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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0481: Cooling Fan Control Relay No. 2 Circuit >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Saturn LW200, 2002 Saturn L200, and 2002 Saturn L100. However, it is still accessible from the selected car via links, so may be relevant.

To locate an intermittent problem, use scan tool to monitor FC RELAY 2 CKP OPEN SHORT TO GND while commanding FAN CONTROL 2 off. When a fault (open or short to ground) exists, scan tool will display YES. Then use scan tool to monitor FC RELAY 2 CKT SHORT TO VOLTS while commanding FAN CONTROL 2 on. When a fault (short to voltage or open PCM driver) exists, scan tool will display YES.

For fan control logic, see FAN CONTROL LOGIC  table under DTC P0480: COOLING FAN CONTROL RELAY NO. 1 CIRCUIT.

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