- Ensure that the vehicle meets the conditions for a cold start listed above.
NOTE:
Whenever the ignition is turned ON, ignition positive voltage is supplied to the heated oxygen sensor (HO2S) heaters. After verifying the enable criteria, turn OFF the ignition for approximately 5 min to allow the sensors to cool before continuing with the test. When the engine is started, DO NOT turn the engine OFF for the remaining portion of the set procedure.
- The evaporative emission inspection/maintenance system status indicator should display YES.
- If the inspection/maintenance system status indicator displays NO, perform the Service Bay Test, if applicable. If the Service Bay Test is NOT available, it may take up to 6 drive cycles, with up to 17 h between drive cycles, for the inspection/maintenance system status indicator to transition to YES.
- The O2S Heater inspection/maintenance system status indicator should display YES.
- If the O2S Heater inspection/maintenance system status indicator displays NO, ensure that the ignition has been turned OFF for at least 10 h.
- Turn OFF all accessories; HVAC system, other electrical loads, including aftermarket/add-on equipment, etc.
- Set the vehicle parking brake and ensure the vehicle is in Park for automatic transmission or Neutral for manual transmission.
- Turn OFF all accessories; HVAC system, other electrical loads, including aftermarket/add-on equipment, etc.
- Start and idle the engine for at least 2 min and until 65°C (149°F) is achieved.
- Run the engine for 6.5 min within the following conditions:
- MAF parameter between 4-30 g/s
- Engine speed steady between 1, 000-3, 000 RPM
- Return the engine to idle for 1 minute.
- Apply and hold the brake pedal and shift to Drive for automatic transmission or apply the clutch pedal for manual transmission and operate the vehicle within the following conditions for 2 min:
- Depress the accelerator pedal until throttle position sensor angle is more than 2%.
- Mass air flow signal between 15-30 g/s
- RPM steady between 1, 200-2, 000 RPM
- Release the accelerator pedal and shift the vehicle to Park for automatic transmission or Neutral and release the clutch pedal for manual transmission and allow the engine to idle for 2 min.
NOTE:
DO NOT touch the accelerator pedal during the idle period. A change in throttle position sensor angle or an increase in engine speed may invalidate this portion of the test.
- Quickly depress the accelerator pedal until throttle position sensor angle is more than 8% and return to idle, repeat 3 times.
- Allow engine to idle for at least 2 min.
- Release the parking brake and drive vehicle at 24 km/h (15 mph) or slower for 2 min.
- Continue to drive the vehicle for at least 5.5 mi between 45-112 km/h (28-70 mph) with the vehicle reaching at least 80 km/h (50 mph).
- Release the accelerator pedal for at least 2 s. This will allow the vehicle to enter decel fuel cut-off.
- Depress the accelerator pedal until the throttle position sensor angle is increased 3-20% and maintain a safe speed for 1 min.
- Safely stop the vehicle, with the engine in Drive for automatic transmission or in Neutral with the clutch pedal depressed and parking brake applied for manual transmission, idle for 2 min.
- Shift to Park for automatic and apply the parking brake or neutral and release clutch pedal for manual.
- Turn OFF the ignition and exit the vehicle. Do NOT disturb the vehicle for 60 min.
NOTE:
DO NOT disturb the vehicle or turn ON the ignition until told to do so. Disturbing the vehicle may invalidate this portion of the test.
- Observe the Inspection/Maintenance System Status with a scan tool. All of the Inspection/Maintenance System Status indicators should display YES.
- If the evaporative emission Inspection/Maintenance System Status indicator displays NO, turn OFF the ignition for 17 h, ensure that the vehicle meets the conditions for a cold start and repeat steps 12-18 six more times or until the evaporative emission Inspection/Maintenance System Status indicator transitions to YES. If the indicator continues to display NO, refer to the Inspection/Maintenance (I/M) System DTC Table and/or Inspection/Maintenance (I/M) System DTC Table (HP9) to identify the DTCs that did not run. Follow the Conditions for Running the DTC in order to set the evaporative emission Inspection/Maintenance System Status indicator
- If any of the Inspection/Maintenance System Status display NO, refer to the Inspection/Maintenance (I/M) System DTC Table and/or Inspection/Maintenance (I/M) System DTC Table (HP9) for the indicator which did not display YES. The Inspection/Maintenance System DTC Table identifies the DTCs associated with each Inspection/Maintenance System Status Indicator. Follow the Conditions for Running the DTC in order to set the associated status indicator.
- Observe the I/M Test DTC information with a scan tool. Verify there are no I/M Test DTCs present.
NOTE:
An I/M Test DTC will not be stored or erased from the ECU except at the end of trip processing which occurs 5 s after ignition OFF.
- Observe the engine DTC information with a scan tool. Verify no DTCs are present.