TORQUE SENSOR
id061300245400
Purpose/ Function
• The torque sensor detects the steering torque and the steering direction, and outputs the signal to the Electric Power Steering (EPS) control module (CM).
Construction, Operation
• The non-contact type torque sensor is installed to the top of the steering column and consists of the following parts.
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― Torsion bar: Connects the input shaft and output shaft.
― Input shaft: When the steering torque is input, the magnetic field is changed.
― Output shaft: Torque from the EPS motor is transmitted to the intermediate shaft.
― Coil: Assembled onto each shaft, converts magnetic field of input shaft to an electric signal.
― Electric circuit board: Inputs the coil electric signal to the EPS CM.
Operation
• When the steering wheel is operated, the torsion bar connecting the input and output shafts twists.
• From the twisting of the torsion bar, the input and output shafts move relative to each other.As a result, the positions of the input shaft window and output shaft projection change, and the electric field is changed.
• The coil converts the change in electric field to an electric signal and the electric circuit board outputs it to the EPS CM.
• The EPS CM calculates the electric signal from this torque sensor internally and uses it for various controls as a steering torque signal.
Fail-safe
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DTC No.
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Fail-safe function
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C200B:02
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• Control disabled
• Power steering malfunction indicator light: Illuminated
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C200B:1C
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C200B:49
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C200B:62
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C200B:85
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C200C:1C
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