Mode II (Self-Diagnostics)

When Mode II is accessed (engine not running), codes stored in ECU memory will be flashed by CHECK ENGINE light (if equipped) and red LED on side of ECU.

A long flash (.6 second) indicates first digit of code. Short flashes (.3 second) indicates second digit of code. For example: 1 long flash followed by 2 short flashes indicate a Code 12. See Fig 1 .

Fig 1: Trouble Code Display (Single LED System)

Courtesy of NISSAN MOTOR CO., U.S.A.