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Home >> Saturn >> 2003 >> L300 >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System & Starting System >> Diagnostic Tests >> DTC P0621: Generator Light L-Terminal Control Circuit >> Conditions For Setting DTC
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Conditions For Setting DTC

During key ON test, the ECM/PCM detects a high signal voltage on the generator turn on signal circuit for at least 5 seconds.

During the RUN test, the ECM/PCM detects a low signal voltage on the generator turn on signal circuit for at least 10 seconds.

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