Kia Sedona (2008 year). Manual - part 29

Fig. 68: 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 

Refer to DTC C2308. 

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C2366 TCS VALVE PRIMARY (USV1) ERROR; DTC C2370 TCS VALVE SECONDARY (USV2)
ERROR; DTC C2372 ESC VALVE 1 (HSV1) ERROR; DTC C2374 ESC VALVE 2 (HSV2) ERROR 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

The HECU is composed of an ECU (Electronic Control Unit) and an HCU (Hydraulic Control Unit), so the 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 113 

© 2006 Mitchell Repair Information Company, LLC. 

HECU hardware includes all solenoid valves inside the unit as well as the ECU. Solenoid valves are switched to 
ON, OFF by HECU when the ABS is activated. Solenoid valves function is to increase, decrease or maintain 
the hydraulic pressure supplied to a brake caliper. 

DTC DESCRIPTION 

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 OTC 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  



Inoperative HECU 

Case 1

Monitoring Period



Once after ignition on at 
standstill if the BLS is off  



At vehicle speed > or = 15 
km/h if the BLS is on.  

Enable Conditions



The test actuates all valves 
in series to detect shorts or 
shunts between the valve 
lines. Faults are detected if 
there is an error during the 
test.  

Case 2

Monitoring Period



The drift test executes only 
once during an ignition 
Cycle. The test is triggered 
if the following conditions 
are fulfilled: 10 min 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.  



The drift test is executed 
only once during an ignition 
Cycle. If it detects partly 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 114 

© 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. 69: Scan Tool Display - Actuation Test 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Does a inlet valve operate normally? 

YES  

Enable Conditions

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 
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 115 

© 2006 Mitchell Repair Information Company, LLC. 



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 

Refer to DTC C2308. 

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C2402 MOTOR-ELECTRICAL 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

The HECU supplies battery power to the electric motor with a motor relay which is controlled by the Electronic 
Control Unit (ECU). The electric motor pump supplies hydraulic pressure to all wheel brake calipers by 
operating the piston inside the pump. 

DTC DESCRIPTION 

The HECU monitors the pump motor relay or fuse open, open or short in motor or motor lock and then sets this 
code if a malfunction is detected. Warning lamp is turned OFF unless additional faults are detected when the IG 
KEY is turned ON again, and wheel speed is more than 15 km/h. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring  

Monitoring Period



Stop monitor is active if 
the pump is off i.e. not 
actuation and no 
Slowdown.  

Enable Conditions



A failure is detected if the 
pump motor voltage > 2.0 
V for more than 1 s.  

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 116 

© 2006 Mitchell Repair Information Company, LLC.