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Home >> Chevrolet >> 2001 >> Lumina >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 3.1L >> Diagnostic Tests >> DTC P0480: Cooling Fan Relay No. 1 Control Circuit >> Circuit Description

Circuit Description

PCM uses an Output Driver Module (ODM) to control ground (control) circuit to cooling fan relay. Output driver module is also used by PCM to diagnose this circuit. If an improper voltage level has been detected on relay control circuit for 30 seconds or more, DTC will set.

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