Kia Sedona (2008 year). Manual - 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

Page 57 

© 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

Page 59 

© 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.