MÃ LỖI C1292 TRÊN XE Ô TÔ Kia Morning - P4

Page 1
1/4/2012 9:50:37 PM />
2009 > G 1.1 SOHC > Steering > Electronic Power Steering >

Language

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
DTC
strategy
●
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
fail
safe
● Motor :
OFF
● Relay :
OFF
● Fail lamp
: ON
●
Restoration
condition :
Power
"OFF"
Schematic Diagram
Signal Waveform
Page 2
1/4/2012 9:50:37 PM />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