OBD-II Drive Modes: Notes

Performing Drive Mode inspects OBD-II system for proper operation and must be performed to ensure that no additional DTCs are present. During Drive Mode the following systems are monitored:

EGR system
Oxygen sensor and oxygen sensor heater
Three Way Catalytic (TWC) converter
Fuel, misfire and Evaporative Emission (EVAP) system

CAUTION: When the WDS or equivalent is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the WDS or equivalent using the PID/DATA MONITOR AND RECORD function and inspect later.

NOTE: Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer and tachometer. Use the WDS or equivalent to monitor vehicle speed. If the OBD II system inspection is not completed during the Drive Mode, the following causes are considered:

The OBD II system detects the malfunction.
The Drive Mode procedure is not completed correctly.

Disconnecting the battery will reset the memory. Do not disconnect the battery during and after Drive Mode. The WDS or equivalent can be used at anytime through the course of Drive Mode to monitor the completion status. Monitoring can be done by viewing the ON BOARD SYSTEM READINESS menu.

NOTE: The PCM adaptive memory status can be confirmed with RFCFLAG PID. If RFCFLAG PID is ON, Mode 1 - PCM Adaptive Memory Produce Drive Mode is not necessary, because PCM already has adaptive memory. If RFCFLAG PID is OFF, Mode 1 - PCM Adaptive Memory Produce Drive Mode should be performed before Mode 2 - EGR System Repair Verification Drive Mode or Mode 3 - HO2S Heater, HO2S & TWC Repair Verification Drive Mode.