Obd-Ii Drive Cycles - 2.0l Buick Regal V

Diagnostic Instructions

1. Perform the «DIAGNOSTIC SYSTEM CHECK - VEHICLE»(ref-452495-S15916133762012021500000) prior to using this diagnostic procedure.
2. Review «STRATEGY BASED DIAGNOSIS»(ref-452495-S40158285822012021500000) for an overview of the diagnostic approach.
3. «DIAGNOSTIC PROCEDURE INSTRUCTIONS»(ref-452495-S41076956242012021500000) provides an overview of each diagnostic category.

Description

The purpose of the Inspection/Maintenance Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M readiness diagnostics and complete the drive cycles for those particular diagnostics. When all I/M monitored diagnostic tests are completed, the I/M System Status indicators are set to YES. Perform the Inspection/Maintenance Complete System Set Procedure if any I/M System Status indicators are set to NO.

Conditions for Meeting a Cold Start

1. The ignition voltage between 10-18 V.
2. The barometric pressure (BARO) is more than 75 kPa (10.9 psi).
3. The engine coolant temperature (ECT) at start-up is less than 42°C (108°F).
4. The intake air temperature (IAT) is between 2-32°C (36-90°F).
5. The engine is OFF for greater than 6 hours or the following conditions must be met: The start-up IAT minus start-up ECT are within 12°C (22°F). The start-up ECT minus start-up IAT are within 50°C (90°F).
6. Fuel level is between 25 and 75 %.

Circuit/System Verification

Review the inspection/maintenance system status indicators with a scan tool. All I/M system status indicators should report YES, and no I/M Test DTCs should be present.

Inspection/Maintenance System Set Procedure

1. Ensure that the vehicle meets the conditions for a cold start listed above. If the inspection/maintenance system status indicator displays NO, perform the Service Bay Test, if applicable.
2. Turn OFF all accessories; HVAC system, other electrical loads, including aftermarket/add-on equipment, etc., and open the hood.
3. Set the vehicle parking brake and ensure the vehicle is in Park for automatic transmission or Neutral for manual transmission.
4. Start and idle the engine for 2 min.
5. Close the hood, release the parking brake and Accelerate at part throttle to 72-80 km/h (45-50 mph) with this speed maintained until the engine reaches operating temperature, 8-10 min.
6. Continue operation under these conditions for an additional 6 min.
7. Accelerate at part throttle to 90 km/h (55 mph) with this speed maintained for 2 min.
8. Release the accelerator pedal for at least 10 s. This will allow the vehicle to enter the decel fuel cut off.
9. Safely stop the vehicle, with the engine in drive for automatic or neutral with the clutch pedal depressed and parking brake applied for manual. Allow the vehicle to idle for 2 min.
10. Shift the vehicle to park for automatic and neutral for manual. Turn OFF the ignition and exit the vehicle. Do NOT disturb the vehicle for 8 hrs.
11. Observe the Inspection/Maintenance (I/M) System Status with a scan tool. All of the I/M System Status indicators should display YES. If the EVAP I/M System Status indicator displays NO, turn OFF the ignition, ensure that the vehicle meets the conditions for a cold start, and repeat steps 6-11 three more times, or until the EVAP I/M System Status indicator transitions to YES. If the indicator continues to display NO, refer to the appropriate INSPECTION/MAINTENANCE (I/M) SYSTEM DTC TABLE to identify the DTCs that did not run. If any of the I/M System Status indicators display NO, refer to the appropriate INSPECTION/MAINTENANCE (I/M) SYSTEM DTC TABLE for the indicator which did not display YES. The I/M System DTC Table identifies the DTCs associated with each I/M System Status Indicator.
12. Observe the I/M Test DTC information with a scan tool. Verify there are no I/M Test DTCs present. If an I/M Test DTC is set, diagnose the DTC using the appropriate DIAGNOSTIC TROUBLE CODE (DTC) LIST - VEHICLE and refer to INSPECTION/MAINTENANCE SYSTEM CHECK.
13. Observe the engine DTC information with a scan tool. Verify no DTCs are present. If a DTC is set, diagnose using the appropriate DIAGNOSTIC TROUBLE CODE (DTC) LIST - VEHICLE. After repairs, perform the INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE to verify no further DTCs are set.