Transmission issues after 1nzfet swap - Toyota Yaris Forums

Huevito · 12-27-2022, 11:22 AM

Hello I recently completed my first project engine swap and have my second gen sedan rolling but my issue now is my transmission, code p0500 I swapped out the sensor(s) and no luck. So the story to it is I kept the JDM transmission that came with the motor since almost all of the connections and sensors matched the US transmission, the only problem was the JDM transmission had a port cover where the speed sensor is located I removed it and installed the transmission speed sensor from the US transmission and now my car will not shift past 3rd gear. I was eventually going to swap to a manual transmission but for transportation reasons I needed to drive is sooner than expected. Anyway any help would be greatly appreciated thank you! Oh it’s an automatic transmission just in case you didn’t catch that. 😎🤙

Compeer · 01-17-2023, 03:17 AM

Quote:

Originally Posted by Huevito

Hello I recently completed my first project engine swap and have my second gen sedan rolling but my issue now is my transmission, code p0500 I swapped out the sensor(s) and no luck. So the story to it is I kept the JDM transmission that came with the motor since almost all of the connections and sensors matched the US transmission, the only problem was the JDM transmission had a port cover where the speed sensor is located I removed it and installed the transmission speed sensor from the US transmission and now my car will not shift past 3rd gear. I was eventually going to swap to a manual transmission but for transportation reasons I needed to drive is sooner than expected. Anyway any help would be greatly appreciated thank you! Oh it’s an automatic transmission just in case you didn’t catch that. 😎🤙

Try using the jdm speed sensor, Are the wire colours the same? Changing a plug is no big deal, these day you can get solder conections you heat with a lighter to belt, some of those and you can quickly change the plaug over. May have to research and make sure wires are the same, but it should be.

woolongdev · 03-04-2024, 12:02 AM

found some interesting info on using the jdm u340e in usdm cars.
The wiring for the solenoids is a little different.
https://www.drive2.ru/l/561243512448747398/

Accord to this, the easiest option would be to add a wire into the vehicle side of the harness (pin#7)and run it to ground.
This will allow the lockup solenoid to operate.

12-27-2022, 11:22 AM	#1
Huevito Drives: 2007 Yaris Sedan Join Date: Aug 2022 Location: Eastvale, Ca Posts: 4	Transmission issues after 1nzfet swap Hello I recently completed my first project engine swap and have my second gen sedan rolling but my issue now is my transmission, code p0500 I swapped out the sensor(s) and no luck. So the story to it is I kept the JDM transmission that came with the motor since almost all of the connections and sensors matched the US transmission, the only problem was the JDM transmission had a port cover where the speed sensor is located I removed it and installed the transmission speed sensor from the US transmission and now my car will not shift past 3rd gear. I was eventually going to swap to a manual transmission but for transportation reasons I needed to drive is sooner than expected. Anyway any help would be greatly appreciated thank you! Oh it’s an automatic transmission just in case you didn’t catch that. 😎🤙

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03-04-2024, 12:02 AM	#3
woolongdev I've made a post! Drives: scion xb Join Date: Dec 2022 Location: ny Posts: 1	found some interesting info on using the jdm u340e in usdm cars. The wiring for the solenoids is a little different. https://www.drive2.ru/l/561243512448747398/ Accord to this, the easiest option would be to add a wire into the vehicle side of the harness (pin#7)and run it to ground. This will allow the lockup solenoid to operate.