Hey fellas,
I've been on the forum for a while but haven't really posted that much. I just recently completed my swap, putting a 1UZ from a 97' SC400 into my '98 4Runner. I had Doc over at Phoenix Tuning do the harness conversion for me.
Well, the big problem I'm facing right now is not being able to connect to the ECU. I was on the phone for a few hours yesterday with Doc; we tried testing different wires, connections, etc with no luck.
When you plug in an OBDII reader into the data port under the dash, it gets +12V power. The problem is when you try to link to the ECU; an error comes back saying "unable to establish link" or "link error", etc. depending on which reader you use (I've tried several).
The data port has four wires; the "data" wire, +12V power, and two grounds. I've checked the continuity of the data wire from the port to the 40-pin ECU connector and it's good. I also made sure the wire wasn't grounding out somewhere along the way. So as far as I can tell, the data is able to "physically" pass from the port to the ECU and vice versa. I also checked the OBD fuse and tested the two ground wires and they're good.
So at this point I'm out of ideas. Doc thinks it might be a loose ground somewhere or an outside chance that it may be the ECU itself. I looked everywhere and all the grounds are clean and secure. Short of buying a new ECU, do you guys have any suggestions?
Oh yeah, the motor runs but it sounds like it's missing. I've checked some simple things like making sure the plugs were wired correctly, wires grounded, etc. But before I start tearing the motor back apart, I'd like to be able to connect to the ECU and have IT tell me what's wrong! Any ideas?
I've been on the forum for a while but haven't really posted that much. I just recently completed my swap, putting a 1UZ from a 97' SC400 into my '98 4Runner. I had Doc over at Phoenix Tuning do the harness conversion for me.
Well, the big problem I'm facing right now is not being able to connect to the ECU. I was on the phone for a few hours yesterday with Doc; we tried testing different wires, connections, etc with no luck.
When you plug in an OBDII reader into the data port under the dash, it gets +12V power. The problem is when you try to link to the ECU; an error comes back saying "unable to establish link" or "link error", etc. depending on which reader you use (I've tried several).
The data port has four wires; the "data" wire, +12V power, and two grounds. I've checked the continuity of the data wire from the port to the 40-pin ECU connector and it's good. I also made sure the wire wasn't grounding out somewhere along the way. So as far as I can tell, the data is able to "physically" pass from the port to the ECU and vice versa. I also checked the OBD fuse and tested the two ground wires and they're good.
So at this point I'm out of ideas. Doc thinks it might be a loose ground somewhere or an outside chance that it may be the ECU itself. I looked everywhere and all the grounds are clean and secure. Short of buying a new ECU, do you guys have any suggestions?
Oh yeah, the motor runs but it sounds like it's missing. I've checked some simple things like making sure the plugs were wired correctly, wires grounded, etc. But before I start tearing the motor back apart, I'd like to be able to connect to the ECU and have IT tell me what's wrong! Any ideas?