ECM Reset - Nissan Frontier Forum
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post #1 of 19 (permalink) Old 11-16-2011, 10:44 AM Thread Starter
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ECM Reset

Has anyone had any success in doing the ECM/PCM reset on the side of the box?
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post #2 of 19 (permalink) Old 11-16-2011, 08:27 PM
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I have a 1998 not sure what year frontier you have but this is how i check codes and reset them without scanner..I also did this on my 97 maxima..

The screw for the ECU is in the bottom of the center console and accessible from passengers side..

Follow the steps below.
Do not start the engine ever during the entire procedure.


Procedure Start:
1. Turn ignition key to the "ON" position but do not start the engine. (The ignition key will remain in this position throughout the entire procedure)
2. Turn the ECU switch fully clockwise, wait two seconds.
3. Turn the ECU switch fully counter clockwise.

Now you are in the trouble diagnostic mode with the check engine light blinking. To determine the MIL (Malfunction Indicator Lamp) code number see below.

Continue on to resetting ECU:

4. Turn the ECU switch fully clockwise again, wait two seconds.
5. Turn the ECU switch fully counter clockwise again.
6. Turn ignition key to the "OFF" position.
Procedure End:

Note: Never start the engine in the entire procedure.

You can note down the ECU codes by reading the Long & Short flashes in the Check Engine Light. To determine the MIL (Malfunction Indicator Lamp) code number use the following rules to decode the flashes:
1. Long flashes (0.6 second) are the first digit.
2. Pause (0.9 second).
3. Short flashes (0.3 second) are the last digit.
4. Pause (2.1 seconds).
Next code (if present)
The long flashes will occur before the short ones. If there are multiple error codes, then there will be a noticeable pause (2.1 sec) before the next code starts. The ECM code repeats itself until you turn the ignition key to the OFF position, at which point the ECM resets itself to standard get-in-and-drive-mode. Additionally, if you get four blinks of ten (0000), the ECM is indicating no malfunction.
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post #3 of 19 (permalink) Old 11-17-2011, 07:38 AM Thread Starter
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Thanks, that worked. I'm up and running now.
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post #4 of 19 (permalink) Old 11-18-2011, 09:03 AM
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Unplugging the battery for 24 hours does the same thing if you just need to reset it.
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post #5 of 19 (permalink) Old 11-18-2011, 01:32 PM
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Originally Posted by speedfoos View Post
unplugging the battery for 24 hours does the same thing if you just need to reset it.
actually a hard battery reset is much faster than that too. Disconnect 1 of the cables from the battery(or both if you want) i useally do the neg since theyre easier on most cars. Now touch it to the other cable for 5-10 seconds. This disharges the capacitors in the modules and return to factory default settings. No this wont erase engine codes on obdii vehicles. This is nothing more than restarting you pc when it locks up or unplugging the modem from the wall. As a tech on jaguars i dotn have the time to wait for caps to discharge when doing repairs like air bags etc... Also we fix a lot of problems like seat modules or any other module on a car this way. New jags have over 30 computer modules on them and yes just like our pc's or laptops they get stupid too. Lockup or do crazy things....ahhh arent computers great

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post #6 of 19 (permalink) Old 11-18-2011, 04:01 PM
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Gotcha. Didn't know how long the caps would last before full discharge and the ROM purged itself.
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post #7 of 19 (permalink) Old 11-21-2011, 07:15 AM
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thres one about turning ign to ON than pushing the accel peddal 5 times than key to off! cant remember it rite now but its fast and works every time!!

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post #8 of 19 (permalink) Old 11-21-2011, 12:28 PM
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I also have the pedal procedure but i believe it's for newer model nissans..I have done this on 2005 altima
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post #9 of 19 (permalink) Old 11-23-2011, 04:15 AM
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it works perfectly for my 02 frontier! 1. Turn Key to On Position 2. After 3 Seconds pump gas 5 times 3. After 10 seconds hold gas pedal to the floor for 12 seconds 4. Release pedal for 10 seconds 5. Hold Gas on the floor for 10 seconds 6. Turn truck off, wait 10 seconds and start

.....church, football, trucks, guns and beer... good way to spend a sunday.....

2002 Desert Runner
K&N drop in air filter
2 door toolbox
DIY/MODS
shocks and brakepad replacement
crank to electric windows
painting rims, running board and rear bumper
factory foglamp bypass stock switch
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post #10 of 19 (permalink) Old 11-23-2011, 08:45 AM
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good to know FRONTEXAS..I will try it on my 98...I know the turning the dial on ECU worked on Maxima up to 1999..I tryed dial on ECM on a 2000 maxima and the dial was not present...So maybe things changed after 2000 on computer reset..

I will try this weekend..this is great information..
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