Kia Sedona (2008 year). Manual - part 30

Case1 (Stop monitor)

Fail Safe



The return pump does not 
work correct.  



The ABS/ESC functions 
are inhibited, reduced 
function of the EBD 
system.  



The ABS/EBD/ESC 
warning lamps are 
activated.  



Open or short of 
power supply 
circuit (ABS1)  



Inoperative HECU 

Case2 (Pump run 

monitor)

Monitoring Period



The monitor is active if 
the pump is switched on  

Enable Conditions



A failure is detected if the 
pump motor voltage < 
(battery voltage - 4.0 V) 
for more than 100ms.  

Fail Safe



Pressure decrease (outlet 
valve) is no longer 
possible.  



The ABS/ESC functions 
are inhibited, reduced 
function of the EBD 
system.  



The ABS/EBD/ESC 
warning lamps are 
activated.  

Monitoring Period



Monitor is always active 
in the transition "pump on 
--> pump off"  

Enable Conditions



After the end of the 
actuation of the motor 
relay has, the pump motor 
is still in motion and is 
generating a Voltage 
during it's slowdown. The 
generated UM is 
monitored for a certain 
time on high level. The 
time depends on the 
supply voltage and is in 
the range of t = 30 ms to t 
= 125 ms. If the slow 
down condition isn't met, 
the pump is activated 
again (see actuation times 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 117 

© 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.

Case3 (Pump 

slowdown monitor)

below) and the slowdown 
time is measured again. 
This is repeated for 
maximum n = 3 times. If, 
after the last pump 
activation, the pump 
motor slowdown time is 
still to short, a failure is 
detected. Actuation times: 

1st actuation: 200 ms 

2nd actuation: 1000 ms 

3rd actuation: 3000 ms 

Fail Safe



Pressure decrease (outlet 
valve) is no longer 
possible.  



The ABS/ESC functions 
are inhibited, reduced 
function of the EBD 
system.  



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 118 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 70: 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.  

TERMINAL & CONNECTOR INSPECTION 

Refer to DTC C1102. 

POWER SUPPLY CIRCUIT INSPECTION 

1. Ignition "OFF".  

2. Disconnect HECU connector.  

3. Ignition "ON".  

4. Measure voltage between terminal "2" of the HECU harness connector and chassis ground. 

Specification: Approx. B+ 

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 119 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 71: 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 "2" of the HECU harness connector. Check for open or blown 40A 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 "1" of the HECU harness connector and chassis ground. 

Specification: Approx. below 1 ohms 

Fig. 72: Measuring Resistance Between Terminal HECU Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.

 

2008 Kia Sedona 

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

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 120 

© 2006 Mitchell Repair Information Company, LLC.