Readiness Test Status

During different parameters of engine operation, the ECM/PCM monitors and runs tests on various inputs, outputs and system functions. There are 6 monitors. oNE MONITOR (Other Monitor) passively monitors for shorts, grounds and out of range parameters. It runs nearly continuously. The other 5 monitors actively test different systems and will only run when very specific engine operating conditions have been met. So those monitors may or may not run during any given drive cycle. These 5 monitors have a system readiness test to show whether the particular monitor has been run or not. Other Monitor does not show up in system readiness test list because it always runs.

When ECM/PCM DTCs are cleared, readiness test status is set to incomplete. To complete readiness test status, OBD-II drive cycle related to all on-board diagnostic items should be carried out. If vehicle is normal, readiness test status will complete by carrying out OBD-II drive cycle once. If ECM/PCM detects a malfunction, OBD-II drive cycle must be carried out again before readiness test status will complete. Once readiness test status is complete, ECM/PCM can be checked for DTCs.