LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2003 >> Astro Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Controls Self-Diagnostics - 2.2L) >> Drive Cycles >> Inspection/Maintenance System Check >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Many DTC related repairs will instruct the technician to clear the DTC information. This procedure will reset ALL of the I/M system Status indicators to NO, and require performing the I/M Complete System Set Procedure.
  1. Perform powertrain diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. Repair any DTCs or driveability concerns that would prevent the I/M system Status tests from completing. Did you find and repair a DTC or driveability concern? If yes, go to step  3. If no, go to next step.
  2. Review any service bulletins for software updates that may prevent I/M readiness. Perform any reprogramming or repairs indicated by the service bulletins. Was a repair service required? If yes, go to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE . If no, go next step.
  3. Using scan tool, observe the I/M system Status display. Is more than one test indicating a NO status? If yes, go to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE . If no, go to appropriate INSPECTION/MAINTENANCE SYSTEM SET procedure for the indicated system.
scientia non olet · About LEMON Manuals