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Home >> Nissan-Datsun >> 1991 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Self-Diagnostic System >> Single Led - 2 Modes >> Notes

Single Led - 2 Modes: Notes

Self-diagnostic system will be operated in one of 2 modes. Modes are manually changed using screwdriver through access port on ECU. To change mode, turn ignition switch on but DO NOT start engine. Turn screwdriver fully clockwise. Wait at least 2 seconds then turn screwdriver fully counter-clockwise. Inspection light will begin to flash.

NOTE: It is not possible to switch mode when the engine is running. ECU will switch back to MODE I when ignition switch is turned off.