OBD-II Drive Mode

OBD-II DRIVE MODE

- Performing the Drive Mode inspects the 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 inspected:
- EGR system
- Oxygen sensor (HO2S)
- Oxygen sensor heater
- Catalytic converter (TWC)
- Fuel, misfire and evaporative (EVAP) 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 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.

PCM Adaptive Memory Produce Drive Mode

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

1. Start the engine and warm up completely.
2. Verify the following conditions and correct if necessary:
- All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
- Initial ignition timing and idle speed are within specification.

3. Perform no load racing at the engine speed at the 2,500 - 3,500 rpm for more than 15 seconds.
4. Continuously perform no load racing at the engine speed at the 4,500 - 5,000 rpm for more than 15 seconds.
5. Idle the engine for more than 60 s after the cooling fan stopped.
6. Turn the ignition key off then on again.
7. Access to RFCFLAG PID to confirm PCM adaptive memory status.
- If RFCFLAG PID is "Learnt", "PCM Adaptive Memory Produce Drive Mode" is completed.
- If RFCFLAG PID is still "Not Learnt", go back to Step 1.

EGR System Repair Verification Drive Mode

1. Access to RFCFLAG PID to confirm PCM adaptive memory status. If RFCFLAG PID is "Not Learnt", perform "PCM Adaptive Memory Produce Drive Mode" first.
- If RFCFLAG PID is ON, start the engine and warm up completely.

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




3. Drive the vehicle as shown in the graph.
4. Stop the vehicle and access to ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then go back to Step 3.

5. Access to DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not completed.

6. Verify no DTCs are available.

HO2S Heater, HO2S, and TWC Repair Verification Drive Mode

1. Access to RFCFLAG PID to confirm PCM adaptive memory status. If RFCFLAG PID is "Not Learnt", perform "PCM Adaptive Memory Produce Drive Mode" first.
- If RFCFLAG PID is ON, start the engine and warm up completely.

2. Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
3. Start the engine and let idle it for more than 5 min.
4. Drive the vehicle as one of the following condition.
- Vehicle speed is more than 89 km/h {55 mph} for 1 min (MTX: 5th gear ATX: D range)
- Vehicle speed is more than 80 km/h {50 mph} for 1 min (MTX: 4th gear ATX: D range)

5. Continuously drive the vehicle as the following condition.
- Vehicle speed is between 72 - 88 km/h {45 - 55 mph} for 3 min (MTX: 5th gear ATX: D range)

6. Stop the vehicle and access to ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then go back to Step 3.

7. Access to DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not completed.

8. Verify no DTCs are available.

EVAP System Repair Verification Drive Mode

NOTE:
- If "EVAP System Repair Verification Drive Mode" can not be performed (you can not drive the vehicle under "EVAP System Repair Verification Drive Mode" condition), perform evaporative system test procedure as an alternative. (See Evaporative System Test.)
- "EVAP System Repair Verification Drive Mode" can be performed regardless RFCFLAG condition.

1. Verify all following PIDs are within the following specifications. All PIDs must be within specifications before engine is started to initiate the evaporative system test.

- BARO: 72.3 kPa {542 mmHg, 21.3 inHg} or higher
- IAT: 5 - 35°C {41 - 95°F}
- FTL: 15 - 85 %
- B+: 10.9 - 14.6 V

2. Clear DTC from PCM memory using WDS or equivalent.
3. Start the engine and idle it for more than 10 s, then turn ignition key to OFF.
4. Leave vehicle for 5 hours or more.
5. Start the engine and idle for more than 15 min.
6. Drive the vehicle at the engine speed at 65 - 80 km/h {40 - 50 mph} for more than 5 min.
7. Stop the vehicle and turn ignition key to OFF.
8. Leave vehicle as it is for 10 min or more.
9. Start the engine.
10. Access to ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then go back to Step 1.

11. Access to DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not completed.

12. Verify no DTCs are available.