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!

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On-Board System Readiness

On-Board System Readiness

Description

All OBD II scan tools display the On-board system readiness (OSR) test. The OSR will display the supported monitors on the vehicle and the status of all monitors (complete or not complete) at that time. Fuel, misfire and comprehensive component monitors run continuously and will always display CONT status. Only a PCM reset or a keep alive RAM reset will cause the non-continuous monitors to reinitialize to NO status.