Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 2008 >> 6 L4-2.3L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Monitors, Trips, Drive Cycles and Readiness Codes >> OBD-II Drive Mode

OBD-II Drive Mode

OBD-II DRIVE MODE [L3]
- Using the OBD-II drive mode, the monitoring item requested by OBD-II regulations can be easily diagnosed.
- Performing the Drive Mode inspects the OBD-II system for proper operation and must be performed to ensure that no additional DTCs are present.
- The OBD-II drive mode is divided into the specific drive mode and single drive mode.
- For the specific drive mode, specified drive modes have been set for each individual monitoring item requested by OBD-II regulations, and they can be diagnosed individually. For the single drive mode, the entire monitoring item requested by OBD-II regulations can be diagnosed.
- The following modes are in the specific drive mode. The applicable system is diagnosed by driving in the following drive modes.
- Mode 01 (PCM Adaptive Memory Produce Drive Mode)
- Mode 02 (EGR System Repair Verification Drive Mode)
- Mode 03 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
- Mode 06 (EVAP System Repair Verification Drive Mode)

- The following systems are diagnosed with the single drive mode.
- EGR system
- Oxygen sensor (HO2S)
- Oxygen sensor heater
- Catalytic converter (TWC)
- Evaporative (EVAP) system

CAUTION:
- While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.
- When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS 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 M-MDS 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 M-MDS 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.
- The OBD monitoring status can be confirmed with the ignition switch operation. During KOEO, the MIL illuminates for a fail-light inspection for approx. 17 s. The OBD monitoring status is confirmed after the fail-light inspection.
- If all of the diagnosis is completed even one time, the MIL will continue to illuminate.
- If all of the diagnosis is not completed, the MIL flashes for approx. 7 s, and then it illuminates until the engine is started.

Mode 01 (PCM Adaptive Memory Production 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.

3. Perform no load racing at the engine speed shown in the graph, then idle the engine for more than 60 s after the cooling fan has stopped. If possible, monitor RPM PID for engine speed during this procedure.




California emission regulation applicable ATX model




Except for California emission regulation applicable ATX model

Mode 02 (EGR System Repair Verification Drive Mode)
1. Perform "PCM Adaptive Memory Production Drive Mode" 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 verify the OBD monitoring status.
- If completed, the OBD monitoring status items change from non-completed to completed.
- If not completed, turn the ignition switch off then repeat from Step 3.

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

6. Verify no DTCs are available.

Mode 03 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
1. Perform "PCM Adaptive Memory Production Drive Mode" 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. The driving conditions before driving at constant speed are not specified.






4. Stop the vehicle and access ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to verify the OBD monitoring status.
- If completed, the OBD monitoring status items change from non-completed to completed.
- If not completed, turn the ignition switch off then repeat from Step 3.

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

6. Verify no DTCs are available.

Mode 06 (EVAP System Repair Verification Drive Mode)

NOTE: If "EVAP System Repair Verification Drive Mode" cannot be performed (it is impossible to drive the vehicle under this drive mode condition), perform EVAP system test procedure as an alternative. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3].) Component Tests and General Diagnostics

1. Verify that all of the following PIDs are within the following specifications. All PIDs must be within specifications before engine is started to initiate the EVAP system test.
- BARO: more than 72.2 kPa {542 mmHg, 21.3 inHg}
- IAT: 5-40 ° C {41-104 ° F}
- FTL: 15-85%
- B+: more than 10.9 V

2. Clear the DTC from the PCM memory using the M-MDS.
3. Start the engine and idle it for more than 10 s, then turn ignition switch 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 an engine speed of 65-80 km/h {40-50 mph} for more than 5 min.
7. Stop the vehicle and turn ignition switch off.
8. Leave vehicle as it is for 10 min or more.
9. Start the engine.
10. Access the ON BOARD SYSTEM READINESS to verify the OBD monitoring status.
- If completed, the OBD monitoring status items change from non-completed to completed.
- If not completed, turn the ignition switch off then go back to Step 1.

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

12. Verify no DTCs are available.

Single Drive Mode
1. Start the engine and warm it up completely.
2. Clear the DTC from the PCM memory using the M-MDS.
3. 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.

4. Verify that all of the following PIDs are within the following specifications. All PIDs must be within specifications from Step 5 to Step 6.
- BARO: more than 72.2 kPa {542 mmHg, 21.3 inHg}
- IAT: 5-40 ° C {41-104 ° F}
- FTL: 15-85%
- B+: more than 10.9 V

5. With the vehicle stopped, race the engine at the engine speed indicated, and then drive the vehicle as shown in the graph. The driving conditions before driving at constant speed are not specified. If possible, monitor RPM PID for engine speed during this procedure.

Step 1-Step 12:






6. Turn the ignition switch off.
7. Access the ON BOARD SYSTEM READINESS to verify the OBD monitoring status.
- If completed, all of the OBD monitoring status items change from non-completed to completed.
- If not completed, turn the ignition switch off, then perform the applicable specific drive mode for any monitoring item that was not in the detection condition.

8. Access the DIAGNOSTIC MONITORING TEST RESULTS to verify the monitor results.
- If detected values are not within specification, repair has not been completed.
pro multis · About Operation CHARM