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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 109 (ENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - 3.4L)INSPECTION/MAINTENANCE PROCEDURESINSPECTION/MAINTENANCE EGR SYSTEM SET PROCEDUREDIAGNOSTIC PROCEDURES
2004 Oldsmobile Bravada RWD

Diagnostic Procedures

2004 Oldsmobile Bravada RWDSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Inspection/Maintenance (I/M) System Check? If yes, go to next step. If no, go to INSPECTION/MAINTENANCE SYSTEM CHECK .
    2. WARNING: Road test a vehicle under safe conditions and while obeying all traffic laws. DO NOT attempt any maneuvers that could jeopardize vehicle control and could result in serious personal injury and vehicle damage.
  2. Ensure vehicle is within the Conditions for Running. See CONDITIONS FOR RUNNING . Turn OFF all accessories, e.g., A/C, blower fan, etc. Start and allow engine to idle. Accelerate at part throttle to 45 MPH with this speed maintained for 1 minute. Perform 4 decelerations of 25 seconds each from 45 MPH while the following criteria is maintained: Throttle is closed, no brake application, no manual downshift, vehicle speed remains greater than 25 MPH. After each deceleration period, vehicle is returned to 45 MPH under part throttle acceleration and speed is maintained for 15 seconds. With a scan tool, observe the I/M System Status display. Did the EGR System Status update to YES? If yes, go to step  5. If no, go to next step.
  3. Using scan tool, observe DTC Information. Does the scan tool indicate any failed DTCs? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
    4. NOTE: Refer to INSPECTION/MAINTENANCE SYSTEM DTCS  to determine which DTCs are required to run in order to complete this test.
  4. Using scan tool, observe the Not Ran Since Code Cleared display. Determine which of the DTCs required for a YES status has not run. Operate vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING . Repeat the procedure until the scan tool indicates the diagnostic test has run or for any additional required DTCs that have not run. Using scan tool, observe the I/M System Status display. Did the EGR system Status update to YES? If yes, go to next step. If no, go to DIAGNOSTIC AIDS .
  5. Using scan tool, observe the emission related DTC portion of I/M System Status display. Does the scan tool indicate any emission related DTCs set? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.