Fig. 1: Identifying ABS (Anti-Lock Brake System) Components
Courtesy of KIA MOTORS AMERICA, INC.
DESCRIPTION
This specification applies to HCU (Hydraulic Control Unit) and ECU (Electronic Control Unit) of the HECU
(Hydraulic and Electronic Control Unit).
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
This unit has the functions as follows.
Input of signal from Pressure sensor, Steering angle sensor, Yaw & Lateral G sensor, the wheel speed
sensors attached to each wheel.
Control of braking force/traction force/yaw moment.
Failsafe function.
Self-diagnosis function.
Interface with the external diagnosis tester.
Installation position: engine compartment
Brake tube length from master cylinder port to HECU inlet port should be max. 1 m
The position should not be close to the engine block and not lower than the wheel.
OPERATION
The ECU shall be put into operation by switching on the operating voltage (IGN).
On completion of the initialization phase, the ECU shall be ready for operation.
In the operating condition, the ECU shall be ready, within the specified limits (voltage and temperature), to
rocess the signals offered by the various sensors and switches in accordance with the control algorithm defined
by the software and to control the hydraulic and electrical actuators.
WHEEL SENSOR SIGNAL PROCESSING
The ECU shall receive wheel speed signal from the four active wheel sensors.
The wheel signals are converted to voltage signal by the signal conditioning circuit after receiving current signal
from active wheel sensors and given as input to the MCU.
SOLENOID VALVE CONTROL
When one side of the valve coil is connected to the positive voltage that is provided through the valve relay and
the other side is connected to the ground by the semiconductor circuit, the solenoid valve goes into operation.
The electrical function of the coils are always monitored by the valve test pulse under normal operation
conditions.
VOLTAGE LIMITS
Overvoltage
When overvoltage is detected (above 16.8V), the ECU switches off the valve relay and shuts down the
system.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
When voltage is returned to operating range, the system goes back to the normal condition after the
initialization phase.
Undervoltage
In the event of undervoltage (below 9.3V), ABS control shall be inhibited and the warning lamp shall be
turned on.
When voltage is returned to operating range, the warning lamp is switched off and ECU returns to normal
operating mode.
PUMP MOTOR CHECKING
The ECU performs a pump motor test at a speed of 15km/h once after IGN is switched on.
DIAGNOSTIC INTERFACE
Failures detected by the ECU are encoded on the ECU, stored in a EEPROM and read out by diagnostic
equipment when the ignition switch is turned on.
The diagnosis interface can also be used for testing the ECU during production of the ECU and for actuating the
HCU (Air-bleeding line or Roll and Brake Test line).
WARNING LAMP MODULE
Fig. 2: Identifying Warning Lamp Module
Courtesy of KIA MOTORS AMERICA, INC.
1. ABS WARNING LAMP MODULE
The active ABS warning lamp module indicates the self-test and failure status of the ABS. The ABS
warning lamp shall be on:
During the initialization phase after IGN ON (continuously 3 seconds).
In the event of inhibition of ABS functions b
failure.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
During diagnostic mode.
When the ECU Connector is separated from ECU.
2. PARKING/EBD WARNING LAMP MODULE
The active EBD warning lamp module indicates the self-test and failure status of the EBD. However, in
case the Parking Brake Switch is turned on, the EBD warning lamp is always turned on regardless of
EBD functions. The EBD warning lamp shall be on:
During the initialization phase after IGN ON (continuously 3 seconds).
When the Parking Brake Switch is ON or brake fluid level is low.
When the EBD function is out of order.
During diagnostic mode.
When the ECU Connector is separated from ECU.
ABS CONTROL
1. NORMAL BRAKING without ABS
OPERATION CHART
Inlet valve
(EV)
OperationOpenCloseOFF
Outlet valve
(AV)
Pump motor
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 3: ABS Control Circuit Diagram - Normal Braking Without ABS
Courtesy of KIA MOTORS AMERICA, INC.
2. DECREASE MODE
OPERATION CHART
Inlet valve (EV)Outlet valve (AV)Pump motor
OperationCloseOpenON (Motor speed control)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 4: ABS Control Circuit Diagram - Decrease Mode
Courtesy of KIA MOTORS AMERICA, INC.
3. HOLD MODE
OPERATION CHART
Inlet valve
(EV)
Outlet valve
(AV)
Pump motor
OperationCloseCloseOFF
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 5: ABS Control Circuit Diagram - Hold Mode
Courtesy of KIA MOTORS AMERICA, INC.
4. INCREASE MODE
OPERATION CHART
Inlet valve
(EV)
Outlet valve
(AV)
OperationOpenCloseOFF
Pump motor
Page 8
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 6: ABS Control Circuit Diagram - Increase Mode
Courtesy of KIA MOTORS AMERICA, INC.
ABS CIRCUIT DIAGRAM
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 7: ABS Circuit Diagram (1 Of 2)
Courtesy of KIA MOTORS AMERICA, INC.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 8: ABS Circuit Diagram (2 Of 2)
Courtesy of KIA MOTORS AMERICA, INC.
ECU CONNECTOR
INPUT/OUTPUT (ABS)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 9: Identifying ECU Connector Terminals
Courtesy of KIA MOTORS AMERICA, INC.
ECU CONNECTOR TERMINALS REFERENCE CHART
Wire No.Designation
1Ground for
20-39 A10 A10
Current
recirculation pump
Ground for
4
solenoid valves
5-15 A2.5 A10
and ECU
2Voltage supply for
20-39 A10 A10200
pump motor
3Voltage supply for
5-15 A2 A10200
solenoid valves
18Voltage for hybrid
1 A500 mA60200
ECU
5,10,17,19
signal wheel speed
sensor FL, FR, RL,
6 mA16 mA250200 to ground
RR
16,9,6,8
Voltage supply for
the active wheel
speed sensor FL,
11Valve relay stateVALVE RLY12MotorMOTOR13Front Left valve (IN)FL INLET14Front Right valve (IN)FR INLET15Rear Left valve (IN)RL INLET16Rear Right valve (IN)RR INLET17Front Left valve (OUT)FL OUTLET18Front Right valve (OUT) FR OUTLET19Rear Left valve (OUT)RL OUTLET20Rear Right valve (OUT)RR OUTLET-
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Fig. 10: Standard Flow Of Diagnostic Troubleshooting Chart
Courtesy of KIA MOTORS AMERICA, INC.
NOTES WITH REGARD TO DIAGNOSIS
The phenomena listed in the following table are not abnormal.
TROUBLESHOOTING REFERENCE CHART
PhenomenonExplanation
System check soundWhen starting the engine, a thudding sound can
sometimes be heard coming from inside the engine
compartment. This is because the system operation
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
check is being performed.
