Monitors, Trips, Drive Cycles and Readiness Codes
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 detected a malfunction.
- The Drive Mode procedure was 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.
Mode 1 (PCM Adaptive Memory Produce Drive Mode)
NOTE:
- The PCM adaptive memory status can be confirmed with RFCFLAG PID.
- If RFCFLAG PID is Learnt, Mode 1 is not necessary, because PCM already has adaptive memory.
- If RFCFLAG PID is Not Learnt, Mode 1 should be performed before Mode 2 or 3.
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 of 2,500 - 3,500 rpm for 15 s or more, then idle the engine for 60 s or more after the cooling fan stopped.
4. Turn the ignition key off then on again.
5. Access to RFCFLAG PID to confirm PCM adaptive memory status.
- If RFCFLAG PID is Learnt, Mode 1 is completed.
- If RFCFLAG PID is still Not Learnt, go back to Step 1.
Mode 2 (EGR System Repair Verification Drive Mode)
1. Access the RFCFLAG PID to confirm PCM adaptive memory status. If RFCFLAG PID is Not Learnt, perform Mode 1 first.
2. If RFCFLAG PID is Learnt, start the engine and warm-up completely.
3. Verify that all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
4. Drive the vehicle as shown in the graph.
5. Stop the vehicle and access the ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFCFLAG PID changes from Not Learnt to Learnt.
- If not completed, turn the ignition key off then go back to Step 4.
6. Access the DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not been completed.
7. Verify that no DTCs are available.
Mode 3 (HO2S heater, HO2S. and TWC Repair Verification Drive Mode)
1. Access the RFCFLAG PID to confirm PCM adaptive memory status, if RFCFLAG PID is Not Learnt, perform Mode 1 first.
2. If RFCFLAG PID is Not Learnt, start the engine and warm up completely.
3. Verify that all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
4. Drive the vehicle as shown in the graph. The driving condition before driving at constant speed is not specified.
5. Stop the vehicle and access the ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFCFLAG PID changes from Not Learnt to Learnt.
- If not completed, turn the ignition key off then go back to Step 4.
6. Access the DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not been completed.
7. Verify that no DTCs are available.
Mode 6 (EVAP System Repair Verification Drive Mode)
NOTE:
- If Mode 6 cannot be performed (you cannot drive the vehicle under Mode 6 condition), perform evaporative system test procedure as an alternative. (See Evaporative System Test.)
- Mode 6 can be performed regardless of RFCFLAG condition.
1. Verify that all of the following items are within the stated specifications. All items must be within specifications before the 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}
- Fuel tank level: 15 - 85 %
- Battery positive voltage: 10.9 - 14.6 V
2. Clear DTCs from PCM memory using the WDS or equivalent.
3. Start the engine and idle it for 10 s or more, then turn ignition key to OFF.
4. Leave the vehicle is this condition for 5 hours or more.
5. Start the engine and idle it for 15 min or more.
6. Drive the vehicle at the engine speed of 65 - 80 km/h {40 - 50 mph} for 5 min or more.
7. Stop the vehicle and turn ignition key to OFF.
8. Leave vehicle in this condition for 10 min or more.
9. Start the engine.
10. Access the ON BOARD SYSTEM READINESS to inspect the Drive Mode completion status.
- If completed, RFCFLAG PID changes from Not Learnt to Learnt.
- If not completed, turn the ignition key off then go back to Step 1.
11. Access the DIAGNOSTIC MONITORING TEST RESULTS to inspect the monitor results.
- If MEAS are not within specification, repair has not been completed.
12. Verify that no DTCs are available.