Nissan/Infiniti Pattern 2 - Late EVAP System

Topics in this section include:

1. Drive Cycle Pattern
2. Drive Cycle Procedures
3. Drive Cycle without EVAP Video
4. Drive Cycle EVAP Video

1. This pattern was used for most NISSAN/INFINITI between 2004 & later vehicles.  During these years, the EVAP system will test under a vacuum in Steps 4 & 5. If the Fuel Tank Temperature Sensor indicates the fuel tank temperature has not increased enough, step 6 will have to be performed.

2. The steps listed pertain to the pattern shown above. NOTE: Depending on the startup engine temperature, vehicle speed, and engine load, these steps can run out of order.

3. This video was captured while performing the drive cycle on a dynamometer.  The factory scan tool at that time displayed the inner workings of the Engine Control Module (ECM). NISSAN Pattern 2 was used for most NISSAN/INFINITI vehicles after 1998.  The main difference after 2003 was with the EVAP system.  The video does not show Steps 5 & 6 in Pattern 2.  Those steps will be shown in the following video.

4. This video shows NISSAN Pattern Steps 4 - 5.  Step 6 is only required if the Fuel Temp Sensor does not rise a minimum of 4⁰ F (2⁰ C).  Performing step 6 multiple times will slosh the fuel in the tank, resulting in a temperature and pressure increase. Focus your attention on the Purge VOL and Vent solenoids.  This system leaks, so the PCM first tests the system using vacuum decay and then proceeds to test the system under pressure.