Kia Sedona (2008 year). Instruction — part 15

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 10 km/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)

Case 1



Signal motor ring



Improper
installation of
wheel speed sensor



Abnormal Rotor
and wheel bearing



Inoperative Wheel
speed sensor



Inoperative HECU

Monitoring Period



Continuous

Enable Conditions



When short cut between
the wheel speed sensor
supply and the battery.

Fail Safe



Wheel speed sensor
signals are not reliable.

Case 2

DTC strategy



Signal motor ring

Monitoring Period



Continuous

Enable Conditions



The monitoring reports a
failure if the ABS target
slip is exceeded for a
time period > = 10 s at
one or more wheels.



If the driver brakes
or the velocity is
lower than 50 km/h
the detection time
is enlarged to 60 s.

Fail Safe



Reduced function of the
ESC system

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.

Fig. 39: Scan Tool Display - Vehicle Speed Sensor
Courtesy of KIA MOTORS AMERICA, INC.

5. 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. Go to "COMPONENT
INSPECTION" procedure.

NO



Check for improper installation of wheel speed sensor. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure.



Check for damage of rotor teeth or wheel bearing. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure.



Substitute with a known-good Wheel speed sensor and check for proper operation. If problem is
corrected, replace Wheel speed sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.



If OK, Go to "COMPONENT INSPECTION" Procedure.

COMPONENT INSPECTION

1. Ignition "OFF".

2. Engine "ON".

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

4. Does warning lamp remain On?

YES

2008 Kia Sedona

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

Microsoft

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

Page 58

© 2006 Mitchell Repair Information Company, LLC.



Substitute with a known-good HECU and check for proper operation. If problem is corrected,
replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO



Fault is intermittent caused by open or short of wheel speed sensor harness, inoperative wheel
speed sensor. Go to the applicable troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1200.

DTC C1235 PRESSURE SENSOR (PRIMARY) - ELECTRICAL

COMPONENT LOCATION

Fig. 40: Identifying HECU
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

The pressure sensor, installed in the HECU, sense the brake oil pressure to judge driver's brake intention when
ESC is operating. If pressure of master cylinder is applied to pressure sensor, the strain of the piezo element is
changed and then the resistance of bridge circuit is changed according to changed strain. Therefore this changed
resistance changes output voltage of bridge circuit and output voltage changes linearly. The sensor output is a
analog signal in proportion to supply voltage, and the HECU recognizes a pressure value according to signal
ratio about supply voltage.

DTC DESCRIPTION

Each unfiltered input signal voltage is monitored to be in the range of 4.7 V < input signal voltage < 5.3 V. A
failure is detected if the output signal value is out of specified range for more than 100 ms or pressure sensor
self test form is out of specification during self test.

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

Case 1

Monitoring Period



Continuous

Enable Conditions



A sensor supply failure is
detected if Sensor Supply
Voltage > 5.3 V or Sensor
Supply Voltage < 4.7 V
for t > = 60 ms.

Case 2

Monitoring Period



Continuous

Enable Conditions



A Fault is set if the DSO
signal is voltage of DSO >
4.7 V or voltage of DSO <
0.3V for a time t > = 100
ms.



DSO: original
pressure value.

Case 3

Monitoring Period



Continuous

Enable Conditions



A Fault is set if the DSI
signal is voltage of DSI >
4.7 V or voltage of DSI <
0.3V for a time t > = 100
ms.



DSI: inverted
pressure value.

Case 4

Monitoring Period



Continuous

Enable Conditions



A Fault is set if the
voltage of DSO + DSI >
5.5V or voltage of DSO +
DSI < 4.5V for a time t >=
100ms.



DSO: original
pressure value.



DSI: inverted
pressure value.

Monitoring Period



Once during Power Up



POS detects internal
sensor malfunctions
(sensor element,
amplification, etc.). The
POS is triggered if no low

2008 Kia Sedona

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

Microsoft

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

Page 60

© 2006 Mitchell Repair Information Company, LLC.