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Diagnostic Modes

The self-diagnostic system can detect ECCS malfunctions and store related trouble code. Trouble codes, including intermittent codes, are stored in ECU memory and are available for interpretation unless codes have been cleared.

A single Light Emitting Diodes (LED) self-diagnostic system, located on ECU, is used. For system application, see SELF-DIAGNOSTIC SYSTEM  table. The ECU is located in the center of the dash, behind the console.

SELF-DIAGNOSTIC SYSTEM

Application CHECK ENGINE Light LED Colors (No.)
300ZX Calif. & Fed. Red (1)