Previa Van DX 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
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 does not recur in 3 trips, the MIL goes off but the DTC remain recorded in the ECM memory.