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:

Clearcoat Repair without Repainting
Repair Procedure Thoroughly wash the repair area with Liquid Wash and Wax GM?€‰P/N?€‰1052870 or the equivalent. Environmental damage may be corrected. Refer to Environmental Fallout (Acid Rain) or Rail Dust Damage Repair. Important: Follow all of the instruc ...

Neutral - Engine Running (Gen 1)
When the gear selector is moved to the Neutral (N) position, the hydraulic and electrical system operation is identical to Park (P) range. However, if Neutral is selected after the vehicle was operating in Reverse (R), the normally-high 35R pressure control solenoid 2 is commanded OFF and the ...

Control Valve Body Assembly Disassemble (Gen 1)
Control Valve Body Assembly Disassemble Callout Component Name 1 Control Solenoid Valve Support 2 Control Valve Body Bolt M5 x 40.5 (Qty: 1) 3 ...

© 2014-2019 Copyright www.csmans.com
   
0.0149