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Home >> Infiniti >> 1999 >> Q45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Introduction >> Self-Diagnostic System >> Retrieving Codes Using Mil >> Diagnostic Test Mode II
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Diagnostic Test Mode II

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.

Turn ignition on, but leave engine off. Using a small screwdriver, turn diagnostic mode selector on PCM fully clockwise and MIL should turn off. Wait at least 2 seconds, and then turn diagnostic mode selector fully counterclockwise which will enter into diagnostic test mode II. MIL will flash any DTC(s) present. If 2 or more DTCs are displayed, they may be DTC's or 1st trip DTCs. These can be identified by using CONSULT or GST. To erase stored diagnostic information, go to ERASING STORED INFORMATION .

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