ECU reset

neejv. · 07-23-2016, 12:40 AM

Quote:

Originally Posted by cdoxp800

ECU Resetting Procedures

Timing is extremely critical. If it is NOT DONE within the specify time, the ECU will not reset and the Check Engine Light (CEL) will continue to remain ON.
A stop watch or an analog clock with a second’s needle will be useful.

Operations Procedures

1. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2. Repeat the following steps (2a and 2b) procedures quickly five times within 5 seconds.
2a. Fully depress the accelerator pedal (HARD).
2b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the CEL starts blinking.
4. Fully release the accelerator pedal (while the CEL is still blinking)
5. Wait about 10 second.
6. Fully depress the accelerator pedal and keep it for more than 10 seconds.
7. Fully release the accelerator pedal (The CEL light will continue to blink).
8. Turn ignition switch to “OFF” position and now you can start the car. The CEL light should be gone.

If the CEL light continues to remain ON, repeat the above steps. Timing is EXTREMELY critical to resetting the ECU.

just wondering, will this procedure clear/reset the way your car learn how you drive?

SouthArk370Z · 07-23-2016, 08:17 AM

Quote:

Originally Posted by neejv.

just wondering, will this procedure clear/reset the way your car learn how you drive?

I'm pretty sure (but not positive) that it does but it only takes a little while for it to relearn. The ECM is constantly adjusting the how-I've-been-driving params, so you won't really lose anything.

Be aware the the ECM will also forget engine tuning params. The engine will run a little rough until it relearns. This doesn't take very long.

Details of what happens during the reset procedure should be in the FSM (link in my sig).

PS: The emissions system readiness will probably be reset also (see FSM to verify). This takes several drive cycles to show ready. Shouldn't be a problem unless you have a smog check done very soon after the reset.

PPS: The FSM is your friend. Download a copy and keep it handy.

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