Elantra GLS Sedan L4-2.0L (1999)
Malfunction Indicator Lamp: Description and Operation
DESCRIPTION
The Malfunction Indicator lamp (MIL) request signal wire is used by the Transaxle Control module (TCM) to signal the ECM to set transaxle related
codes.
THE RELATIONSHIP BETWEEN DTC, MIL AND DRIVING PATTERN
1. When the same malfunction is detected and maintained during two sequential driving cycles, MIL will automatically light.
2. MIL will go off automatically after 3 sequential driving cycles without the same malfunctions.
3. After the ECM first detects a malfunction, a diagnostic trouble code is recorded when the engine is restarted and the same malfunction is
re-detected. However, for misfire and CKP sensor, diagnostic trouble codes are recorded on the first detection of the malfunction.
4. After recording the diagnostic trouble code, if the ECM does not re-detect the malfunction 80 warm-up cycles, the diagnostic trouble code will be
erased automatically from the ECM memory.
NOTE:
1. A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by at least 40 degrees Fahrenheit from
engine starting and reaches a minimum temperature of 160 degrees Fahrenheit.
2. A "driving cycle" consists of engine start-up, vehicle operation beyond the beginning of closed loop operation.
MALFUNCTION INDICATOR LAMP (MIL)
An On Board Diagnostic lamp comes on to notify the driver that there is a problem in the vehicle.
However MIL will go off automatically after 3 sequential driving cycles without the same malfunction.
Immediately after the ignition switch is turned on (ON position), the malfunction indicator light is lit continuously to indicate that the malfunction
indicator light operates normally.
Following Items will be Indicated by the MIL
-
Catalyst
-
Fuel system
-
Mass Air Flow Sensor
-
Intake Air Temperature Sensor
