Hyundai Santa Fe (2006 year). Manual — part 229
BR -88
BRAKE SYSTEM
Item
Detecting Condition
Possible cause
Monitoring
Period
• Continuous ( If vehicle speed
>
12 m/s)
- but this monitoring is disabled in the following event
1)
Aquaplaning.
2)
Interference.
3)
Supply voltage below 7.6 or above 18 Volts
Case2
Enable
Conditions
• No wheel speed signals within 10 ms to 20 ms
at a vehicle speed
>
12 m/s (43.2 km/h ).
- If the dynamic sensor monitor responses,
the failures will be stored into failure memory
immediately after a waiting period of 60 ms.
- If occurs low voltage active sensors during
the waiting period of 60 ms no failure is
stored in the EEPROM.
Monitoring
Period
• Main Monitoring
The main monitor needs additional information of
the ESP-sensors and is active for a velocity
>
20 km/h and no under voltage is detected.
• Backup Monitoring
- Continuous
Case3
Enable
Conditions
• Main Monitoring
1)
If the maximum difference of wheel speeds
related to maximum wheel speed exceeds 5 %.
2)
Detection filter time :
- The above conditions apply for 20 s for 1
inoperative wheel speed sensor.
- The above conditions apply for 40 s for 2
inoperative wheel speed sensor.
• Backup Monitoring
1)
If the deviation between the fastest and
the slowest wheel is below 6 % related
to the fastest wheel when the velocity
is higher than 50 km/h.
2)
When the velocity is below 50 km/h, if the
deviation is an absolute value of 3 km/h.
3)
Detection filter time : normally 20 s
- In case of a detected curve, the threshold is
increased with an additional value of 4 km/h.
Monitoring
Period
• Continuous
Case4
Enable
Conditions
• The pulse width of wheel speed sensor is below 2
ms when vehicle speed is
>
0 km/h and
<
20 km/h.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -89
Item
Detecting Condition
Possible cause
Monitoring
Period
• Continuous
Case 5
Enable
Conditions
• Vehicle
<
100 Km/h
- Difference of two wheel speeds at FL to
RL/RR to RR
>
1.7 m/s (6 km/h).
- Difference of two wheel speeds at FL to
FR/RL to RR
>
1.7 m/s + 1.1 m/s.
- Difference of two wheel speeds at FL to
RR/FR to RL
>
1.7 m/s + 2.2 m/s.
※
If at least one wheel is at 1.4 m/s or lower, a
wheel speed difference of adjoining wheels up to
3.3 m/s(or 3.3 m/s + 1.1 m/s) is permitted.
• Vehicle
>
100 Km/h
- Difference of two wheel speeds at FL to
RL/RR to RR
>
(6%
×
Vref).
- Difference of two wheel speeds at FL to FR/RL
to RR
>
(6%
×
Vref + 1.1 m/s).
- Difference of two wheel speeds at FL to RR/FR
to RL
>
(6%
×
Vref + 2.2 m/s).
• Detection filter time
- Response and detection filter time depend
on the amount of the speed difference and
additional conditions as shown below.
1)
18s - if fault threshold is exceeding
>
1.7 m/s resp.6%
2)
9s - if fault threshold is exceeding
>
3.3 m/s resp. 12%
3)
If any wheel shows strong deceleration the
fault detection filter time is not shorter than 18s.
4)
If spinning wheel is detected the fault detection
filter time is not shorter than 72s.
• Fault allocation
If the exact fault location can be determined
the wheel specific fault will be set. This is the
case if at the time of detection the faulty wheel
speed is at or below 1.4 m/s.
Otherwise a general wheel speed sensor
generic fauly is set.
Fail Safe
Refer to DTC C1200.
BR -90
BRAKE SYSTEM
MONITOR SCANTOOL DATA
E311F0BA
1.
Engine "ON".
2.
Connect scantool to Data Link Connector(DLC).
3.
Start and drive vehicle in gear and maintain vehicle speed at or above 50 km/h(31 mph)
4.
Monitor the "Wheel Speed Sensor" parameter on the Scantool.
Specification : Compare with another parameters related to wheel speed sensor. If it is the
same as another parameters, it is in normal condition.
Fig1
Fig2
SCMBR6543L
Fig 1) Test Condition : Drive vehicle at a speed of 50 km/h or more. (31 mph or more) Normal Data
Fig 2) Test Condition : Drive vehicle at a speed of 51 km/h or more. (31 mph or more) Normal Graph
Fig 3) Test Condition : Drive vehicle at a speed of 51 km/h or more. (31 mph or more) Abnormal Data
Fig 4) Test Condition : Drive vehicle at a speed of 51 km/h or more. (31 mph or more) Abnormal Graph
Fig3
Fig4
SCMBR6544L
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -91
5.
Is parameter displayed within specifications?
YES
▶
Fault is intermittent caused by poor connection in wheel speed sensor harness (FL), Thoroughly check connectors
for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair as necessary
and then go to "Verification Of Vehicle Repair" procedure.
NO
▶
Go to "Component Inspection" Procedure.
COMPONENT INSPECTION
ECF760AA
Refer to DTC C1201.
VERIFICATION OF VEHICLE REPAIR
E5C12FB8
After a repair, it is essential to verify that the fault has been corrected.
1.
Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
2.
Using a scantool, Clear DTC.
3.
Operate the vehicle within DTC Detecting Condition in General Information.(Start and drive vehicle in gear and main-
tain vehicle speed at or above 50 km/h (31 mph))
4.
Are any DTCs present ?
YES
▶
Go to the applicable troubleshooting procedure.
NO
▶
System performing to specification at this time.
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