Supra Sport Roof L6-2997cc 3.0L DOHC MFI (1998)
Malfunction Indicator Lamp: Description and Operation
OBD II regulations require that the vehicle's on-board computer lights up the Malfunction Indicator Lamp (MIL) on the instrument panel when the
computer detects a malfunction in the computer itself or in drive system components which affect vehicle emissions. In addition to the MIL lighting up
when a malfunction is detected, the applicable Diagnostic Trouble Codes (DTC) prescribed by SAE J2012 are recorded in the ECM memory. If the
malfunction has been repaired, the MIL goes off automatically but the DTCs remain recorded in the ECM memory.
