Nissan OBD check engine light fault codes

Have you ever had the red ‘check engine' light illuminate on your dash?  You wouldn't be the first one.  This is a little worrying when you're on the freeway and have no place to stop.  Volvo VIDA DiCE Then there is the stress of imagining what the mechanics bills would be like.

Here is a simple guide to finding out what's caused the ‘check engine' light to come on, so you know what's going on before you see your mechanic.  You may be able to identify and fix the problem yourself.
This is the procedure for checking the ‘check engine' light fault codes for Nissans 1990-2000 that have the Nissan OBD (consult) system installed.  For a complete list of compatible cables go to Auto Locksmith Tool.
Step 1:
Locate the ECU. In most models it's underneath the kickboard in front of the front passenger seat.  There is a knob or switch on the side marked diagnostics that has an LED next to it.
Turn this knob clockwise (or to the ‘on' position).
Step 2:
Note the amount of flashes shown by the LED.  This is the ‘check engine' light fault code.  There may be several codes, but they are easily interpreted.  There will be a sequence of flashes, the long flashes (0.6sec each) represent the 10's column, and the short flashes (0.3sec each) represent the 1's.  For example if you got 2 long flashes followed by one short flash then you would have a code of 21 (ignition fault).  If you have more than one fault then the next fault code in sequence will show.