ABS operation sound
ABS operation (Long braking distance)For road surfaces such as snow-covered and gravel
Diagnosis detection conditions can vary depending on the diagnosis code. When checking the trouble
symptom after the diagnosis code has been erased, ensure that the requirements listed in "Comment" are
met.
1. Sound of the motor inside the ABS hydraulic
unit operation (whine).
2. Sound is generated along with vibration of the
brake pedal (scraping).
3. When ABS operates, sound is generated from
the vehicle chassis due to repeated brake
application and release (Thump: suspension;
squeak: tires)
roads, the braking distance for vehicles with ABS
can sometimes be longer than that for other
vehicles. Accordingly, advise the customer to drive
safely on such roads by lowering the vehicle speed.
SCAN TOOL CHECK
1. Turn the ignition switch OFF.
2. Connector the Scan tool to the 16P data link connector located the driver's side kick panel.
Fig. 11: Connecting HI
Courtesy of KIA MOTORS AMERICA, INC.
-Scan Pro Connector To Data Link Connector
3. Turn the ignition switch ON.
4. Check for DTC using the Scan tool
5. After completion trouble of the repair or correction of the problem, erase the stored fault codes using the
scan tool.
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ABS CHECK SHEET
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 12: ABS Check Sheet
Courtesy of KIA MOTORS AMERICA, INC.
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
roblem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
PROBLEM SYMPTOMS TABLE
SymptomSuspect Area
ABS does not operate.Only when 1. -4. are all normal and the problem is still occurring,
replace the HECU.
1. Check the DTC reconfirming that the system is operating to
specifications.
2. Power source circuit.
3. Speed sensor circuit.
4. Check the hydraulic circuit for leakage.
ABS does not operate
intermittently.
Only when 1. -4. are all normal and the problem is still occurring,
replace the ABS actuator assembly.
1. Check the DTC reconfirming that the system is operating to
specifications.
Communication with Scan tool is
not possible.
(Communication with any system
is not possible)
Communication with Scan tool is
not possible.
(Communication with ABS only
is not possible)
When ignition key is turned ON
(engine OFF), the ABS warning
lamp does not light up.
Even after the engine is started,
the ABS warning lamp remains
ON.
CAUTION: During ABS operation, the brake pedal may vibrate or may not be able to
be depressed. Such phenomena are due to intermittent changes in
hydraulic pressure inside the brake line to prevent the wheels from locking
and Is not an abnormality.
2. Wheel speed sensor circuit.
3. Stop lamp switch circuit.
4. Check the hydraulic circuit for leakage.
1. Power source circuit
2. Diagnosis line
1. Power source circuit
2. Diagnosis line
3. HECU
1. ABS warning lamp circuit
2. HECU
1. ABS warning lamp circuit
2. HECU
ABS DOES NOT OPERATE
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Brake operation varies depending on driving
conditions and road surface conditions, so diagnosis
can be difficult. However if a normal DTC is
displayed, check the following probable cause.
When the problem is still occurring, replace the
Inoperative power source circuit
Inoperative wheel speed sensor circuit
Inoperative hydraulic circuit for leakage
Inoperative HECU
ABS control module.
INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the Scan Tool with the data link connector and turn the ignition switch ON.
2. Verify that the system is operating to specifications. Is the system operating to specifications?
NO
Check the power source circuit.
YES
Erase the DTC and recheck using Scan Tool.
CHECK THE POWER SOURCE CIRCUIT.
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 18 of the ABS control module
harness side connector and body ground.
Specification: approximately B+
Is the voltage within specification?
YES
Check the ground circuit.
NO
Check the harness or connector between the fuse (10A) in the engine compartment junction block
and the ABS control module. Repair if necessary.
Page 18
Fig. 13: Checking Harness Or Connector Between Fuse Engine Compartment Junction Block And
ABS Control Module
Courtesy of KIA MOTORS AMERICA, INC.
CHECK THE GROUND CIRCUIT.
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 1,4 of the ABS control module harness side connector and ground
point.
Is there continuity?
YES
Check the wheel speed sensor circuit.
NO
Repair an open in the wire and ground point.
Fig. 14: Checking Continuity Between Terminals ABS Control Module Harness Side Connector
And Ground Point
Courtesy of KIA MOTORS AMERICA, INC.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures .
Is the system operating to specifications?
YES
Check the hydraulic circuit for leakage.
NO
Repair or replace the wheel speed sensor.
CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines .
Inspect leakage of the hydraulic lines.
Is the system operating to specifications?
YES
The problem is still occurring, replace the ABS control module.
NO
Replace the leaking hydraulic lines.
ABS DOES NOT OPERATE (INTERMITTENTLY)
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
Brake operation varies depending on driving
conditions and road surface conditions, so diagnosis
can be difficult. However if a normal DTC is
displayed, check the following probable cause.
When the problem is still occurring, replace the
Inoperative power source circuit
Inoperative wheel speed sensor circuit
Inoperative hydraulic circuit for leakage
Inoperative HECU
ABS control module.
INSPECTION PROCEDURES
DTC INSPECTION
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
1. Connect the Scan Tool with the data link connector and turn the ignition switch ON.
2. Verify that the system is operating to specifications. Is the system operating to specifications?
NO
Check the wheel speed sensor circuit.
YES
Erase the DTC and recheck using Scan Tool.
CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures .
Is the system operating to specifications?
YES
Check the stop lamp switch circuit.
NO
Repair or replace the wheel speed sensor.
CHECK THE STOP LAMP SWITCH CIRCUIT.
1. Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.
2. Measure the voltage between terminal 20 of the ABS control module harness side connector and body
ground when brake pedal is depressed.
Specification: approximately B+
Is the voltage within specification?
YES
Check the hydraulic circuit for leakage.
NO
Repair the stop lamp switch. Repair an open in the wire between the ABS control module and the stop
lamp switch.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 15: Checking Stop Lamp Switch Circuit
Courtesy of KIA MOTORS AMERICA, INC.
CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines .
Inspect leakage of the hydraulic lines.
Is the system operating to specifications?
YES
The problem is still occurring, replace the ABS control module.
NO
Replace the leaking hydraulic lines.
COMMUNICATION WITH SCAN TOOL IS NOT POSSIBLE (COMMUNICATION WITH ANY
SYSTEM IS NOT POSSIBLE)
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
Possible malfunction in the power supply system
(including ground) for the diagnosis line.
An open in the wire
Poor ground
Inoperative power source circuit
INSPECTION PROCEDURES
CHECK THE POWER SUPPLY CIRCUIT FOR THE DIAGNOSIS
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Specification: approximately B+
Is voltage within specification?
