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Home >> Cadillac >> 2003 >> CTS Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Drive Cycles >> Inspection/Maintenance System Check >> Diagnostic Procedures

Diagnostic Procedures

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 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. Check for applicable Technical Service Bulletins (TSB) for software updates that may prevent Inspection/Maintenance (I/M) readiness. Perform any reprogramming or repairs indicated by TSBs. Was a reprogramming or repair service required? If yes, go to INSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURE . If no, go to next step.
  3. Using scan tool, observe 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, perform appropriate I/M system set procedure for indicated system.
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