Emission Control System Application Guides

Overview

• ECS Application Guides are quick reference tools for identifying emission control components.
• Do not replace smog check or Automotive Repair Act laws.
• Help determine emission control system configuration when labels are missing or illegible.
• Online/computer-based subscription services offer up-to-date information.

Categories in ECS Guides

• Diagnostic Connector Location Guide
• Emission Control Abbreviations
• Traction Control Disable Procedures
• Emission Control Applications
• EGR Function Testing
• Base Ignition Timing Specifications
• OBD2 Drive Cycles

Importance of ECS Guides

• Locate diagnostic connectors which vary by manufacturer.
• Familiarize with emission control abbreviations.
• Determine vehicle compatibility with two-wheel dynamometer.
  • Prevent operating AWD or non-disengageable traction control vehicles on inappropriate equipment.
  • Example: No Acura MDX on ASM dynamometer; Acura NSX can be used after disabling traction control.

Emission Control Applications

• Vehicles grouped by make, model year, engine size.
• Lists required emission components for each group.
• Footnotes provide detailed information (e.g., EGR requirements).
• Example: 1993 Ford, 1.9L engine, California vs. Federal emission standards.

Testing Procedures

• ECS Guide specifies test procedures (e.g., EGR Test Procedure No. 4 for California-certified Ford).
• Guides provide timing specifications and conditions.
• Discrepancies between label and guide, label takes precedence.

OBD2 Drive Cycles

• Required for 1996 and newer vehicles to pass smog check.
• ECS Guides detail emission monitors' drive cycles.
• Review manufacturer recalls and TSBs for additional information.

Conclusion

• Essential tool for inspectors to correctly conduct smog checks.
• Ensures compliance with emission standards and prevents false pass/fail results.