Kia Sedona (2008 year). Manual - 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

Page 61 

© 2006 Mitchell Repair Information Company, LLC. 

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.