Drive Cycle Mode 2
CAUTION:
Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the following drive cycle.
NOTE:
For aid in Mode 2 description, refer to illustration. See Fig 1.
NOTE:
For the Mode 2 driving procedure, it is best to use a stopwatch for accurate timing of the drive cycle.
NOTE:
Observing the diagnostic monitors while performing this mode will verify when the mode is complete, as the monitors will clear. If Mode 2 is performed properly and the monitors do not clear, either Mode 1 was not successfully completed or a concern exists with the vehicle.
- Ensure Mode 1 has been successfully completed.
- Turn ignition off. Connect scan tester to OBD-II DLC.
- Enter PID/DATA MONITOR menu selection. Access VSS PID.
- Ensure all accessories are off including A/C.
- Start the engine and stopwatch.
- Idle the engine for one minute, or drive the vehicle at any legal speed for approximately one minute (no particular driving pattern is necessary).
- With transmission in DRIVE (A/T) or 5th gear (M/T), accelerate the vehicle to approximately 53-63 MPH (90-116 kph) and maintain that speed for one minute.
- After the stopwatch has passed the one minute mark, slow the vehicle to stop and let the vehicle idle in PARK (A/T) or NEUTRAL (M/T) for more than one minute. At this point the oxygen sensor heater system monitor and the exhaust gas recirculation (EGR) system monitor should be cleared.
- Turn ignition switch to OFF position and proceed to Mode 3, if necessary.