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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> DTC P00B7: Engine Coolant Flow (LUV) >> Circuit Description

Circuit Description

The engine control module (ECM) monitors the temperature of the engine radiator coolant. The ECM uses a pulse width modulated (PWM) signal to control the electrical thermostat heater circuit. The ECM compares the radiator coolant temperature to the engine coolant temperature in order to determine if there is sufficient coolant flow through the thermostat.

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