Failure diagnosis results are output as diagnosic codes and are displayed on malfuction indicator lamp. when the diagnostic code output terminal is turned to the ON position. The MIL is the error lamp demanded by the EOBD for exhaust-relevant errors. Energizing by the MIL is done under the MIL lamp test is active or a path with the characteristic " MIL blinking " is preliminary entered in the memory. Then the MIL blinks. In case of the engine check failure, the engine check lamp will not illuminates to notify the driver.

If the enine check lamp circuit is short to battery line during two driving cycles, this code will be set.