YES
Check the ground circuit for the diagnosis.
NO
Repair an open in the wire. Check and replace fuse (15A) from the engine compartment junction block.
Fig. 16: Checking Power Supply Circuit
Courtesy of KIA MOTORS AMERICA, INC.
CHECK THE GROUND CIRCUIT FOR THE DIAGNOSIS
Check for continuity between terminal 5 of the data link connector and body ground.
Is there continuity?
NO
Repair an open in the wire between terminal 5 of the data link connector and
round point.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 17: Checking Ground Circuit
Courtesy of KIA MOTORS AMERICA, INC.
COMMUNICATION WITH SCAN TOOL IS NOT POSSIBLE (COMMUNICATION WITH ABS
ONLY IS NOT POSSIBLE)
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
When communication with Scan Tool is not
possible, the cause may be probably an open in the
HECU power circuit or an open in the diagnosis
output circuit.
INSPECTION PROCEDURES
CHECK FOR CONTINUITY IN THE DIAGNOSIS LINE
An open in the wire
Inoperative HECU
Inoperative power source circuit
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 11 of the ABS control module connector and 1 of the data link
connector.
Is there continuity?
YES
Check the power source of ABS control module.
NO
Repair an open in the wire.
CHECK THE POWER SOURCE OF ABS CONTROL MODULE
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2008 Kia Sedona
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1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 18 of the ABS control module
harness side connector and body ground.
Specification: approximately B+
Is voltage within specification?
YES
Check for poor ground.
NO
Check the harness or connector between the fuse (10A) in the engine compartment junction block
and the ABS control module. Repair if necessary.
Fig. 18: Checking Harness Or Connector Between Fuse Engine Compartment Junction Block And
ABS Control Module
Courtesy of KIA MOTORS AMERICA, INC.
CHECK FOR POOR GROUND
Check for continuity between terminal 5 of the data link connector and ground point.
YES
Replace the ABS control module and recheck.
NO
Repair an open in the wire or poor
round.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 19: Checking Ground Circuit
Courtesy of KIA MOTORS AMERICA, INC.
WHEN IGNITION KEY IS TURNED ON (ENGINE OFF), THE ABS WARNING LAMP DOES NOT
LIGHT UP
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
When current flows in the HECU the ABS warning
lamp turns from ON to OFF as the initial check.
Therefore if the lamp does not light up, the cause
may be an open in the lamp power supply circuit, a
lown bulb, an open in the both circuits between the
ABS warning lamp and the HECU, and the
Inoperative ABS warning lamp bulb
Blown No.2 fuse (10A) in the engine
compartment junction block
Inoperative ABS warning lamp module
Inoperative HECU
inoperative HECU.
INSPECTION PROCEDURES
PROBLEM VERIFICATION
Disconnect the connector from the ABS control module and turn the ignition switch ON.
Does the ABS warning lamp light up?
YES
It is normal. Recheck the ABS control module.
NO
Check the power source for the ABS warning lamp.
CHECK THE POWER SOURCE FOR THE ABS WARNING LAMP
Page 26
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
1. Disconnect the instrument cluster connector and turn the ignition switch ON.
2. Measure the voltage between terminal 8 of the cluster harness side connector and body ground.
Specification: approximately B+
Is voltage within specification?
YES
Repair bulb or instrument cluster assembly.
NO
Check for blown fuse.
Fig. 20: Measuring Voltage Between Terminal Cluster Harness Side Connector And Body Ground
Courtesy of KIA MOTORS AMERICA, INC.
CHECK FOR BLOWN FUSE
Check continuity of fuse (10A) from the engine compartment junction block.
Is there continuity?
YES
Repair an open in the wire between ABS fuse and 1 of cluster connector.
NO
Replace the blown fuse.
EVEN AFTER THE ENGINE IS STARTED, THE ABS WARNING LAMP REMAINS ON
Page 27
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble SymptomsPossible Cause
If the HECU detects trouble, it lights the ABS
warning lamp while at the same time prohibiting
ABS control. At this time, the HECU records a DTC
in memory. Even though the normal code is output,
the ABS warning lamp remains ON, then the cause
may be probably an open or short in the ABS
warning lamp circuit.
INSPECTION PROCEDURES
CHECK DTC OUTPUT.
An open in the wire
Inoperative instrument cluster assembly
Inoperative ABS warning lamp module
Inoperative HECU
1. Connect the Scan Tool (pro) to the 16P data link connector located behind the driver's side kick panel.
2. Check the DTC output using Scan Tool (pro).
Is DTC output?
YES
Repair circuit indicated by code output.
NO
Check instrument cluster.
CHECK INSTRUMENT CLUSTER
Disconnect the cluster connector and turn the ignition switch ON.
Does the ABS warning lamp remains ON?
YES
Replace the instrument cluster.
NO
Check for open the wire.
CHECK FOR OPEN IN THE WIRE
Check for continuity in the wire between cluster and ABS control module.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Is there continuity?
YES
Replace the ABS control module and recheck.
NO
Repair an open in the wire between cluster and ABS control module.
BLEEDING OF BRAKE SYSTEM
This procedure should be followed to ensure adequate bleeding of air and filling of the ABS unit, brake lines
and master cylinder with brake fluid.
1. Remove the reservoir cap and fill the brake reservoir with brake fluid.
CAUTION: If there is any brake fluid on any painted surface, wash it off
immediately.
NOTE:When pressure bleeding, do not depress the brake pedal.
Recommended fluid....... DOT3 or DOT4
2. Connect a clear plastic tube to the brake caliper bleeder plug and insert the other end of the tube into a
half filled clear plastic bottle.
Fig. 21: Identifying Caliper
Courtesy of KIA MOTORS AMERICA, INC.
3. Connect the scan tool to the data link connector located underneath the dash panel.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 22: Connecting Scan Tool To Data Link Connector
Courtesy of KIA MOTORS AMERICA, INC.
4. Select and operate according to the instructions on the scan tool screen.
CAUTION: You must obey the maximum operating time of the ABS motor with
the scan tool to prevent the motor pump from burning.
1. Select Kia vehicle diagnosis.
2. Select vehicle name.
3. Select Anti-Lock Brake system.
4. Select air bleeding mode.
5. Press "YES" to operate motor pump and solenoid valve.
Fig. 23: Scan Tool Display
- Air Bleeding Mode (Close)
Courtesy of KIA MOTORS AMERICA, INC.
6. Wait 60 sec. before operating the air bleeding again. (If not, you may damage the motor.)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 24: Scan Tool Display - Air Bleeding Mode (Open)
Courtesy of KIA MOTORS AMERICA, INC.
