Scanner and gave the code U0101?

ROKR_MAZDA

MEMBER
2009 MAZDA 3
2.3L
4 CYL
2WD
AUTOMATIC
150,000 MILES

My problem started with the start of the check engine and the AT, it was checked with a scanner and gave the code u0101, when reviewing the TCM module they indicated that it received a short circuit.

I would like to know if someone has the diagrams for the identification of the short circuit.

thanks

3 Replies

JOETECHPRO

MECHANIC
705 POSTS

Hey ROKR_MAZDA,

I have attached the wiring diagram for the A/T controls.

I have also attached the testing information for the terminals at the TCM plug connector.

Let us know if you need any further information or have any questions about the testing results you get.

Regards, Joe

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Tuesday, February 11th, 2020 AT 3:52 PM

HUDUMASAUD

MEMBER
45 POSTS

Can you also please also indicate the wire to test that is related to the throttle body from the TCM, I have similar issue because even my PRND indicator is not lighting up. It just shows AT and the throttle body misbehaves. Thank you

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Tuesday, October 22nd, 2024 AT 4:34 PM

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

The throttle body connected to the PCM only. Here is the wiring diagrams and a guide to help you test the wiring.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know what happens.

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