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Home >> Infiniti >> 1999 >> G20 Base, Automatic, RE4F03V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Introduction >> Self-Diagnostic System >> Retrieving Codes Using Mil >> Diagnostic Test Mode I
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Diagnostic Test Mode I

NOTE: Test modes cannot be switched with engine running. When ignition is turned off, power to PCM will turn off after 5 seconds. PCM will then return to diagnostic test mode I. Ensure test mode selector is in fully counterclockwise position when vehicle is in use.

As a bulb check, light glows when ignition is turned on and engine is not running. When vehicle is started, MIL will turn off, indicating that no malfunctions are detected. If a malfunction is detected while the engine is running, the MIL glows or flashes and a corresponding DTC will be set in PCM memory.

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