Kia Sedona (2008 year). Instruction — part 16

Case 5

Enable Conditions

voltage is present and
supply voltage is switched
on. The test phase is
divided in two 60 ms
parts. DSO signal must be
< 0.5 V for 30 ms. In
phase 2 DSO signal must
be between 1.9V and 3.1V
for also 30 ms then the
POS Test is passed. The
test phase is divided in
two 60 ms parts. DSO and
DSI signal must be < 0.5
V for 30 ms. In phase 2
DSO and DSI signal must
be between 1.9 V and 3.1
V for also 30 ms then the
POS Test is passed. A
fault is set if POS does not
satisfy the above
conditions



POS: Power on self-
test.

pressure sensor
circuit



Inoperative
pressure sensor



Inoperative HECU

Fail Safe



No Pressure Signal
available.



Sensor failure outside the
ABS control cycle



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



Sensor failure inside the
ABS control cycle



Inhibit the ESC
control, allow the
EBD. The ESC
warning lamps are
activated. After the
control, the ABS
functions are
inhibited. The ABS

2008 Kia Sedona

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

Microsoft

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

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MONITOR SCAN TOOL DATA

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

2. Ignition "ON" & Engine "ON".

3. Press the brake pedal.

4. Monitor the "Pressure sensor" parameter on the scan tool.

Specification: Approx. 60 bar - 150 bar (There are difference in displayed parameter according to braking
force)

Fig. 41: Scan Tool Display - EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.

5. Whenever brake pedal is pushed down, is the pressure sensor's scan tool data changed?

YES



Fault is caused by having been repaired and HECU memory was not cleared. Clear the DTC and
then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO



Go to "COMPONENT INSPECTION" procedure.

COMPONENT INSPECTION

1. Ignition "OFF".

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 62

© 2006 Mitchell Repair Information Company, LLC.

2. Engine "ON".

3. Does warning lamp remain On?

YES



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 C1101.

DTC C1237 PRESSURE SENSOR - OTHER

COMPONENT LOCATION

Refer to DTC C1235.

GENERAL DESCRIPTION

Refer to DTC C1235.

DTC DESCRIPTION

With the driver torque demand and the lateral acceleration a driver braking demand is calculated. Unless the
pump motor is operating or there is a brake signal, The offset compensation is executed. A failure is detected if
offset value exceeded ± 15 bar.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

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.



The pressure sensor-offset

2008 Kia Sedona

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

Microsoft

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

Page 63

© 2006 Mitchell Repair Information Company, LLC.

MONITOR SCAN TOOL DATA

Refer to DTC C1235.

COMPONENT INSPECTION

Refer to DTC C1235.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101.

DTC C1260 STEERING ANGLE SENSOR - SIGNAL

COMPONENT LOCATION

Fig. 42: Identifying Steering Angle Sensor-Signal Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

Enable Conditions

value must be in the range of
± 15 bar. A failure is detected
if this range is exceeded.



Open or short of pressure
sensor circuit



Inoperative pressure sensor



Inoperative HECU

Fail Safe



Reduced function caused by
inoperative pressure sensor
signal.



Sensor failure outside the
ABS control cycle



Only the ABS/ESC
functions are inhibited,
allow the EBD.



The ABS/ESC warning lamps
are activated and the EBD

2008 Kia Sedona

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

Microsoft

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

Page 64

© 2006 Mitchell Repair Information Company, LLC.