Inspection & Maintenance (I/M) - Technical Guidance & Test Procedures
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I/M Test Procedures
- The IM240 Transient I/M Dynamometer Driving Schedule and The Composite I/M Test Procedure (PDF) (18pp, 154K, January 1991)
IM240 Technical Guidance
- November 2000 Inspection/Maintenance Testing Lookup Tables, v 1.8.5
- Read Me File
- Data Format
- Lookup Table Data (EXE) (403K, downloadable, self-extracting into five data files)
- October 3, 2000 Final Report (PDF) (41pp, 126K)
- IM240 & Evap Technical Guidance (PDF) (113pp, 1.8M, EPA420-R-00-007, April, 2000)
- August 1998 IM240 and Evap Technical Guidance (EPA420-R-98-010, August 1998, replaces 3/98 draft revised guidance)
- Body of Report (PDF) (51pp, 370K)
- Appendix A (PDF) (7pp, 310K)
- Appendix B (PDF) (16pp, 790K)
- Appendix C (PDF) (41pp, 480K)
- Appendix D Fast Pass Coefficients & Example Calculations (ZIP XLS) (500K)
- Full Report (PDF) (112pp, 1.3M, EPA420-R-98-010, August 1998)
- June 1996 Draft Revised IM240 Technical Guidance: High-Tech I/M Test Procedures, Emission Standards, Quality Control Requirements, and Equipment Specifications: IM240 and Functional Evaporative System Tests (PDF) (87pp, 414K, EPA-AA-RSPD-IM-96-1, June 1996)
- July 1994: High Tech Inspection and Maintenance Tests (Procedures and Equipment) (PDF) (6pp, 66K, EPA400-F-93-005)
High-Tech Tests for High-Tech Vehicles
Acceleration Simulation Modes (ASM)
- Acceleration Simulation Mode Test Procedures, Emission Standards, Quality Control Requirements, and Equipment Specifications Final Technical Guidance (PDF) (57pp, 1.1M, EPA420-B-04-011, July, 2004)
- June 26, 1996 Final ASM Test Procedure Documentation (PDF) (46pp, 185K, EPA-AA-RSPD-IM-96-2, July 1996)
- Evaluation of a Four-Mode Steady-State Test with Acceleration Simulation Modes (ASM) as an Alternative Enhanced I/M Test (May, 1993 Report).
- ASM Revised Draft Test Procedure (PDF) (14pp, 37K)
- Appendices (PDF) (118pp, 469K)
- Report (PDF) (115pp, 394K)