5. Pump the brake pedal several times, and then loosen the bleeder screw until fluid starts to run out without
bubbles. Then close the bleeder screw.
6. Repeat step 5 until there are no more bubbles in the fluid for each wheel.
Fig. 25: Identifying Bleeder Screws & Bleeding Sequence
Courtesy of KIA MOTORS AMERICA, INC.
7. Tighten the bleeder screw.
Bleed screw tightening torque:
7-1 3 Nm (0.7 -1.3 kgf.m, 5.06 - 9.4 lb-ft)
DIAGNOSTIC TROUBLE CODE CHART (DTC)
DIAGNOSTIC TROUBLE CODE CHART
DTCDESCRIPTION
C1101BATTERY VOLTAGE HIGHooo
WARNING LAMP
ABSEBDESC
REMARK
Page 31
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
C1102BATTERY VOLTAGE LOWooo
C1200FL WHEEL SPEED SENSOR-
oo
OPEN/SHORT
C1201
FL WHEEL SENSOR- RANGE/
PERFORMANCE
C1202FL WHEEL SPEED SENSOR-
oo
oo
NO SIGNAL
C1203FR WHEEL SPEED SENSOR-
oo
OPEN/SHORT
C1204
FR WHEEL SENSORRANGE/PERFORMANCE
C1205FR WHEEL SPEED SENSOR-
oo
oo
NO SIGNAL
C1206RL WHEEL SPEED SENSOR-
oo
OPEN/SHORT
C1207
RL WHEEL SENSOR- RANGE/
PERFORMANCE
C1208RL WHEEL SPEED SENSOR-
oo
oo
NO SIGNAL
C1209RR WHEEL SPEED SENSOR-
oo
OPEN/SHORT
C1210
RR WHEEL SENSORRANGE/PERFORMANCE
C1211RR WHEEL SPEED SENSOR-
oo
oo
NO SIGNAL
C1213WHEEL SPEED FREQUENCY
oo
ERROR
C1235PRESSURE SENSOR-
ooESC
ELECTRICAL
C1237PRESSURE SENSOR-SIGNAL
ooESC
FAULT
C1260STEERING ANGLE SENSOR-
oESC
SIGNAL
C1261
C1282
STEERING ANGLE SENSOR
NOT CALIBRATED
YAW RATE & LATERAL G
SENSOR-ELECTRICAL
C1283YAW RATE & LATERAL G
oESC
oESC
oESC
SENSOR-SIGNAL
C1503ESC SWITCH ERRORESC
C1513BRAKE LIGHT SWITCH
ooESC
MALFUNCTION
C1604ECU HARDWARE ERRORooo
C1605CAN CONTROL HARDWARE oESC
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
ERROR
C1611CAN TIME OUT-PCM (ECM)oESC
C1612CAN TIME OUT-PCM (TCM)oESC
C1616CAN BUS OFFoESC
C1623CAN TIMEOUT STEERING
oESC
ANGLE SENSOR
C1625CAN TIME OUT-ESCoESC
C1626IMPLAUSIBLE CONTROLooESC
C1702VARIANT CODINGoooESC
C2112VALVE RELAY
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
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Battery Voltage Monitoring
Continuous (Over voltage faults
will be always stored.)
When Vign is higher than 16.9
V.
Poor connection in power
supply circuit (IGN+)
Inoperative Generator
Inoperative HECU
Enable Conditions
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.
Page 34
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
The proper function of
valves and return pump is
not guaranteed.
Fail Safe
The ABS/EBD/ESC warning
lamps are activated.
The supply voltage to wheel
speed sensor is interrupted.
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
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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
Page 37
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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.
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
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Battery Voltage
Monitoring
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.
Page 39
Case1 (Low voltage)
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
If IGN voltage is
recovered to 9.8 V,
the system recovers
to normal state.
Enable Conditions
The monitored
supply voltage is
filtered and limited
to a rise time of 4
volts per second.
The ABS/ESC functions
Fail Safe
are inhibited.
The ABS/ESC warning
lamps are activated.
When Vign is lower than
7.6 V.
Case2 (Under voltage)
Enable Conditions
Fail Safe
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.
The ABS/EBD/ESC
functions are inhibited.
The ABS/EBD/ESC
warning lamps are
activated.
Poor connection in
power supply
circuit (IGN+)
Inoperative HECU
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
NO
Go to "POWER CIRCUIT INSPECTION" 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. B+
Fig. 32: 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 HECU harness connector. Check for open or blown 10 A ABS fuse referring to "Circuit
Diagram". Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR"
procedure.
Fig. 33: Wheel Speed Sensor Location
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
The wheel speed sensor is the essential component the ABS ECU uses to calculate vehicle speed and to
determine whether wheel lock occurs. For example, rear wheel speed signal is used as a reference value, for
vehicle speed, in front wheel drive vehicles, and if a difference between front and rear wheel speed occurs, then
ABS control is performed. Wheel speed sensor is active hall-sensor type and good at temperature and noise
characteristic. Digital waveform is produced as tone wheel rotate according as hall sensor principle. Frequency
of duty waveform is changed in proportion to rotation of tone wheel and HECU calculate vehicle speed by this
frequency.
DTC DESCRIPTION
The ABS ECU monitors the wheel speed sensor circuit continuously. A direct current is supplied in the wheelspeed sensor by a power source in the input amplifier of the control unit. If the WSS circuit is broken, in that
case a fault is detected by detecting abnormal input current. HECU cuts off the voltage supply to wheel sensor
channel which had a fault and prevent vehicle's damage due to super heated harness. If one or more defects has
detected, DTC code of defected wheel will be stored. Mutual short between sensors is detected by executing
self diagnosis successively at corresponding wheel when ignition ON. Warning lamp is turned OFF unless
additional faults are detected when the IG KEY is turned ON again.
DTC DETECTING CONDITION
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Case1
Enable Conditions
Monitoring Period
2008 Kia Sedona
Voltage monitoring
Once after power up.
Shorts between WSS lines and
shorts to UZ can be detected by
switching single WSS channels
in sequence. If there is an error
after end of test, a failure is
recognized.
Continuous
Case2
Enable Conditions
When the sensor current levels
are out of permissible range
(LOW: 7 mA, HIGH: 14 mA)
for 200 ms.
Sensor failure outside of the
ABS control cycle
1. Only one wheel failure:
Only the ABS/ESC
functions are inhibited.
The ABS/ESC warning
lamps are activated and
the EBD warning lamp is
not activated.
2. Two wheels failure: Only
the ABS/ESC functions
are inhibited. The
ABS/ESC warning lamps
are activated and the
EBD warning lamp is not
activated.
