How To Switch Diagnostic Test Mode: Notes

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

It is better to count the time accurately with a clock.
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction.
Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.