- THÔNG TIN MÃ LỖI - KIỂM TRA BẰNG MÁY CHẨN ĐOÁN - KIỂM TRA BẰNG SƠ ĐỒ MẠCH ĐIỆN - KIỂM TRA CẢM BIẾN
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Component Location
General Description
A torque sensor, installed in the middle of steering column, is one unit composed of a main sensor and sub sensor When the steering wheel is turned, the torsion bar
is twisted in proportion to load of the wheel, and the assembled shaft turns as well At this moment, due to twist of shaft, a change in the magnetic field is generated in main sensor coil surrounds the shaft and in the sub-sensor coil which is inside torque sensor The change in current produced by this process is input to the EPS CM With a change of input sensor signal current, EPS CM determines driver’s steering direction then, comparing current differences between the two sensors, the EPS
CM determines whether main sensor is open/short The Torque sensor can be damaged during disassembly of the sensor You must disassemble or remove the sensor when removing or replacing the assembly
DTC Description
If the torque sensor creates similar sensor signal outputs in main sensor and sub sensor This DTC code is set when the EPS CM compares the output signal current from main and sub sensor, and the current differences between the two sensors are too wide, or when the main sensor and sub-sensor signals vary too dramatically, due to major differences between standard and instant errors in the output signals, when power is supplied to torque sensor
DTC Detecting Condition
Item Detecting Condition Possible cause strategyDTC ●Current
check
● Open/
short in main signal circuit
● Open/
short in sub signal circuit
● Contact resistance in connections
● Faulty sensor
Enable conditions
● Torque sensor voltage
≥ 7.0 V
Threshold value
● [Main sensor -Sub sensor]
> 0.75
mA or [Average error value -Moment error value]
and Main &
Sub value >
0.5 mA
Diagnosis time ●1sec safefail
● Motor : OFF
● Relay : OFF
● Fail lamp : ON
● Restoration condition : Power
"OFF"
Schematic Diagram
Signal Waveform
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Fig.1) When turning steering wheel to right : Check whether signal voltage rises to maximum 4V based on 2.5V and main sensor signal is the same as sub sensor signal [Main sensor - Sub sensor] < 0.75 mA
Fig.2) When turning steering wheel to left : Check whether signal voltage descends to maximum 1V based on 2.5V and main sensor signal is the same as sub sensor signal [Main sensor - Sub sensor] < 0.75 mA