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OBD DRIVE MODE [WITHOUT WU-TWC]

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• Performing the Drive Mode and inspect the OBD system for proper operation. The Drive Mode must be performed to ensure that no additional DTCs are present.
• During Drive Mode, the following systems are inspected:

  - Oxygen sensor (HO2S)
  - Oxygen sensor heater

  Caution

  • While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.
  • When the WDS or equivalent is used to observe monitor system condition 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 system inspection is not completed during the Drive Mode, the following causes are considered:

  1. The OBD system detects the malfunction.
  2. The Drive Mode procedure has 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 condition. Monitoring can be done by viewing the ON-BOARD SYSTEM READINESS menu.

## PCM Adaptive Memory Procedure Drive Mode

  Note

  • The PCM adaptive memory condition can be confirmed with the RFCFLAG PID.
  • If the RFCFLAG PID has been learned, the PCM Adaptive Memory Procedure Drive Mode is not necessary, because the PCM already has adaptive memory.
  • If the RFCFLAG PID has not been learned, the PCM Adaptive Memory Procedure Drive should be performed.

1. Start the engine and warm it up completely.

2. Verify the all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.

3. Perform no-load racing at the engine speed shown in the graph, then idle the engine for more than 30 s after the cooling fan is stopped. If possible, monitor the RPM PID for engine speed and the FAN1 PID for the cooling fan condition during this procedure.

4. Turn the ignition switch off then on again.

5. Access RFCFLAG PID to confirm the PCM adaptive memory condition. If the RFCFLAG PID has been learned, the PCM Adaptive Memory Procedure Drive is completed.

6. If the RFCFLAG PID has still not been learned, go back to Step 1.