Sebring L4-122 2.0L DOHC VIN Y MFI (1995)
Malfunction Indicator Lamp: Description and Operation
OPERATION
Self Test
As a functional test, the malfunction indicator lamp (MIL) illuminates at key-on before engine cranking.
Trouble Code Set Operation
Whenever the Powertrain Control Module (PCM) sets a diagnostic trouble code that effects vehicle emissions, it illuminates the MIL.
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The PCM illuminates the MIL only for diagnostic trouble codes that effect vehicle emissions.
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The MIL remains on until the diagnostic trouble code is erased.
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When the ignition switch is turned OFF, the lamp goes out.
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Even if the ignition switch is turned ON again, the lamp does not come on until the irregularity is detected.
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After that, if the PCM does not re-detect the malfunction for 51 drives, the diagnostic trouble code will be erased from the PCM memory.
ITEMS INDICATED BY THE CHECK ENGINE/MALFUNCTION INDICATOR LAMP
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No cam signal at PCM MAP sensor voltage too high
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Front bank O2S stays above center (rich) Slow change in idle MAP sensor signal
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Front bank O2S stays below center (lean) EGR system failure
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Rear bank O2S stays above center (rich) Intake air temperature sensor voltage low
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Rear bank O2S stays below center (lean) Intake air temperature sensor voltage high
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EGR solenoid circuit Injector #4 control circuit
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EVAP purge solenoid circuit Front bank O2S shorted to voltage
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Injector #3 control circuit Rear bank O2S stays at center
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Injector #2 control circuit Rear bank O2S shorted to voltage
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Injector #1 control circuit Injector #5 control circuit
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Idle air control motor circuit Injector #6 control circuit
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Throttle position sensor voltage low Battery temperature sensor volts out of limit
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Throttle position sensor voltage high Low speed fan control relay circuit
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Engine coolant temperature sensor voltage too low Fuel pump relay control circuit
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Engine coolant temperature sensor voltage too high No 5 volts to MAP sensor
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Front bank HO2S stays at center No 5 volts to throttle position sensor
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No vehicle speed sensor signal Intermittent loss of camshaft position or crankshaft position
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MAP sensor voltage too low Speed control switch always high
CAUTION: If the check engine/malfunction indicator lamp illuminates because of a malfunction of the PCM, transmission between the scan tool and
the PCM cannot occur. In this case, the diagnostic trouble code cannot be read.