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Home >> Nissan-Datsun >> 1989 >> Sentra Base >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes >> Self-Diagnostic System >> Entering Self-Diagnostics
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Entering Self-Diagnostics

  1. Turn ignition switch to "ON" position. Use a screwdriver to turn ECU diagnostic mode selector fully clockwise.
  2. Wait for inspection lights to begin flashing. At this time, inspection lights will flash the mode options (i.e. 2 flashes for Mode 2, etc.). As soon as inspection light flashes the desired mode number (3 flashes for Mode 3), immediately turn mode selector off.
  3. If the mode selector is kept in the "ON" position, the mode selections will continuously cycle (Mode 1 to Mode 2 up to Mode 5, then cycles to Mode 1, etc.) and the process will continue. This will not erase the memory.
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