Kia Sedona (2008 year). Instruction — part 10

Fig. 30: Measuring Resistance Between Terminal "4" Of 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

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 poor connection in power harness (IGN+), inoperative Generator
and/or inoperative HECU or was repaired and HECU memory was not cleared. Go to the applicable
troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR

After a repair, it is essential to verify that the fault has been corrected.

2008 Kia Sedona

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

Microsoft

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

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1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode

2. Using a scan tool, Clear DTC.

3. Operate the vehicle within DTC Detecting Condition in General Information

4. Are any DTCs present?

YES



Go to the applicable troubleshooting procedure.

NO



System performing to specification at this time.

DTC C1102 BATTERY VOLTAGE LOW

COMPONENT LOCATION

Refer to DTC C1101.

GENERAL DESCRIPTION

Refer to DTC C1101.

DTC DESCRIPTION

Refer to DTC C1101.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC strategy



Battery Voltage
Monitoring

Monitoring Period



Continuous (Under
voltage faults are only
entered in the EEPROM if
the vehicle speed is > 6
km/h.)



When Vign is lower than
9.6 V outside ABS/ESC
control.



When Vign is lower than
9.3 V inside ABS/ESC
control.

2008 Kia Sedona

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

Microsoft

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

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© 2006 Mitchell Repair Information Company, LLC.

MONITOR SCAN TOOL DATA

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

Case1 (Low voltage)

Enable Conditions



If IGN voltage is
recovered to 9.8 V,
the system recovers
to normal state.



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



Poor connection in
power supply
circuit (IGN+)



Inoperative HECU

Fail Safe



The ABS/ESC functions
are inhibited.



The ABS/ESC warning
lamps are activated.

Case2 (Under voltage)

Enable Conditions



When Vign is lower than
7.6 V.



If IGN voltage is
recovered to 7.8 V,
the system recovers
to normal state.



Under voltage due
to low voltage
glitches is detected
if unfiltered voltage
< or = 8.2 V for t >
or = 20 ms.



If the voltage is
recovered to 8.3 V
for t > 500 ms, the
system recovers to
normal state.



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

Fail Safe



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 6:52:42 PM

Page 39

© 2006 Mitchell Repair Information Company, LLC.

2. Engine "ON".

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

Specification: Approx. B+

Fig. 31: 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



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

2008 Kia Sedona

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

Microsoft

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

Page 40

© 2006 Mitchell Repair Information Company, LLC.