3. More than 3 wheels
failure: System down.
The ABS/EBD/ESC
functions are inhibited.
The ABS/EBD/ESC
warning lamps are
activated.
Open or short of
Wheel speed
sensor circuit
Inoperative
Wheel speed
sensor
Inoperative
HECU
Sensor failure inside the ABS
control cycle
1. One front wheel failure:
Inhibit the ABS/ESC
control. Pressure is
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
increased on a front
wheel, Pressure is
decreased on a rear
wheel. After the
ABS/ESC control, the
ABS/ESC functions are
inhibited. The ABS/ESC
warning lamps are
activated and the EBD
warning lamp is not
activated.
2. Two wheels failure:
Inhibit the ABS/ESC
control. Pressure is
increased on a front
Fail Safe
wheel, Pressure is
decreased on a rear
wheel. After the
ABS/ESC control, the
ABS/ESC functions are
inhibited. The ABS/ESC
warning lamps are
activated and the EBD
warning lamp is not
activated.
3. More than 3 wheels
failure: System down.
The ABS/EBD/ESC
functions are inhibited.
The ABS/EBD/ESC
warning lamps are
activated.
MONITOR SCAN TOOL DATA
1. Engine "ON".
2. Connect scan tool to Data Link Connector (DLC).
3. Start and drive vehicle in gear and maintain vehicle speed at or above 10km/h(6 mph)
4. Monitor the "Wheel speed sensor" parameter on the scan tool.
Specification: Approx. 10 km/h or more (6 mph or more)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 34: Scan Tool Display - Vehicle Speed Sensor
Courtesy of KIA MOTORS AMERICA, INC.
5. Is parameter displayed within specifications?
YES
Fault is intermittent caused by poor connection in wheel speed sensor harness 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
Refer to DTC C1102.
POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "ON".
2. Measure voltage between terminal (1) of the wheel speed sensor harness connector and chassis ground.
Specification: Approx. B+
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 35: Measuring Voltage Between Terminal Wheel Speed Sensor Harness Connector And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured voltage within specifications?
2008 Kia Sedona
YES
Go to "SIGNAL CIRCUIT INSPECTION" procedure.
NO
Check for open or short to GND in wheel speed sensor harness between terminal (1) of the wheel
speed sensor harness connector and terminal of the HECU harness connector. Repair as necessary
and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
5. Is the measured waveform within specifications?
YES
Go to "COMPONENT INSPECTION" procedure.
NO
Check for open or short to GND in wheel speed sensor harness between terminal (2) of the wheel
speed sensor harness connector and terminal of the HECU harness connector. Repair as necessary
and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
If OK, substitute with a known-good Wheel speed sensor and check for proper operation. If
problem is corrected, replace Wheel speed sensor and then go to "VERIFICATION OF
VEHICLE REPAIR" procedure.
COMPONENT INSPECTION
Refer to DTC C1101.
Page 48
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
3. Operate the vehicle within DTC Detecting Condition in General Information. Start and drive vehicle in
gear and maintain vehicle speed at or above 10km/h (6 mph).
4. Are any DTCs present?
YES
Go to the applicable troubleshooting procedure.
NO
System performing to specification at this time.
The ABS ECU monitors the wheel speed sensor signal continuously. This code is set when an abnormal signal
due to air gap problem or an abnormal speed change ratio are detected at the vehicle speed between 10 km/h to
80 km/h. Warning lamp is turned OFF unless additional faults are detected when the IG KEY is turned ON
again, and wheel speed is more than 12 Km/h.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Signal monitoring
The monitoring is
active from 10 km/h to
80 km/h and if no
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
ABS-control is active
at a front wheel and a
rear wheel.
Every time, if a gap in
the wheel speed sensor
signal occurs
Case1
cyclically with one
wheel rotation, a fault
Enable Conditions
counter is increased by
one. If the fault
counter exceeds its
limit of 10 V, a wheel
specific fault is stored
Monitoring Period
in the EEPROM.
Continuous
Improper installation
of wheel speed
sensor
If following
interference and signal
disturbance is
detected, a failure is
set after 10 s.
Abnormal Rotor and
wheel bearing
Inoperative Wheel
speed sensor
Inoperative HECU
non-plausible high
frequency received.
Case2
Enable Conditions
non-plausible high
wheel acceleration.
non-plausible high
wheel jerk.
non-plausible delta T
and edges at low
speed.
Fail SafeRefer to DTC C1200.
MONITOR SCAN TOOL DATA
1. Engine "ON".
2. Connect scan tool to Data Link Connector (DLC).
3. Start and drive vehicle in gear and maintain vehicle speed at or above 12km/h (7 mph).
4. Monitor the "Wheel speed sensor" parameter on the scan tool.
Specification: Approx. 12 km/h or more (7 mph or more)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 37: Scan Tool Display - Vehicle Speed Sensor
Courtesy of KIA MOTORS AMERICA, INC.
5. 5 Is parameter displayed within specifications?
YES
Fault is intermittent caused by poor connection in wheel speed sensor harness and/or HECU's
connector or was repaired and HECU memory was not cleared Go to "COMPONENT
INSPECTION" procedure
NO
Check for improper installation of wheel speed sensor If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure
Check for damage of rotor teeth or wheel bearing If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure
Substitute with a known-good Wheel speed sensor and check for proper operation If problem is
corrected, replace Wheel speed sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure
If OK, Go to "COMPONENT INSPECTION" Procedure
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed at or above 12 km/h(7 mph).
4. Does warning lamp remain On?
YES
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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 open or short of wheel speed sensor harness, inoperative wheel
speed sensor. Go to the applicable troubleshooting procedure.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
3. Operate the vehicle within DTC Detecting Condition in General Information. Start and drive vehicle in
gear and maintain vehicle speed at or above 12 km/h (7 mph).
4. Are any DTCs present?
YES
Go to the applicable troubleshooting procedure.
NO
System performing to specification at this time.
The ABS ECU monitors the wheel speed sensor signal continuously. This code is set when there is no wheel
speed signals within 10 ms to 20 ms at a vehicle speed > 43.2 km/h or a deviation between sensors exceed the
Page 52
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
threshold or one or two wheels are at 2.75 km/h while the vehicle speed is at 12 km/h. Warning lamp is turned
OFF unless additional faults are detected when the IG KEY is turned ON again, and wheel speed is more than
12 Km/h.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Signal monitoring
Case1
Monitoring Period
Enable Conditions
Continuous (only no under
voltage is not detected)
If one (or two) wheel are at 2.75
km/h and the other wheels are
above 12 km/h for longer than
1s.
