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Hyundai Santa Fe (2006 year). Manual - part 226

BR -76

BRAKE SYSTEM

POWER CIRCUIT INSPECTION

E7186C63

Ignition "OFF".

Disconnect HECU connector.

Ignition "ON" & Engine "OFF".

Measure voltage between terminal "28" of the HECU harness connector and chassis ground.

Specification : Approx. B+

<C281>

<ABS>
18. IGNITION(+)

<ESP>
28. IGNITION(+)

5 6

8 9 10 11 12 13 14 15 16

20 21

26 27 28 29 30 31 32 33

37 38

* * * *

* * *

* *

SCMBR6537L

Is the measured voltage within specifications?

YES

▶

Go to "Ground Circuit Inspection" procedure.

▶

Check for damaged harness and poor connection between the battery terminal(+) and terminal "28" of the HECU

harness connector. Check for open or blown 10A ABS fuse referring to "Circuit Diagram". Repair as necessary and
then go to "Verification Of Vehicle Repair" procedure.

GROUND CIRCUIT INSPECTION

ED5D60D9

Refer to DTC C1101.

VERIFICATION OF VEHICLE REPAIR

EC8DB117

Refer to DTC C1101.

ABS (ANTI-LOCK BRAKE SYSTEM)

BR -77

DTC C1200 FL WHEEL SPEED SENSOR-OPEN/SHORT
DTC C1203 FR WHEEL SPEED SENSOR-OPEN/SHORT
DTC C1206 RL WHEEL SPEED SENSOR-OPEN/SHORT
DTC C1209 RR WHEEL SPEED SENSOR-OPEN/SHORT

COMPONENT LOCATION

EF3C984D

SCMBR6547D

GENERAL DESCRIPTION

EF598248

The wheel speed sensor is the essential component the ABS ECU uses to calculate vehicle speed and to determine
whether wheel lock occurs. For example, rear wheel speed signal is used as a referecnce value, for vehicle speed, in front
wheel drive vehicles, and if a difference between front and rear wheel speed occurs, then ABS control is performed. Wheel
speed sensor is active hall-sensor type and good at temperature and noise chariteristic. Digital waveform is produced as
tone wheel rotate according as hall sensor principle. Frequency of duty waveform is changed in proportion to rotation of
tone wheel and HECU calculate vehicle speed by this frequency.

DTC DESCRIPTION

E3A8CED9

The ABS ECU monitors the wheel speed sensor circuit continuously. A direct current is supplied in the wheel-speed
sensor by a power source in the input amplifier of the control unit. If the WSS circuit is broken, in that case a fault is
detected by detecting abnormal input current. HECU cuts off the voltage supply to wheel sensor channel which had a
fault and prevent vehicle’s damage due to super heated harness. If one or more defects has detected, DTC code of
defected wheel will be stored. Mutual short between sensors is detected by executing self diagnosis successively at
corresponding wheel when ignition ON. Warning lamp is turned OFF unless additional faults are detected when the IG
KEY is turned ON again.

BR -78

BRAKE SYSTEM

DTC DETECTING CONDITION

EA7455B1

Item

Detecting Condition

Possible cause

DTC Strategy

• Voltage monitoring

Monitoring

Period

• Once after power up.

Case1

Enable

Conditions

• Shorts between WSS lines and shorts to UZ can

be detected by switching single WSS channels
in sequence. If there is an error after end of
test, a failure is recognized.

Monitoring

Period

• Continuous

Case2

Enable

Conditions

• When the sensor current levels are out

of permissible range(LOW : 7 mA, HIGH
: 14 mA) for 200 ms.

Fail Safe

• Sensor failure outside of the ABS control cycle

Only one wheel failure : Only the ABS/ESP
functions are inhibited. The ABS/ESC
warning lamps are activated and the EBD
warning lamp is not activated.

Two wheels failure : Only the ABS/ESP
functions are inhibited. The ABS/ESP
warning lamps are activated and the EBD
warning lamp is not activated.

More than 3 wheels failure :System down. The
ABS/EBD/ESP functions are inhibited. The
ABS/EBD/ESP warning lamps are activated.

• Sensor failure inside the ABS control cycle

One front wheel failure : Inhibit the ABS/ESP
control. Pressure is increased on a front
wheel, Pressure is decreased on a rear wheel.
After the ABS/ESP control, the ABS/ESP
functions are inhibited. The ABS/ESP
warning lamps are activated and the EBD
warning lamp is not activated.

Two wheels failure : Inhibit the ABS/ESP
control. Pressure is increased on a front
wheel, Pressure is decreased on a rear wheel.
After the ABS/ESP control, the ABS/ESP
functions are inhibited. The ABS/ESP
warning lamps are activated and the EBD
warning lamp is not activated.

More than 3 wheels failure : System down. The
ABS/EBD/ESP functions are inhibited. The
ABS/EBD/ESP warning lamps are activated.

• Open or short of Wheel

speed sensor circuit

• Inoperative Wheel speed

sensor

• Inoperative HECU

ABS (ANTI-LOCK BRAKE SYSTEM)

BR -79

MONITOR SCANTOOL DATA

E81CC041

Engine "ON".

Connect scantool to Data Link Connector(DLC).

Start and drive vehicle in gear and maintain vehicle speed at or above 10 km/h(6 mph)

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.

Fig 1) Test Condition : Test Condition : Drive vehicle at a speed of 10km/h or more. (6mph or more) Normal Data

Fig 2) Test Condition : Drive vehicle at a speed of 10km/h or more. (6mph or more) Abnormal Data (Open)

Fig1

Fig2

SCMBR6538L

Is parameter displayed within specifications?

YES

▶

Fault is intermittent caused by poor connection in wheel speed sensor harness and/or HECU’s connector or was

repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification Of
Vehicle Repair" procedure.

▶

Go to "W/Harness Inspection" procedure.

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