Retrieving Codes
WARNING: This page is about a different car, the 1989 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Mode 3 is used to retrieve trouble code(s) from the ECU self-diagnostic system.
Trouble codes are read using the Red and Green LED inspection lights on the side of the ECU. After selecting mode 3, trouble codes corresponding to that mode will start flashing. Trouble codes are indicated by the number of flashes from the ECU Red and Green LED inspection lights. Count the number of flashes. The Red LED indicates the number of tens while the Green LED indicates the number of ones. For example, 3 flashes of the Red LED followed by 2 flashes of the Green LED would indicate code 32.