Description of Drive Cycles

The primary intention of the On Board Diagnostics II (OBD II) Drive Cycle is to clear the DTC P1000. The OBD II Drive Cycle assists in identifying an OBD II system concern through total monitor testing.

If the driver is working alone, it is recommended that the scan tool be used after a drive cycle is completed to observe the status of all OBD II monitors. However, a scan tool can be installed in the vehicle before a drive cycle to observe Diagnostic Trouble Code (DTC) output. Also, the scan tool can be used anytime through the course of a drive cycle to observe monitor completion status by viewing the On-board Readiness Menu and PID Monitor Data Record Function.

CAUTION: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the following drive cycles.

Rough road surfaces may prevent some monitors from completing and extreme ambient temperatures may prevent the HO2S, Catalyst (Federal Test Procedure) and Evaporative Emission monitors from initiating.

In the event that a particular drive mode of the OBD II Drive Cycle is interrupted before completion, repeat this drive mode. Once started, the engine must not be turned off at any time during the OBD II Drive Cycle.

NOTE: Vehicles equipped with Power Take-off (PTO) must have that system disengaged before the OBD II Drive Cycle is initiated.