System Readiness Test (SRT) Code
SYSTEM READINESS TEST (SRT) CODEInspection/Maintenance (I/M) tests of the on board diagnostic (OBD) II system may become the legal requirements in some states/areas. All SRT codes must be set in this case. Unless all SRT codes are set, conducting the I/M test may not be allowed.
SRT codes are set after diagnosis has been performed two or more times. This occurs regardless of whether the diagnosis results in "OK" or "NG", and whether or not the diagnosis is performed in consecutive trips.
The table above lists the four SRT items (7 diagnoses) for the ECCS used in U13 models.
Together with the DTC, the SRT code is cleared from the ECM memory using the method described later. This means that after ECCS components/system are repaired or after battery terminals remain disconnected for more than 24 hours, all SRT codes are possibly cleared from the ECM memory.