System Readiness Test: Description

As part of an enhanced emissions test for inspection and maintenance, certain states require the status of System Readiness Test (SRT) be used to indicate whether the ECM has completed the self-diagnosis of major emission systems and components. Completion must be verified in order for the emissions inspection to proceed.

The SRT will indicate incomplete if the self-diagnosis memory is erased for any reason or if the ECM memory power is interrupted for several hours.

If a vehicle is rejected for a state emissions inspection due to one or more SRT items indicating INCMP, use this information to set the SRT to CMPLT.

In most cases, the ECM will automatically complete its self-diagnosis cycle during normal usage, and SRT status will indicate CMPLT for each application system. Once set as CMPLT, the SRT status remains CMPLT until the self-diagnosis memory is erased.

Occasionally, certain potions of the self-diagnostic test may not be completed as a result of the customer's normal driving pattern. The SRT will indicate INCMP for these items.