Sometimes they are stuck to the back side of the deck lid.
In the fuel tank
Pipe coming out of the fuel tank
The easiest way to disarm your antitheft system on your 1988 Nissan Maxima is to remove the fuse. The antitheft system fuse location can be found on the inside cover of the fuse box.
spark plug setting should be .044
See this post: http://wiki.answers.com/Q/How_do_you_trun_off_the_alarm_on_a_1988_Nissan_maxima
Passanger side of engine, near the A/C compressor. Access from under the car.
1985 - 1988 Nissan Maxima is the only other Nissan model with power window motors that will fit a 1986 300ZX.
After reading the code, fixing the cause, you clear the code with a scan tool.
Could need a tune up or could be something in the fuel injection such as a bad injector.