During driving, when the vehicle
accelerates 18 km/h after a
particular wheel speed gets to
2.75 km/h and stays there. At
that time, If one (or two) wheel
are at 2.75 km/h.
This monitoring is
performed at the following
condition.
1. At the time the vehicle is
accelerated to 12 km/h
2. Once after energizing the
system.
3. If the vehicle was
stationary for approx. 2 s.
Monitoring Period
If one (or two) wheels are under
5 km/h and the two fastest
wheels have a velocity above 12
km/h for more than 20 s.
Continuous (If vehicle speed >
12 m/s)
but this monitoring is
disabled in the following
event
1. aquaplaning.
2. interference.
3. supply voltage below 7.6
or above 18 Volts
Page 53
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
No wheel speed signals within
10 ms to 20 ms at a vehicle
speed > 12 m/s (43.2 km/h ).
If the dynamic sensor
monitor responses, the
failures will be stored into
Case2Enable Conditions
failure memory
immediately after a
waiting period of 60 ms.
If occurs low voltage
active sensors during the
waiting period of 60 ms no
failure is stored in the
EEPROM.
Main Monitoring The main
monitor needs additional
information of the ESC-sensors
and is active for a velocity > 20
Monitoring Period
km/h and no under voltage is
detected.
Backup Monitoring
Case3
Enable Conditions
Continuous
Main Monitoring
1. If the maximum difference
of wheel speeds related to
maximum wheel speed
exceeds 5%.
2. detection filter time:
the above conditions
apply for 20 s for 1
inoperative wheel
speed sensor.
the above conditions
apply for 40 s for 2
inoperative wheel
speed sensor.
Backup Monitoring
1. If the deviation between
the fastest and the slowest
wheel is below 6 % related
to the fastest wheel when
the velocity is higher than
50 km/h.
Page 54
Case4
Case5 (ABS only)
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2. When the velocity is
below 50 km/h, if the
deviation is an absolute
value of 3 km/h.
3. detection filter time:
normally 20 s
In case of a detected
curve, the threshold
is increased with an
additional value of 4
km/h.
Monitoring Period
Enable Conditions
Continuous
The pulse width of wheel speed
sensor is below 2 ms when
vehicle speed is > 0km/h and <
20 km/h.
Monitoring Period
Continuous
If there are differences between
each wheel and if the exact fault
Enable Conditions
location can be determined when
the faulty wheel speed is at or
below 5 km/h.
Fail SafeRefer to DTC C1200.
Improper
installation of
wheel speed
sensor
Abnormal Rotor
and wheel
bearing
Inoperative
Wheel speed
sensor
Inoperative
HECU
MONITOR SCAN TOOL DATA
1. Engine "ON".
2. Connect scan tool to Data Link Connector (DLC).
3. Start and drive vehicle in gear and maintain vehicle speed at or above 50 km/h (31 mph).
4. Monitor the "Wheel speed sensor" parameter on the scan tool.
Specification: Approx. 50 km/h or more (31 mph or more)
Page 55
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 38: Scan Tool Display - Vehicle Speed Sensor
Courtesy of KIA MOTORS AMERICA, INC.
5. Is parameter displayed within specifications?
YES
Fault is intermittent caused by poor connection in wheel speed sensor harness and/or HECU's
connector or was repaired and HECU memory was not cleared. Go to "COMPONENT
INSPECTION" procedure.
NO
Check for improper installation of wheel speed sensor. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR
Check for damage of rotor teeth or wheel bearing. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR
Substitute with a known-good Wheel speed sensor and check for proper operation. If problem is
corrected, replace Wheel speed sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
If OK, Go to "COMPONENT INSPECTION" Procedure.
" procedure.
" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed at or above 50 km/h(31 mph).
4. Does warning lamp remain On?
YES
Page 56
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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 open or short of wheel speed sensor harness, inoperative wheel
speed sensor. Go to the applicable troubleshooting procedure.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
3. Operate the vehicle within DTC Detecting Condition in General Information. Start and drive vehicle in
gear and maintain vehicle speed at or above 50 km/h (31 mph).
4. Are any DTCs present?
YES
Go to the applicable troubleshooting procedure.
NO
System performing to specification at this time.
DTC C1213 WHEEL SPEED FREQUENCY ERROR
COMPONENT LOCATION
Refer to DTC C1200.
GENERAL DESCRIPTION
Refer to DTC C1200.
DTC DESCRIPTION
The ABS ECU monitors the wheel speed sensor signal continuously. This code is set, if the speed difference
with adjacent wheel is out of permissible range or the control cycle is abnormal.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Page 57
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Signal motor ring
Case 1
Case 2
Monitoring Period
Enable Conditions
Fail Safe
DTC strategy
Monitoring Period
Enable Conditions
Fail Safe
Continuous
When short cut between
the wheel speed sensor
supply and the battery.
Wheel speed sensor
signals are not reliable.
Signal motor ring
Continuous
The monitoring reports a
failure if the ABS target
slip is exceeded for a
time period > = 10 s at
one or more wheels.
If the driver brakes
or the velocity is
lower than 50 km/h
the detection time
is enlarged to 60 s.
Reduced function of the
ESC system
Improper
installation of
wheel speed sensor
Abnormal Rotor
and wheel bearing
Inoperative Wheel
speed sensor
Inoperative HECU
MONITOR SCAN TOOL DATA
1. Engine "ON".
2. Connect scan tool to Data Link Connector (DLC).
3. Start and drive vehicle in gear and maintain vehicle speed at or above 10 km/h(6 mph)
4. Monitor the "Wheel speed sensor" parameter on the scan tool.
Specification: Approx. 10 km/h or more (6 mph or more)
Page 58
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 39: Scan Tool Display - Vehicle Speed Sensor
Courtesy of KIA MOTORS AMERICA, INC.
5. Is parameter displayed within specifications?
YES
Fault is intermittent caused by poor connection in wheel speed sensor harness and/or HECU's
connector or was repaired and HECU memory was not cleared. Go to "COMPONENT
INSPECTION" procedure.
NO
Check for improper installation of wheel speed sensor. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR
Check for damage of rotor teeth or wheel bearing. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure.
Substitute with a known-good Wheel speed sensor and check for proper operation. If problem is
corrected, replace Wheel speed sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
If OK, Go to "COMPONENT INSPECTION" Procedure.
" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed at or above 10 km/h(6 mph).
4. Does warning lamp remain On?
YES
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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 open or short of wheel speed sensor harness, inoperative wheel
speed sensor. Go to the applicable troubleshooting procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1200.
