Self Test/Continuous Memory and Clear DTCs

During vehicle operation, the RCM  / OCSM  will detect and store both intermittent and hard failure DTCs in non-volatile memory. The DTC strategy employed by the RCM  / OCSM  incorporates a time-out scheme for determining when a concern exists in the system. This requires a concern to exist for up to one minute in the system before the RCM  / OCSM  will detect it. For the RCM  / OCSM  to determine that a concern no longer exists, the concern must be absent for up to one minute. The actual detection time-outs vary with each DTC and module.

Once 75 hours of operation have been recorded by the RCM  and the OCSM  since the concern was last detected, all CMDTCs  will automatically be removed from memory.