Mode 4 - EVAP System Repair Verification Drive Mode
NOTE:
If Mode 4 can not be performed because it is impossible to drive vehicle under Mode 4 conditions, perform evaporative system test procedure as an alternative. See FUEL EVAPORATIVE SYSTEM (MIATA & MPV)
under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. Mode 4 can be performed regardless of RFCFLAG status.
- Verify that all following PIDs are within specification before engine is started to initiate evaporative monitoring:
- Barometric pressure (BARO) is 21.3 IN. Hg (72 kPa).
- Fuel Tank Level (FTL) PID is .24-2.0 volts.
- Intake Air Temperature (IAT) is 14-140°F (-10-60°C).
- Engine Coolant Temperature (ECT) is 14-95°F (-10-35°C).
- Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
- Start engine and race at 3500 RPM until it reaches normal operating temperature. Drive vehicle as shown in graph. See Fig 1.
- Stop vehicle and access ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTIONS to inspect completion status. Test is complete when Readiness Function Check (RFC) flag changes from NO to YES. Go to next step. If test is not complete, turn ignition off and go back to step 3.
- Access DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to inspect monitor results. If MEAS values of 10:21:00 and 10:22:00 are within specification, repair is completed. If MEAS values of 10:21:00 and 10:22:00 are not within specification, repair is not completed.
- Verify no DTCs are available.