take the wiring sections you need and swap them over into the new harness.
 
Does the wiring loom fitted into base model 1hz 80's like mine even have any provision to accomodate all the extra stuff necessary for cruise? I personally don't like cruise and never use it on modern vehicles with 'adaptive' cruise but can see how for lots of long highway drives it could be handy. I can't get a headlight retainer into my 80 either.
 
Nemesis1207 said:
Yes, you can modify the wiring for the harness. That's what I did in my rig. The back sections of those harnesses flip up, and you can use a pin tool or small flathead screwdriver to unlock individual pins once that's done to remove each crimped wire. Hard to describe in text. There might be a good write-up on that kind of thing somewhere here on MUD or elsewhere? If you have the original combination switch for your rig, you can take the wiring sections you need and swap them over into the new harness.
Click to expand...
Is there a trick to getting the pins out of the connector?.
 
The flip up lock is the trick. Once you know that's how this one works, this is one of the easiest connectors on the vehicle to repin. I suppose it was intended to be serviceable since the light / wiper / cruise switches have to be depinned to replace. I have a spare somewhere, if I can find it I'll get a pic.

Jason
 
logicbyondreaso said:
Does anyone have a clear image of where the cruise control computer bolts to? I found the harness pigtail but can’t figure out where the 2 mounting points are. Is there an another bracket in addition to the one that is attached the computer itself? An image would be greatly appreciated.
Click to expand...
There is a small angle bracket that attaches to the module and the side of the accelerator pedal. I can't take an image easily right now, but I'll post one when I can.
 
@DivByZero - When you added/modified your cruise control stalk - what number pin position did each color go to on C-16 connector? I have the same colors and want to confirm it's correct as I am not getting the dash light to turn on. I tested the bulb and its healthy.

White - Red
Red
Brown - Blue

I am adding cruise control to my 1997 1HDT. All the wiring was there so it has been relatively straight forward. This is what I have done:

- Added the cruise control ECU (obtained from 1 RHD 1hdt part 88240-60080) Also have a FZJ80 ecu to try.
- Steering wheel controls assembly (84310-6A200)
- Stop light switch with 4 contacts
- Cruise control actuator assembly from 3FE
- Working on cables next.

Cruise control steering wheel switch wires
IMG_1731.jpeg


C16 connector. Wires from switch above come here.
IMG_1736.jpeg


Cruise control ECU pinout from underneath
IMG_1737.jpeg


Left: FZJ80 pigtail from ECU
Right: 1HDT (RHD) pigtail from 88240-60080 ECU
IMG_1740.jpeg
 
Sorry, I didn't keep good records when I did this job, so I don't have any specifics from when I did this on my vehicle, but all I did was follow the wiring diagram, the details of which I posted on the first page in this thread. That has the colour codes and pin numbers included for everything, so you can compare to that.

One thing that might be worth checking though - the clutch pedal switch. I can see your rig is an auto, but since the cruise control wasn't originally fitted, I'm curious if the dummy loop back connector for the clutch pedal switch is present and installed on your rig. If so, it'll stop cruise engaging until it's pulled. That held me up for half a day until I figured it out. You could disconnect pin 2 from the cruise control ecu to test out if that's the issue, or if there's a similar problem with the auto transmission ecu. There's a feed from the auto trans to stop cruise control being enabled if the transmission is in park/neutral. Drives the same pin on the cruise control ecu, pin 2.
 
I did see the comment about the neutral start switch / loopback wire. I removed pin 2 and no change.
The strange part is that the Cruise light will not turn on. I tested the circuit by grounding the bulb via pin 7 and it turned on. So I don't think there is a wiring problem there. I also checked another ecu to verify it was not a faulty. Could I have 2 bad ones - possible but less likely.
I also confirmed that the cruise control functions are wired correctly and inputting signal to the ECU.
Brake switch circuit is functioning.
I checked the ECU for +12v and proper ground -> with this I expect to get the bulb to turn on at a minimum.

PIN 2 removed to test if NSS is contributing to not turning on. No change.
IMG_1755.jpeg


PIN 7 grounded to confirm Cruise light turns on.
IMG_1754.jpeg


Photos of C20 connector that plugs into cruise ECU.
IMG_1757.jpeg

IMG_1756.jpeg
 
From your pics, I can see you have nothing connected to pin 4. That pin is what is directly wired to the on/off switch on the cruise control stalk, and pressing that button (momentarioy grounding pin 4) is what turns on the cruise light. Double check your stalk wiring with the diagrams, you've got something wrong.
 
I was about to update this thread with exactly that!
While setting up an electrical testing station, I noticed that in one of the extra pigtails that Pin 4 and 5 were different from the connector in my truck. I decided to follow an earlier wiring supplement that matched PIN 4+5 of the pigtail on my bench. Voila! The light turned on as expected.
I have been looking at the August 1996 supplement as it matched my harness exactly. However, I think the ECU I have follows prior years. There will likely need to be some more pins moved around.
If I could track down the correct ECU for my truck then I wont need to make any changes. Since the changes are so easy to do I will go that route.
 
You must log in or register to reply here.

Similar threads

D
1997 FZJ80 Cruise Control - Getting Started
Replies
3
Views
707
ofer bruhis
ofer bruhis
Gerrha
Cruise Control Actuator Disassembly
Replies
2
Views
937
Gerrha
Gerrha
R
80hdj cruise control inputs
Replies
0
Views
517
random101
R
R
Cruise control is dead
Replies
2
Views
1K
random101
R

Users who are viewing this thread

Total: 2 (members: 0, guests: 2)

Share this page

Back
Top Bottom