Hyundai Santa Fe (2006 year). Manual — part 232
BR -100
BRAKE SYSTEM
DTC C1237 PRESSURE SENSOR - OTHER
COMPONENT LOCATION
E5C4A680
Refer to DTC C1235.
GENERAL DESCRIPTION
ECEA85DD
Refer to DTC C1235.
DTC DESCRIPTION
EB4647FA
With the driver torque demand and the lateral acceleration a driver braking demand is calculated. Unless the pump motor
is opreating or there is a brake signal, The offset compensation is executed. A failure is detected if offset value exceeded
±15 bar.
DTC DETECTING CONDITION
E6FCF23F
Item
Detecting Condition
Possible cause
DTC Strategy
• Voltage Monitoring
Monitoring
Period
• After Pressure sensor initialization.
• No under voltage
• No pumps are running.
• No BLS-signal is set.
Enable
Conditions
• The pressure sensor-offset value must be in the range of ±
15 bar. A failure is detected if this range is exceeded.
Fail Safe
• Reduced function caused by inoperative pressure
sensor signal.
• Sensor failure outside the ABS control cycle
- Only the ABS/ESP functions are inhibited, allow the EBD.
The ABS/ESP warning lamps are activated and the EBD
• Open or short of pressure
sensor circuit
• Inoperative pressure sensor
• Inoperative HECU
MONITOR SCANTOOL DATA
ECBE89B1
Refer to DTC C1235.
COMPONENT INSPECTION
E1A41FFE
Refer to DTC C1235.
VERIFICATION OF VEHICLE REPAIR
E6D7E347
Refer to DTC C1101.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -101
DTC C1260 STEERING ANGLE SENSOR - SIGNAL
COMPONENT LOCATION
E581E002
Steering angle sensor
Clock spring
EJBF502V
GENERAL DESCRIPTION
E13280AC
The Steering angle sensor(SAS) is joined to the multi function switch and uses a CAN communication. The SAS is used to
determine turning direction and speed of the steering wheel. The HECU uses the signals from the SAS when performing
ESP-related calculations.
DTC DESCRIPTION
E9756B8F
If the SAS signal is different from calculated value by yaw-rate sensor and wheel speed sensor, mechanically impossible
SAS signal is detected, there is a difference between SAS signal and driving condition of the vehicle calculated from
yaw-rate sensor and lateral G sensor, a failure is detected.
DTC DETECTING CONDITION
E0CC8DDA
Item
Detecting Condition
Possible cause
DTC Strategy
• Signal Monitoring
Monitoring
Period
• Continuous
Case 1
Enable
Conditions
• During normal driving conditions the long time
filtered driving direction is straight ahead. The
long time filtered SAS-value is equivalent to the
offset. If the offset value exceeds a threshold of
approximately 15 deg a SAS-fault is determined.
Failure detection time depends on the driving
distance, vehicle speed and on the amount of failed
SAS signal. Within 30 km of symmetrical driving the
calculated offset corresponds to the sensor offset.
• Open or short of steering
angle sensor circuit
• Inoperative steering angle
sensor
• Inoperative HECU
BR -102
BRAKE SYSTEM
Item
Detecting Condition
Possible cause
Monitoring
Period
• Continous (If the following conditions are satisfied)
1)
After SAS-initialization and vehicle reference
speed
>
1.4 m/s (5 km/h)
2)
No under voltage
3)
At least one SAS-message was sent in
the current 20 ms-cycle.
Case 2
Enable
Conditions
• A SAS-gradient-failure is set, if
1)
Signal gradient (steering angle velocity)
from one 20 ms-cycle to another is
higher than 40 or
2)
Change of this gradient (steering angle
acceleration) is higher than 15 : | (LwInK0K1
. LwInK1K2)|
>
15 and | (LwInK0K1
+ LwInK1K2)|
>
15
- LwInK0K1 : Difference of the SAS-signal
between the current 20 ms-cycle and
the last 20 ms-cycle.
- LwInK1K2 : Difference of the SAS-signal
between the last 20 ms-cycle and 20
ms-cycle before.
Monitoring
Period
• Continuous (After initialization and no
under voltage detected)
Case 3
Enable
Conditions
• If value is higher than 665 + 90 tolerance for
more than 300 ms a fault is determined.
Monitoring
Period
• Continuous (during driving)
Case 4
Enable
Conditions
• Based on a vehicle model a reference SAS signal
is build. The difference between measured SAS
signal and SAS signal calculated from yaw-rate
sensor signal is evaluated for fault detection.
Dependent on the driving conditions failures in size
of [10 + 60 m/s / vehicle reference speed] deg at
steering angle are recognized within 400 ~ 4800
ms through three possible recognition paths:
1)
Curve Branch (lateral G
>
2 m/s
²
and
left and right curve driving)
2)
Stability Branch (no large wheel speed
differences and stable acceleration)
3)
Straight ahead Branch (lateral G
<
0.5
m/s
²
and yaw rate
<
2 deg/s).
The recognition time depends on the active
branch (the time is shorter in a relation
1):2):3)-4:2:1) and the value of the permissible
time threshold dependent on the deviation
between the compared signals (small
deviation
→
long detection time, large
deviation
→
small detection time).
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -103
Item
Detecting Condition
Possible cause
Monitoring
Period
• Initialization once in every ignition cycle.
• The monitoring is active until a reset by a
change in the SAS signal or until a right and
left cornering can be recognized.
Case 5
Enable
Conditions
• If there is no change in the signal, but a right
and left cornering has been recognized, a fault is
determined. (lateral G
>
2 m/s
²
in combination
with a yaw rate
>
6 /s in both directions).
- At a minimum change of e.g. 5 in the
signal, the monitoring is reset.
Monitoring
Period
• Continuous (during driving)
Case 6
Enable
Conditions
• The measured yaw rate and the yaw rates,
calculated from the wheel speed sensor and SAS
are compared. If the signals don
’
t fit and forwards
driving is detected, a fault is determined.
Monitoring
Period
• Continuous (during driving)
Case 7
Enable
Conditions
• Under normal conditions, two SAS messages
are sent in one 20 ms cycle, which is shown
by an increase of the message counter by
2. If the message counter shows an increase
higher than 3 or lower than 1 in one 20 ms-cyle,
a fault is stored after 160 ms.
Fail Safe
• Reduced controller function caused by inoperative
SAS signal. ABS/EBD control is available.
• The ESP warning lamp is activated.
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