Mode 4 (EVAP system repair verification drive mode)
NOTE:
If Mode 4 can not be performed (you can not drive the vehicle under Mode 4 condition), perform evaporative system test procedure as an alternative. (Engine Performance - Testing and Diagnostics - System & Component Testing - Emission Systems & Sub-Systems - Fuel Evaporation.)
Mode 4 can be performed regardless RFC FLAG condition.
- Verify all following PIDs are within the following specifications. All PIDs must be within specifications before engine started to initiate the evaporative system test.
- BARO: 72.0 kPa {540 nmHg, 21.3 inHg} or higher
- IAT: 10-60 °C {50-140 °F}
- FTL V: 0.5-2.5 V
- ECT is -10 °C-X °C {14 °F-X °F} (X, the ECT upper limit, is determined according to the barometric pressure as shown the graph below.)Fig 1
- Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
- Start the engine and race it at 3,500 rpm to warm up completely.
- Drive the vehicle as shown in the graph.Fig 2
- Stop the vehicle and access to 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 go back to Step 1.
- Access to 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.
- Verify no DTCs are available.