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OBD DRIVE MODE [WITH WU-TWC]

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• Perform 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
  - EGR system
  - Fuel system

  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 conditions 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:

  - The OBD system detected a malfunction.
  - The drive mode procedure has not been completed correctly.

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

## PCM Adaptive Memory Procedure drive mode

1. Start the engine and warm it up completely.

2. Verify the following conditions and correct if necessary:

  • All accessory loads are off.
  • Initial ignition timing and idle speed are within the specification.

3. Perform no-load racing according to the following conditions, then idle the engine for more than 30 s after the cooling fan has stopped.

Step | Time | Condition
--- | --- | ---
1 | T1: 15 s or more | N1: 2,300-2,700 rpm
2 | T2: 30 s or more | Idle

4. Turn the ignition switch off.

## EGR System, HO2S Heater Repair Verification drive mode

1. Perform the "PCM Adaptive Memory Produce drive mode" first.

2. Verify the following conditions and correct if necessary:

  • All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.

3. Perform no-load racing according to the following condition.

Step | Time | Condition
--- | --- | ---
1 | T1: 60 s | ZJ | V1: 70-80 km/h {44-49 mph} with 5th
ZY | Idle

4. Stop the vehicle and access the ON-BOARD SYSTEM READINESS TEST to inspect the drive mode completion status.

  • If completed, RFC changes from No to Yes.
  • If not completed, turn the ignition switch off, then go back to Step 3.

5. Verify that no DTCs are available.