DTC C1235 PRESSURE SENSOR (PRIMARY) - ELECTRICAL
COMPONENT LOCATION
Fig. 40: Identifying HECU
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
The pressure sensor, installed in the HECU, sense the brake oil pressure to judge driver's brake intention when
ESC is operating. If pressure of master cylinder is applied to pressure sensor, the strain of the piezo element is
changed and then the resistance of bridge circuit is changed according to changed strain. Therefore this changed
resistance changes output voltage of bridge circuit and output voltage changes linearly. The sensor output is a
analog signal in proportion to supply voltage, and the HECU recognizes a pressure value according to signal
ratio about supply voltage.
DTC DESCRIPTION
Each unfiltered input signal voltage is monitored to be in the range of 4.7 V < input signal voltage < 5.3 V. A
failure is detected if the output signal value is out of specified range for more than 100 ms or pressure sensor
self test form is out of specification during self test.
DTC DETECTING CONDITION
Page 60
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
2008 Kia Sedona
Voltage Monitoring
Case 1
Case 2
Case 3
Monitoring Period
Enable Conditions
Monitoring Period
Enable Conditions
Monitoring Period
Enable Conditions
Continuous
A sensor supply failure is
detected if Sensor Supply
Voltage > 5.3 V or Sensor
Supply Voltage < 4.7 V
for t > = 60 ms.
Continuous
A Fault is set if the DSO
signal is voltage of DSO >
4.7 V or voltage of DSO <
0.3V for a time t > = 100
ms.
DSO: original
pressure value.
Continuous
A Fault is set if the DSI
signal is voltage of DSI >
4.7 V or voltage of DSI <
0.3V for a time t > = 100
ms.
Case 4
Monitoring Period
Enable Conditions
Monitoring Period
DSI: inverted
pressure value.
Continuous
A Fault is set if the
voltage of DSO + DSI >
5.5V or voltage of DSO +
DSI < 4.5V for a time t >=
100ms.
DSO: original
pressure value.
DSI: inverted
pressure value.
Once during Power Up
POS detects internal
sensor malfunctions
(sensor element,
amplification, etc.). The
POS is triggered if no low
Open or short of
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Case 5Enable Conditions
Fail Safe
voltage is present and
supply voltage is switched
on. The test phase is
divided in two 60 ms
parts. DSO signal must be
< 0.5 V for 30 ms. In
phase 2 DSO signal must
e between 1.9V and 3.1V
for also 30 ms then the
POS Test is passed. The
test phase is divided in
two 60 ms parts. DSO and
DSI signal must be < 0.5
V for 30 ms. In phase 2
DSO and DSI signal must
be between 1.9 V and 3.1
V for also 30 ms then the
POS Test is passed. A
fault is set if POS does not
satisfy the above
conditions
POS: Power on self-
test.
No Pressure Signal
available.
pressure sensor
circuit
Inoperative
pressure sensor
Inoperative HECU
Sensor failure outside the
ABS control cycle
Only the ABS/ESC
functions are
inhibited, allow the
EBD. The
ABS/ESC warning
lamps are activated
and the EBD
warning lamp is not
activated.
Sensor failure inside the
ABS control cycle
Inhibit the ESC
control, allow the
EBD. The ESC
warning lamps are
activated. After the
control, the ABS
functions are
inhibited. The ABS
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON".
3. Press the brake pedal.
4. Monitor the "Pressure sensor" parameter on the scan tool.
Specification: Approx. 60 bar - 150 bar (There are difference in displayed parameter according to braking
force)
warning lamps are
activated.
Fig. 41: Scan Tool Display
- EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.
5. Whenever brake pedal is pushed down, is the pressure sensor's scan tool data changed?
YES
Fault is caused by having been repaired and HECU memory was not cleared. Clear the DTC and
then go to "VERIFICATION OF VEHICLE REPAIR
" procedure.
NO
Go to "COMPONENT INSPECTION" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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
NO
Fault is intermittent caused by open or short of wheel speed sensor harness, inoperative wheel
speed sensor. Go to the applicable troubleshooting procedure.
VERIFICATION OF VEHICLE REPAIR
2008 Kia Sedona
" procedure.
Refer to DTC C1101.
DTC C1237 PRESSURE SENSOR - OTHER
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
Refer to DTC C1235.
DTC DESCRIPTION
With the driver torque demand and the lateral acceleration a driver braking demand is calculated. Unless the
ump motor is operating or there is a brake signal, The offset compensation is executed. A failure is detected if
offset value exceeded ± 15 bar.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Voltage Monitoring
After Pressure sensor
initialization.
Monitoring Period
No under voltage
No pumps are running.
No BLS-signal is set.
The pressure sensor-offset
Page 64
Enable Conditions
Fail Safe
MONITOR SCAN TOOL DATA
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
value must be in the range of
± 15 bar. A failure is detected
if this range is exceeded.
Reduced function caused by
inoperative pressure sensor
signal.
Sensor failure outside the
ABS control cycle
Only the ABS/ESC
Open or short of pressure
sensor circuit
Inoperative pressure sensor
Inoperative HECU
functions are inhibited,
allow the EBD.
The ABS/ESC warning lamps
are activated and the EBD
Refer to DTC C1235.
COMPONENT INSPECTION
Refer to DTC C1235.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1260 STEERING ANGLE SENSOR - SIGNAL
COMPONENT LOCATION
Fig. 42: Identifying Steering Angle Sensor-Signal Component Location
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
The Steering Angle Sensor (SAS) is used to determine turning direction and speed of the steering wheel. The
HECU uses the signals from the SAS when performing ESC-related calculations.
DTC DESCRIPTION
If the SAS signal is different from calculated value by yaw-rate sensor and wheel speed sensor, mechanically
impossible SAS signal is detected, there is a difference between SAS signal and driving condition of the vehicle
calculated from yaw-rate sensor and lateral G sensor, a failure is detected.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Voltage Monitoring
Case 1
Monitoring Period
Enable Conditions
Monitoring Period
Continuous
During normal driving conditions
the long time filtered driving
direction is straight ahead. The
long time filtered SAS-value is
equivalent to the offset. If the
offset value exceeds a threshold
of approximately 15 deg a SASfault is determined. Failure
detection time depends on the
driving distance, vehicle speed
and on the amount of failed SAS
signal. Within 30 km of
symmetrical driving the
calculated offset corresponds to
the sensor offset.
Continuous (If the following
conditions are satisfied)
1. After SAS-initialization
and vehicle reference speed
> 1.4 m/s
2. No under voltage
3. At least one SAS-message
was sent in the current 20
ms-cycle.]
A SAS-gradient-failure is set, if
1. Signal gradient (steering
angle velocity) from one 20
ms-cycle to another is
higher than 40° or
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2. Change of this gradient
(steering angle
acceleration) is higher than
15°: | (LwInK0K1 .
