Thursday, December 16, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 1527

2010 Cadillac Truck SRX FWD V6-3.0L Page 1527



Typical Scan Tool Data



Circuit/System Description



The engine cooling fan system is composed of one cooling fan, a series of 5 relays, the engine control module (ECM), and the associated wiring.



The cooling fan assembly includes two individual resistors mounted to each side of the cooling fan shroud. This combination of components



enables the ECM to operate the cooling fan at 3 speeds using two fan control circuits.



To operate the fan, the ECM activates the applicable relay by grounding the control circuit with a solid state device called a driver. The driver is



equipped with a feedback circuit. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the



feedback voltage.



Conditions for Running the DTC

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