OBD1 100 series ? (1 Viewer)

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Hello everyone,

We're facing a challenge with our recently acquired Land Cruiser from 2000, a 4.2 v6, 24v diesel that originally hails from Bulgaria. We had hoped to restore it using online resources, but it's proving more complex than anticipated. We're reaching out to this community for assistance.

The Toyota starts and runs, but the suspension warning light remains illuminated. We were unable to adjust the suspension, prompting us to replace the old, damaged shock absorbers with new, original ones. After attempting to refill the hydraulic system, the pump briefly activates, seemingly directing fluid towards a distributor, but it doesn't reach the shock absorbers. We believe that to properly fill the system, certain computer functions must be activated. However, we've hit a snag: we can't locate the OBD2 diagnostic connector. It's typically found near the internal fuse box or around the lower steering column area, but it's absent in our vehicle.

We then considered retrieving error codes from the "diagnostic" connector in the engine compartment. However, as the attached photos indicate, the Te1 pin lacks a plate, making error checking, as per many guides, unfeasible. After consulting an expert, we bridged pins E1 and TC, which caused the engine light to flash in a sequence: once, then thrice, and finally nine times. Regrettably, we haven't found any reference to this error sequence in available guides.

Despite our extensive efforts, including partially disassembling the car, the OBD2 connector remains elusive. We're left pondering: could this vehicle be a hybrid of sorts, with a mismatched body and internal components from different years?

We're eager to hear your insights and suggestions. How might we read the errors or possibly connect to the OBD2 ourselves? Any advice would be greatly appreciated, as we're truly stumped.

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In the US the OBD-II connector is above the accelerator pedal near the hump.

Not all 100s have OBD-II. It depends on the requirements of the market they were sold in. IIRC the AUS models were OBD-1 until the mid-2000s.

In the Resources section you can find a FSM to download, which may help with troubleshooting, but I'm pretty sure its a US market version.
 
Here's a few threads that might help. Seems like others have had the same problem.




 
This is the adapter cable that you need to connect to your under hood OBD port. It comes in two sizes, one is 22 pin connector and one is 17 pin connector.
It's available on Aliexpress.com

Screenshot 2023-08-10 at 20-39-26 6.48US $ 28% OFF Mini Vci For Toyota Tis Techstream V17.00.0...png
Screenshot 2023-08-10 at 20-35-20 6.48US $ 28% OFF Mini Vci For Toyota Tis Techstream V17.00.0...png
 
No adapter cables needed. The port in the engine bay is just for diagnostics by shorting pins and watching lights on the dash.
There is a OBDII port above the accelerator pedal, but on the diesel vehicles it is M-OBD, which is a Toyota thing.

Techstream reads it and there is no difference in that regard between diesel and petrol.
Generic ODB readers can somewhat read it, but you need an app that allows you to configure an initialisation string. With the string you can read a very limited amount of info - engine error codes, RPM, coolant temp, intake air temp aaaand that's about it. No transmission temperature, no brakes ABS errors, no AHC suspension errors, for all that you need Techstream.

Attempting to diagnose and fix AHC without Techstream is pointless.
 
LC100 LHD OBD2 Here's a Youtube short for Left hand Drives OBD2 Location

LC100 RHD OBD2 Here's a Youtube video for Right hand drives Location or at least an Australian one. This is how I found my OBD2 on my 2000 LX 470

If you cant find either then I'm stumped too.
But if you do then your can go ahead and get your laptop and buy a cheap little obd2 Techstream dongle like on ebay or amazon.
Follow a tutorial
Techstream tutoria I used Like this one.
And explore from there.
 
Thank you for your suggestions, but unfortunately, there is still no OBD2 connector in the locations provided. The only access we have is to the diagnostic connector under the hood, and even that is with incomplete pins, such as missing TE1. Can Techstream be connected to the connector I showed in the picture? There seem to be 11 active pins, so how can I find an adapter for that? Without having OBD2, is it possible to connect directly to the control computer on my own, or is that a more advanced task? How can I check if there is a cable bundle coming out of the main computer to the OBD2 connector? Perhaps there is another way to diagnose and repair the suspension.
 
why is your VIN plate saying "KZJ40L-KKPNTW"? doesn't make any sense at all:rofl:
it should say HDJ100L-GNPEZW according to your VIN.

wish you all the best with the project!

Cheers,
Nick
 
Yes, there is something fishy with the VIN plate.
Anyhow, to read Trouble Codes for the AHC, first check that the AHC-off light illuminates for 2 secs when turning the ignition on.
Then short Tc to ground (is E1 the same as CG?). Turn ignition on and read the flashes of the AHC-off light.

BTW, what was wrong with the shock absorbers?

Normally, what would be wrong with the AHC on a 2000 HDJ100 with lack of maintenance, would be:
1 - Too high pressure (worn out coils and maladjusted torsion bars)
2 - Height sensors failed (or wiring to)
3 - Wiring to valve body
4 - Flat globes (although the height adjustment would still work just fine)
5 - Gelled or faulty pump.
6 - A fuse (or 3)
 

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