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Part name
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Function
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Electronic control coupling (4WD solenoid)
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• Based on a signal from the 4WD CM, it operates the electromagnetic clutch and transmits drive torque to the rear wheels.
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Differential oil temperature sensor
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• Informs the 4WD CM of the rear differential oil temperature.
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4WD CM
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• Controls operation of the electronic control coupling (4WD solenoid) based on signals input from the accelerator pedal opening angle, wheel speed, differential oil temperature and other sensors.
• Outputs coupling control condition and 4WD warning control information as a CAN signal.
• Controls the on-board diagnostic system and the fail-safe system if there is a malfunction in the 4WD system.
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4WD warning light
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• Illuminates or flashes to alert driver of a malfunction or control failure in the 4WD system.
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PCM
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• Sends the accelerator pedal opening angle, engine speed signal and gear position signal and other signals, as CAN signals, to the 4WD CM.
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DSC HU/CM
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• Sends the four-wheel speed, DSC operating condition signal, steering wheel angle signal and other signals, as CAN signals, to the 4WD CM.
• Sends the coupling torque request signal, as a CAN signal, to the 4WD CM.
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