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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 330 (Engine Controls - Self-Diagnostics - 3.0L) >> Diagnostic Tests >> DTC P0621: Generator Light L-Terminal Control Circuit >> Conditions For Setting DTC

Conditions For Setting DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

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

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

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