Kia Sedona (2008 year). Instruction — 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.