Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2010 Toyota Matrix FWD L4-2.4L (2AZ-FE)FACTORY OEM SERVICE PROCEDURE
Programming and Relearning
U250E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION
1. RESET MEMORY
NOTICE:
* Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM.
* RESET MEMORY can be performed only with the Techstream.
HINT
The ECM learns various conditions and controls the automatic transaxle assembly and engine assembly according to those characteristics. Therefore, when the automatic transaxle assembly, engine assembly, or ECM has been replaced, it is necessary to reset the memory so that the ECM can re-learn.
Reset procedure is as follows.
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and Techstream on.
(d) Enter the following menu: Powertrain / Engine and ECT / Utility / Reset Memory. Then, press "Next".
CAUTION:
After performing RESET MEMORY, be sure to perform the ROAD TEST Road Test described earlier.
HINT
The ECM learns when the ROAD TEST is performed.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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