Kia Sedona (2008 year). Instruction — part 9

Fig. 26: Identifying Battery Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

The ABS ECU (Electronic Control Unit) checks the battery voltage to determine, as a safety issue, whether the
ABS system can operate normally or not. The normal battery voltage range is essential for controlling the ABS
system as intended.

DTC DESCRIPTION

The ABS ECU monitors battery voltage by reading the value of voltage. When the voltage is higher than the
expected normal value, this code is set, and the ABS/EBD/ESC functions are prohibited. If the voltage recovers,
to within normal operating ranges, then the controller returns to normal operation as well.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC strategy



Battery Voltage Monitoring



Poor connection in power
supply circuit (IGN+)



Inoperative Generator



Inoperative HECU

Monitoring Period



Continuous (Over voltage faults
will be always stored.)

Enable Conditions



When Vign is higher than 16.9
V.



If the voltage is recovered
to 16.6 V, the controller
returns to normal state.



The monitored supply
voltage is filtered and
limited to a rise time of 4
volts per second.



The ABS/EBD/ESC functions
are inhibited.

2008 Kia Sedona

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

Microsoft

Saturday, May 22, 2010 6:52:42 PM

Page 33

© 2006 Mitchell Repair Information Company, LLC.

MONITOR SCAN TOOL DATA

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

2. Engine "ON".

3. Monitor the "BATTERY VOLTAGE" parameter on the scan tool.

Specification: Approx. 14.5 ± 0.3 V (25°C)

Fig. 27: Scan Tool Display - Engine Speed
Courtesy of KIA MOTORS AMERICA, INC.

4. Is parameter displayed within specifications?

YES



Fault is intermittent caused by poor connection in power harness (IGN+) and/or HECU's connector
or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness,
poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as
necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO

Fail Safe



The proper function of
valves and return pump is
not guaranteed.



The ABS/EBD/ESC warning
lamps are activated.



The supply voltage to wheel
speed sensor is interrupted.

2008 Kia Sedona

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

Microsoft

Saturday, May 22, 2010 6:52:42 PM

Page 34

© 2006 Mitchell Repair Information Company, LLC.



Go to TERMINAL & CONNECTOR INSPECTION procedure.

TERMINAL & CONNECTOR INSPECTION

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals condition. Faults

can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,

deterioration, or damage.

3. Has a problem been found?

YES



Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO



Go to "GENERATOR OUTPUT VOLTAGE INSPECTION" procedure.

GENERATOR OUTPUT VOLTAGE INSPECTION

1. Engine "ON".

2. Measure voltage between the battery terminal (+) and the battery terminal (-).

Specification: Approx. 14.5 ± 0.3 V (25 °C)

Fig. 28: Measuring Voltage Between Battery Terminal (+) And Battery Terminal (-)
Courtesy of KIA MOTORS AMERICA, INC.

3. Is the measured voltage within specifications?

YES



Go to "POWER CIRCUIT INSPECTION" procedure.

NO

2008 Kia Sedona

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

Microsoft

Saturday, May 22, 2010 6:52:42 PM

Page 35

© 2006 Mitchell Repair Information Company, LLC.



Check for damaged harness and poor connection between generator and battery. If OK repair or
replace generator and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

POWER SUPPLY CIRCUIT INSPECTION

1. Engine "ON".

2. Measure voltage between the battery terminal (+) and terminal "28" of the HECU harness connector.

Specification: Approx. below 0.2 V

Fig. 29: Measuring Voltage Between Battery Terminal (+) And Terminal 28 Of HECU Harness
Connector
Courtesy of KIA MOTORS AMERICA, INC.

3. Is the measured voltage within specifications?

YES



Go to "GROUND CIRCUIT INSPECTION" procedure.

NO



Check for damaged harness and poor connection between the battery terminal (+) and terminal "28"
of the HEC Harness connector. 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 6:52:42 PM

Page 36

© 2006 Mitchell Repair Information Company, LLC.