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Engine Cooling - Except Evolution: Overview Mitsubishi Lancer IX

Cooling System (Mechanical) 2 illustrations ~534 words

GENERAL DESCRIPTION

The cooling system is designed to keep every part of the engine at appropriate temperature in whatever condition the engine may be operated. The cooling method is of the water-cooled, pressure forced circulation type in which the water pump pressurizes coolant and circulates it throughout the engine. If the coolant temperature exceeds the prescribed temperature, the thermostat opens to circulate the coolant through the radiator as well so that the heat absorbed by the coolant may be radiated into the air. The water pump is of the centrifugal type and is driven by the drive belt from the crankshaft. The radiator is the corrugated fin, down flow type.

Scheme 71

Scheme 71: CONSTRUCTION DIAGRAM
Scheme 71: CONSTRUCTION DIAGRAM

Scheme 72

Scheme 72: SPECIAL TOOLS
Scheme 72: SPECIAL TOOLS

CIRCUIT OPERATION

  1. The fan controller is powered from fusible link number 2.
  2. The ECM < M/T > or PCM < A/T > judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, automatic compressor controller, vehicle speed sensor and engine coolant temperature sensor. The ECM < M/T > or PCM < A/T > activates the fan controller to drive the radiator fan motor and condenser fan motor.

TECHNICAL DESCRIPTION

  1. The cause could be a malfunction of the fan controller power supply or ground circuit.
  2. The cause could also be a malfunction of the fan controller or the ECM < M/T > or PCM < A/T >.
  1. The fan controller is powered from fusible link number 2.
  2. The ECM < M/T > or PCM < A/T > judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, automatic compressor controller, vehicle speed sensor and engine coolant temperature sensor. The ECM < M/T > or PCM < A/T > activates the fan controller to drive the radiator fan motor and condenser fan motor.
  1. The fan controller has variable control of the radiator fan motor and the condenser fan motor speeds using signals transmitted from the ECM < M/T > or PCM < A/T >.
  1. The fan controller is powered from fusible link number 2.
  2. The ECM < M/T > or PCM < A/T > judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, automatic compressor controller, vehicle speed sensor and engine coolant temperature sensor. The ECM < M/T > or PCM < A/T > activates the fan controller to drive the radiator fan motor and condenser fan motor.
  1. The cause could be a malfunction of the radiator fan motor or an open circuit between the fan controller and the radiator fan motor.
  1. The fan controller is powered from fusible link number 2.
  2. The ECM < M/T > or PCM < A/T > judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, automatic compressor controller, vehicle speed sensor and engine coolant temperature sensor. The ECM < M/T > or PCM < A/T > activates the fan controller to drive the radiator fan motor and condenser fan motor.

The cause could be a malfunction of the condenser fan motor or fan controller.

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