Kia Sedona (2008 year). Manual - part 28

The HECU monitors the operation of the valves by checking the drive circuit of the solenoid valves, and then 
sets this code when the unexpected drive voltage is detected. For example, the HECU sets the DTC if the 
electrical feedback signal does not match the actuation signal for the corresponding valve. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring  

Case 1

Monitoring Period



Continuous  

Enable Conditions



The electrical feedback 
signal does not match the 
actuation signal for the 
corresponding valve for 
more than 30 ms. 



Current controlled 
valves and under 
voltage conditions: 
detection time is 80 
ms  

Case 2

Monitoring Period



Immediately after power on 



every 20 s 



The Test is canceled 
if any control, valve 
actuation takes place 
or if the Vehicle is in 
motion and the BLS is 
on.  

Enable Conditions



A Fault is found if UVR is 
not within 0.1*battery 
voltage < valve relay 
voltage < 0.8*battery 
voltage  



A Fault is found if valve 
relay voltage > or = 
0.2*battery voltage. 



After that all valves 
are switched on 
sequential, valve relay 
voltage and valve 
feedback is measured. 

Monitoring Period



The Valve and Pump motor 
Test is performed once after 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

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Case 3

ignition on if vehicle speed 
is > = 15 km/h.  



Inoperative HECU 

Enable Conditions



The valve and pump motor 
test detects electrical 
actuation malfunction of 
ABS valves. The test 
actuates all valves in series 
(to detect short cuts or 
shunts between the valve 
lines). Faults are detected if 
there is an error during the 
test.  

Case 4

Monitoring Period



The drift test executes only 
once during an ignition 
Cycle. The test is triggered 
if the following conditions 
are fulfilled: 10min after 
power up or end of control 

1. No BLS is applied  

2. Brake pressure is < 10 

bar  

3. Vehicle speed > 15 

km/h  

4. Vehicle acceleration > 

0.5 m/s

2

  

5. Supply voltage > 11 

volts.  

Enable Conditions



The drift test is executed 
only once during an ignition 
Cycle. If it detects partly 
shorted valve coils, almost 
inoperative coils or 
malfunction of the valve 
driver, a failure is 
recognized.  

Fail Safe



Valve cannot be actuated or 
valve is incorrectly actuated. 
This may result in locked 
wheels or wheels without 
pressure.  



ABS/EBD/ESC function is 
prohibited.  



ABS/EBD/ESC warning 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 110 

© 2006 Mitchell Repair Information Company, LLC. 

MONITOR ACTUATION TEST 

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

2. Ignition "ON" & Engine "OFF".  

3. Select the "Actuation Test" mode on the scan tool.  

4. Inspect operating status of inlet valve with Actuation Test. 

Specification: It's normal if operating sound is heard. 

Fig. 67: Scan Tool Display - Actuation Test 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Does a inlet valve operate normally? 

YES  



Fault is intermittent caused by inoperative valve or was repaired and HECU memory was not 
cleared. Go to the applicable troubleshooting procedure.  

NO  



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 15 km/h(9 mph).  

lamp is turned ON.  

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 111 

© 2006 Mitchell Repair Information Company, LLC. 

4. 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 inoperative HECU or was repaired and HECU memory was not 
cleared. Go to the applicable troubleshooting procedure.  

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C2312 FL OUTLET VALVE MALFUNCTION; DTC C2320 FR OUTLET VALVE 
MALFUNCTION; DTC C2328 RL OUTLET VALVE MALFUNCTION; DTC C2336 RR OUTLET 
VALVE MALFUNCTION 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

Refer to DTC C2308. 

DTC DESCRIPTION 

Refer to DTC C2308. 

DTC DETECTING CONDITION 

Refer to DTC C2308. 

MONITOR ACTUATION TEST 

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

2. Ignition "ON" & Engine "OFF".  

3. Select the "Actuation Test" mode on the scan tool.  

4. Inspect operating status of inlet valve with Actuation Test. 

Specification: It' s normal if operating sound is heard.

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 112 

© 2006 Mitchell Repair Information Company, LLC.