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Home >> Infiniti >> 1999 >> QX4 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Introduction >> Self-Diagnostic System >> Retrieving Codes Using Mil >> Erasing Stored Information
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Erasing Stored Information

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.

The following emission related information will be erased from PCM memory: DTCs stored, 1st trip DTCs, freeze frame data, 1st trip freeze frame data, System Readiness Test (SRT) codes and test values. To erase this information, switch from Diagnostic Test Mode II to Diagnostic Test Mode I. While PCM is in Diagnostic Test Mode II, turn mode selector on PCM fully clockwise, wait 2 seconds and turn mode selector fully counterclockwise.

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