Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
If it fails:
lemon-manuals.org.ua
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Emission Control Systems: Testing and Inspection
The technician should be aware that diagnosis and testing of the emission control system should begin at the
Powertrain Management level, where testing begins with "general" symptom diagnosis, and is narrowed to testing of a "specific" subsystem and it's related wiring and components. Following the appropriate diagnostic routines may prevent misdiagnosis and unnecessary component replacement. Refer to
Powertrain Management/Testing and Inspection/Procedures.