Driving Pattern

Fig 1: Identifying Recorded Driving Patterns

Courtesy of NISSAN MOTOR CO., U.S.A.

The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driving habits, etc.
Zone A refers to the range where the time, required for the diagnosis under NORMAL CONDITIONS is the shortest.

Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within zone A.

Normal conditions refer to the following:
- Sea level
- Flat road
- Ambient air temperature: 20 - 30° C (68 - 86° F)
- Diagnosis is performed as quickly as possible under normal conditions.
  Under different conditions [For example: ambient air temperature other than 20 - 30° C (68 - 86° F)], diagnosis may also be performed.

Pattern 1, see Fig 1 :
- The engine is started at the engine COOLANT temperature of -10 to 35° C (14 to 95° F) (where the voltage between the ECM terminal 73 and ground is 3.0 -4.3V) .
- The engine must be operated at idle speed until the engine COOLANT temperature is greater than 70° C (158° F) (where the voltage between the ECM terminal 73 and ground is lower than 1.4V) .
- The engine is started at the fuel tank temperature of warmer than 0° C (32° F) (where the voltage between the ECM terminal 107 and ground is less than 4.1V) .
Pattern 2, see Fig 1 :
- When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted. In this case, the time required for diagnosis may be extended.
Pattern 3, see Fig 1 :
- The driving pattern outlined in 2 must be repeated at least 3 times.
Pattern 4, see Fig 1 :
- Tests are performed after the engine has been operated for at least 17 minutes.
- The accelerator pedal must be held very steady during steady-state driving.
- If the accelerator pedal is moved, the test must be conducted all over again.
  1. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH) again.
  2. Operate the vehicle in the required driving pattern. See Fig 2 .
    1. Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.
    2. Repeat driving pattern shown in Fig 2 at least 10 times.
  3. Checking the vehicle speed with GST is advised.