Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Cooling Fan Description and Operation (LWE, LUW)

Chevrolet Sonic Repair Manual / Powertrain / Engine / Engine Cooling / Radiator Fan / Cooling Fan Description and Operation (LWE, LUW)

System Overview

The engine cooling fan system is composed of one cooling fan, 2 relays, the engine control module (ECM), and the associated wiring. The cooling fan assembly includes 1 resistor mounted in the cooling fan shroud. The cooling fan resistor may be a stand alone component, or a part of the cooling fan motor and harness assembly. This combination of components enables the ECM to operate the cooling fan at 2 speeds using two fan control circuits. The ECM will operate the cooling fan at either Low or High speed based on the cooling requirements.

Low Speed Operation

The ECM applies ground at the FAN 1 control circuit for the coil side of the low speed cooling fan relay. The energized low speed relay switch closes to supply B+ through the cooling fan resistor, to the engine cooling fan motor. The result is cooling fan operation at a reduced speed.

High Speed Operation

The ECM applies ground at the FAN 2 control circuit for the coil side of the cooling fan high speed relay. The energized high speed relay switch closes to supply B+ directly to the engine cooling fan motor, by-passing the cooling fan resistor. The result is cooling fan operation at full speed.

Cooling Fan Description and Operation (LUV)
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 resistor ...

Engine Coolant Fan Shroud Replacement (LDE LUW)
Engine Coolant Fan Shroud Replacement Callout Component Name Preliminary Procedure Remove the radiator surge tank. Refer to Radiato ...

Other materials:

Radio Antenna Base Replacement
Radio Antenna Base Replacement Callout Component Name Preliminary Procedure Lower the rear of the headlining trim panel. Refer to Headlining Trim Panel Replacement. 1 Radio Antenna Base Fastener ...

Special Tools
Illustration Tool Number/Description EL–50334–20 Multi-Media Interface Tester (MIT) EL–50334–50 USB Cable and Adapter Kit EL-48028 Digital Radio Test ...

Cargo Cover (Hatchback)
Warning: An unsecured cargo cover could strike people in a sudden stop or turn, or in a crash. Store the cargo cover securely or remove it from the vehicle. The cargo cover can be used to cover items in the rear of the vehicle. To remove the cargo cover: Remove both of the cords fr ...

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