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.

Mode 1 (PCM Adaptive Memory Produce Drive Mode)
1. Start the engine and warm it 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 the specification.
- TEN and GND of DLC are not connected.




3. Perform no load racing at the engine speed shown in the graph, then idle the engine for more than 20 s after the cooling fan stopped. If possible, monitor RPM PID for engine speed and FAN2 PID (with A/C), FAN1 PID (without A/C) for cooling fan status during this procedure.

Mode 2 (EGR System Repair Verification Drive Mode)
1. Perform Mode 1 first.
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 ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to inspect the Drive Mode completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then repeat from Step 3.

5. Access DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to inspect the monitor results.
- If MEAS are not within specification, repair has not completed.

6. Verify no DTCs are available.

Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
1. Perform Mode 1 first.
2. Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.




3. Drive the vehicle as shown in the graph. Driving condition before the constant speed driving is not specified.
4. Stop the vehicle and access ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to inspect the completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then repeat from Step 3.

5. Access DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to inspect the monitor results.
- If MEAS are not within the specification, repair has not been completed.

6. Verify no DTCs are available.

Mode 4 (EVAP System Repair Verification Drive Mode)

NOTE:
- If Mode 4 cannot be performed (it is impossible to drive the vehicle under Mode 4 condition), perform evaporative system test procedure as an alternative. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION.)
- Mode 4 can be performed regardless of RFCFLAG status.

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.