Kia Sedona (2008 year). Instruction — part 11



Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO



Go to "POWER CIRCUIT INSPECTION" procedure.

POWER SUPPLY CIRCUIT INSPECTION

1. Engine "ON".

2. Measure voltage between the battery terminal (+) and terminal "28" of the HECU harness connector.

Specification: Approx. B+

Fig. 32: Measuring Voltage Between Battery Terminal (+) And Terminal "28" Of HECU Harness
Connector
Courtesy of KIA MOTORS AMERICA, INC.

3. Is the measured voltage within specifications?

YES



Go to "GROUND CIRCUIT INSPECTION" procedure.

NO



Check for damaged harness and poor connection between the battery terminal (+) and terminal "28"
of the HECU harness connector. Check for open or blown 10 A ABS fuse referring to "Circuit
Diagram". Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR"
procedure.

GROUND CIRCUIT INSPECTION

Refer to DTC C1101.

COMPONENT INSPECTION

2008 Kia Sedona

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

Microsoft

Saturday, May 22, 2010 6:52:42 PM

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© 2006 Mitchell Repair Information Company, LLC.

Refer to DTC C1101.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101.

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

Fig. 33: Wheel Speed Sensor Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

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 reference 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
characteristic. 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

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.

DTC DETECTING CONDITION

2008 Kia Sedona

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

Microsoft

Saturday, May 22, 2010 6:52:42 PM

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© 2006 Mitchell Repair Information Company, LLC.

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring



Open or short of
Wheel speed
sensor circuit



Inoperative
Wheel speed
sensor



Inoperative
HECU

Case1

Monitoring Period



Once after power up.

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.

Case2

Monitoring Period



Continuous

Enable Conditions



When the sensor current levels
are out of permissible range
(LOW: 7 mA, HIGH: 14 mA)
for 200 ms.



Sensor failure outside of the
ABS control cycle

1. Only one wheel failure:

Only the ABS/ESC
functions are inhibited.
The ABS/ESC warning
lamps are activated and
the EBD warning lamp is
not activated.

2. Two wheels failure: Only

the ABS/ESC functions
are inhibited. The
ABS/ESC warning lamps
are activated and the
EBD warning lamp is not
activated.

3. More than 3 wheels

failure: System down.
The ABS/EBD/ESC
functions are inhibited.
The ABS/EBD/ESC
warning lamps are
activated.



Sensor failure inside the ABS
control cycle

1. One front wheel failure:

Inhibit the ABS/ESC
control. Pressure is

2008 Kia Sedona

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

Microsoft

Saturday, May 22, 2010 6:52:42 PM

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© 2006 Mitchell Repair Information Company, LLC.

MONITOR SCAN TOOL DATA

1. Engine "ON".

2. Connect scan tool to Data Link Connector (DLC).

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

4. Monitor the "Wheel speed sensor" parameter on the scan tool.

Specification: Approx. 10 km/h or more (6 mph or more)

Fail Safe

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

2. Two wheels failure:

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

3. More than 3 wheels

failure: System down.
The ABS/EBD/ESC
functions are inhibited.
The ABS/EBD/ESC
warning lamps are
activated.

2008 Kia Sedona

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

Microsoft

Saturday, May 22, 2010 6:52:42 PM

Page 44

© 2006 Mitchell Repair Information Company, LLC.