I came on here and other boards looking for help after my nissan quest went dead (battery) and wouldn't start back up even though the battery was recharged. I suspected it had something to do with the alarm system. After reading lots of bad advice (it's the starter, it's the alternator, blah blah) I finally came upon this genius advice for how to reset an alarm manually. Hope this helps someone else like it helped me:
Working on the premise that different models from the same company have similar procedures, you could check out this model. Click [Manuals] at the top of the page and you will get a PDF which describes in detail how to manually overide the system.
MANUALLY OVERRIDING YOUR SYSTEM: USING THE CUSTOM CODE OVERRIDE Assuming the override code programmed has not been changed, and the default override code of 11 is in the system's memory. 1) Enter the vehicle and turn the ignition switch to the on position. 2) Within 5 seconds, press and release the push-button switch 1 time. 3) Within 5 seconds, turn the ignition switch off then on. 4) Within 5 seconds, press and release the push-button switch 1 time. 5) Turn the ignition switch off then on and start the vehicle. (If optional parking light relay was installed, the lights will flash twice, if the optional horn annunciation circuit was installed, the horn will beep twice) Note:If you have changed the programmed override code then substitute your new code tenths for step 2 above, and units for step 5 above. posted by Neiltupper at 2:43 PM on January 17