Kia Sedona (2008 year). Manual - part 27

COMPONENT INSPECTION 

1. Ignition "OFF".  

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 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 C2112 VALVE RELAY ERROR 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

The HECU supplies battery power to all solenoid valves with a valve relay which is controlled by the Electronic 
Control UNIT (ECU). The valve relay and all solenoid valves are installed inside the HECU (Hydraulic and 
Electronic Control Unit). 

DTC DESCRIPTION 

The HECU monitors voltage of the valve relay to check if the HECU can perform ABS control normally. When 
the valve relay is switched to ON, the HECU will set this code if the solenoid drive voltage is below permissible 
voltage ranges for a period of time. When the valve relay is switched to OFF, the HECU sets this code if the 
solenoid drive voltage is over the permissible voltage range for a period of time. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring  

Monitoring Period



Once during startup.  

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 105 

© 2006 Mitchell Repair Information Company, LLC. 

TERMINAL & CONNECTOR INSPECTION 

Refer to DTC C1102. 

POWER SUPPLY CIRCUIT INSPECTION 

1. Ignition "OFF".  

2. Disconnect HECU connector.  

3. Ignition "ON".  

Case 1

Enable Conditions



Watchdog and valve relay 
function is tested during 
startup. A failure is 
detected if the valve 
relay/Enable remains in off 
position when it is turned 
on and vice versa. Reason 
could be short to GND or 
UZ, interrupted lines or a 
inoperative output stage 
etc.  



Open or short in 
power supply 
circuit (IGN+)  

Case 2

Monitoring Period



Continuous  

Enable Conditions



A Fault is detected if valve 
relay voltage < 0.8 * 
battery voltage for a time 
500 ms.  

Case 3

Monitoring Period



Continuous  

Enable Conditions



If valve relay malfunction 
and supply solenoid valve 
short to battery or supply 
solenoid valve and 
medium or high ohmic 
short of valve relay (or a 
valve) to valve relay 
voltage, solenoid valve 
voltage or GND are 
detected.  

Fail Safe



No valve actuation 
possible.  



The ABS/EBD/ESC 
functions are inhibited.  



The ABS/EBD/ESC 
warning lamps are 
activated.  

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 106 

© 2006 Mitchell Repair Information Company, LLC. 

4. Measure voltage between terminal "3" of the HECU harness connector and chassis ground. 

Specification: Approx. B+ 

Fig. 65: Measuring Voltage Between Terminal HECU Harness Connector And Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Is the measured voltage within specifications? 

YES  



Go to "GROUND CIRCUIT INSPECTION" procedure.  

NO  



Check for damaged harness and open or short to GND between the battery terminal (+) and 
terminal "3" of the HECU harness connector. Check for open or blown 20 A ABS fuse referring to 
"Circuit Diagram". Repair as necessary and then go to "VERIFICATION OF VEHICLE 
REPAIR" procedure.  

GROUND CIRCUIT INSPECTION 

1. Ignition "OFF".  

2. Disconnect HECU connector.  

3. Measure resistance between terminal "4" of the HECU harness connector and chassis ground. 

Specification: Approx. below 1 ohms

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 107 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 66: Measuring Resistance Between Terminal HECU Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

YES  



Go to "COMPONENT INSPECTION" procedure.  

NO  



Check for damaged harness and poor connection between terminal "4" of the HECU harness 
connector and chassis ground. Repair as necessary and then go to "VERIFICATION OF 
VEHICLE REPAIR" procedure.  

COMPONENT INSPECTION 

Refer to DTC C1101. 

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

C2308 FL INLET VALVE MALFUNCTION; DTC C2316 FR INLET VALVE MALFUNCTION; DTC 
C2324 RL INLET VALVE MALFUNCTION; DTC C2332 RR INLET VALVE MALFUNCTION 

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 
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 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 108 

© 2006 Mitchell Repair Information Company, LLC.