JDM FZJ80 Computer Problems (1 Viewer)

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Mar 11, 2018
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I've got a 92 JDM FZJ80 with a computer throwing 83 84 85. Also have low idle and some other transmission issues. Brought it to the transmission shop today and they didn't really see anything wrong with it. I've scoured this website for information about JDM ECU's and there is little to no discussion that I've seen. Common knowledge for the 93 bad ECU is to replace with the 221 model, but I've been advised that American ECU's will not work. Currently, I'm debating on whether to:

1. Buy a replacement, same model ECU: 89661-60160. This is a gamble as it might just have the same issue.
2. Buy a replacement, but newer ECU: 89661-60290. This seems like a good option, BUT it was made for 95-98 JDM cruisers. I have no idea if this will be compatible.
3. Just keep resetting the ECU and live with the s***ty idle.

Anyone have any ideas? Do you think the 60290 will be compatible?

Parts link:

 
Joined
Feb 2, 2004
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10,893
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Washington
 
 
 
Is it truly a 1992, FZJ80? It has a 1FZFE Engine in 1992? If cruisers came this way in Japan I was not aware. If it is not an FZJ80 and is an FJ80 that could change things. Please take some pictures underhood and of the ECU and lets see what you have.

I've got a 92 JDM FZJ80 with a computer throwing 83 84 85. Also have low idle and some other transmission issues. Brought it to the transmission shop today and they didn't really see anything wrong with it. I've scoured this website for information about JDM ECU's and there is little to no discussion that I've seen. Common knowledge for the 93 bad ECU is to replace with the 221 model, but I've been advised that American ECU's will not work. Currently, I'm debating on whether to:

1. Buy a replacement, same model ECU: 89661-60160. This is a gamble as it might just have the same issue.
2. Buy a replacement, but newer ECU: 89661-60290. This seems like a good option, BUT it was made for 95-98 JDM cruisers. I have no idea if this will be compatible.
3. Just keep resetting the ECU and live with the s***ty idle.

Anyone have any ideas? Do you think the 60290 will be compatible?

Parts link:

 
Joined
Mar 11, 2018
Messages
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Location
Seattle
Yeah it's truly a 1992 FZJ80. I have the 1FZ engine. Maybe it's a preproduction 93? But the VIN has 92 right on it. Cruiser is in the shop for possible transmission issues, but they aren't wanting to replace the solenoids due to the 83 84 85.
 
Joined
Sep 19, 2011
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Open the ecu and see if you see any damage like leaking capacitors. Very common for Toyotas of that era
Agree, I've had several 1KZTE ECUs repaired. The caps on them go bad and leak, usually it makes the trans shift very weirdly, like hunting for gears.

Its a very simple repair for skilled electronics techs.
 
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Agree, I've had several 1KZTE ECUs repaired. The caps on them go bad and leak, usually it makes the trans shift very weirdly, like hunting for gears.

Its a very simple repair for skilled electronics techs.
I had a 1jzgte swap in my old supra and I had to solder caps all the time. I was not smart enough to do them all at once.
 
Joined
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I had a 1jzgte swap in my old supra and I had to solder caps all the time. I was not smart enough to do them all at once.
Luckily for me there's a company here in NZ that does a heap of recaps on 90s Toyota ECUs - they do an overnight mail order service - they even have a test rig set up so they can at least verify they power up after repair etc.
 
Joined
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Aight, for the random person who finds this on google experiencing the same problem. I managed to fix this issue by buying a new computer off of ebay. I bought the same model number 89661-60160. If the computer dies again I'll update this thread.

I also replaced the Throttle Position Sensor, but I doubt that was actually faulty.
 
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Maine
Aight, for the random person who finds this on google experiencing the same problem. I managed to fix this issue by buying a new computer off of ebay. I bought the same model number 89661-60160. If the computer dies again I'll update this thread.

I also replaced the Throttle Position Sensor, but I doubt that was actually faulty.

Ah but now you dont really know, you did the ol' replace two things at once deal so its a mystery forever.:hmm:
 
Joined
Dec 10, 2007
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Did you open the ECM to check the capacitors, got a photo of the circuit board?
 
Joined
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The shop I sent it to opened it up and didn't see anything obvious. I still have the CPU so I guess I can check myself.
 

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