LwInK1K2)| > 15° and |
(LwInK0K1 + LwInK1K2)|
> 15°
LwInK0K1:
Difference of the
Case 2Enable Conditions
SAS-signal between
the current 20 mscycle and the last 20
ms-cycle.
LwInK1K2:
Difference of the
SAS-signal between
the last 20 ms-cycle
and 20 ms-cycle
before.
Case 3
Case 4
Monitoring Period
Enable Conditions
Monitoring Period
Enable Conditions
Continuous (After initialization
and no under voltage detected)
If value is higher than 665° + 90°
tolerance for more than 300 ms a
fault is determined.
Continuous (during driving)
Based on a vehicle model a
reference SAS signal is build. The
difference between measured
SAS signal and SAS signal
calculated from yaw-rate sensor
signal is evaluated for fault
detection.
Dependent on the driving
conditions failures in size of [10 +
60 m/s / vehicle reference speed]
deg at steering angle are
recognized within 400 - 4800 ms
through three possible recognition
paths:
1. Curve Branch (lateral G > 2
m/s2 and left and right
curve driving)
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2. Stability Branch (no large
wheel speed differences
and stable acceleration)
3. Straight ahead Branch
(lateral G < 0.5 m/s2 and
yaw rate < 2 deg/s).
The recognition time
depends on the active
branch (the time is shorter
in a relation 1.:2.:3.-4:2:1)
and the value of the
permissible time threshold
dependent on the deviation
between the compared
signals (small deviation -->
long detection time, large
deviation --> small
detection time).
Case 5
Case 6
Monitoring Period
Enable Conditions
Monitoring Period
Enable Conditions
Monitoring Period
Initialization once in every
ignition cycle.
The monitoring is active until a
reset by a change in the SAS
signal or until a right and left
cornering can be recognized.
If there is no change in the signal,
but a right and left cornering has
been recognized, a fault is
2
determined, (lateral G > 2 m/s
in
combination with a yaw rate >
6°/s in both directions).
At a minimum change of
e.g. 5° in the signal, the
monitoring is reset.
Continuous (during driving)
The measured yaw rate and the
yaw rates, calculated from the
wheel speed sensor and SAS are
compared. If the signals don't fit
and forwards driving is detected,
a fault is determined.
Continuous (during driving)
Under normal conditions, two
Open or short of
steering angle
sensor circuit
Inoperative
steering angle
sensor
Inoperative
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SAS messages are sent in one 20
ms cycle, which is shown by an
increase of the message counter
Case 7Enable Conditions
by 2. If the message counter
shows an increase higher than 3
or lower than 1 in one 20 ms-cyle,
a fault is stored after 160 ms.
Reduced controller function
caused by inoperative SAS signal.
Fail Safe
ABS/EBD control is available.
The ESC warning lamp is
activated.
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON".
3. Turn the steering wheel to the left or right.
4. Monitor the "steering sensor" parameters on the scan tool.
HECU
Fig. 43: Scan Tool Display - EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.
5. Whenever steering wheel is turned, is the steering sensor's scan tool data changed?
YES
Fault is intermittent caused by poor connection in steering sensor harness and/or HECU's connector
or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness,
poor connection, bendin
, corrosion, contamination, deterioration, or damage. Repair or replace as
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necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
NO
Go to "COMPONENT INSPECTION" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Does warning lamp remain On?
YES
Substitute with a known-good steering angle sensor and check for proper operation. If problem is
corrected, replace sensor and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
2008 Kia Sedona
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 caused by open or short of steering angle sensor harness, inoperative
steering angle sensor. 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.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1261 STEERING ANGLE SENSOR IS NOT CALIBRATED
COMPONENT LOCATION
Refer to DTC C1260.
GENERAL DESCRIPTION
Refer to DTC C1260.
DTC DESCRIPTION
The SAS used for ESC control needs zero point adjustment because the SAS measures an absolute angle, zero
oint adjustment is done by using the scan tool device. If abnormal zero point adjustment is detected, a failure is
recognized.
DTC DETECTING CONDITION
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Signal Monitoring
2008 Kia Sedona
Monitoring Period
During SAS zero point
adjustment.
The position of steering
wheel is out of specified
Enable Conditions
range (straight position, a
max. error ±5°) during SAS
zero point adjustment.
Reduced controller function
caused by inoperative SAS
Fail Safe
signal. ABS/EBD control is
available.
The ESC warning lamp is
activated.
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON".
3. Turn the steering wheel to the full left or right position.
4. Monitor the "steering sensor" parameters on the scan tool.
A fail of SAS zero point
adjustment
Inoperative HECU
Fig. 44: Scan Tool Display - EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.
5. Is parameter displayed within specifications?
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YES
Fault is caused by having been repaired and HECU memory was not cleared. Clear the DTC and
then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
NO
Go to "COMPONENT INSPECTION" procedure.
COMPONENT INSPECTION
1. Line up wheels like (figure 1).
1. Perform the wheel alignment.
2. Line up the steering wheel in a straight.
3. Go ahead and Go back the vehicle 2-3 times without holding steering wheel.
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2. Connect scan tool to Data Link Connector (DLC).
6. Check the condition of SAS zero point adjustment by operating the vehicle (turn right and left at least 1
time)
Fig. 45: Wheel Alignment Chart
Courtesy of KIA MOTORS AMERICA, INC.
7. Is zero point adjustment completed?
YES
Go to "VERIFICATION OF VEHICLE REPAIR" procedure.
NO
Substitute with a known-
ood HECU and check for proper operation. If problem is corrected,
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1282 YAW RATE AND LATERAL G SENSOR - ELECTRICAL
COMPONENT LOCATION
Fig. 46: Locating Yaw Rate And Lateral G Sensor
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
The yaw-rate and G sensor assembly is installed on the lower floor. The yaw-rate sensor detects acceleration of
the vehicle around its vertical axis, while the G sensor detects lateral acceleration of the vehicle. When the
vehicle is not moving, the G sensor output is approximately 2.5 V.
DTC DESCRIPTION
The HECU monitors a signal voltage of either yaw-rate sensor or lateral G sensor to detect open or short to
battery or short to ground. A failure is detected if the lateral acceleration sensor or yaw rate sensor signal
voltage stays in the fault range longer than 100 ms or the lateral acceleration sensor or yaw rate sensor reference
voltage stays in the fault range longer than 200 ms, or the self test form is against specification during self test.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Voltage Monitoring
Continuous
A line fault is detected if
V[LG] < 0.3 V or V[LG]
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
> 4.7 V for a time t > =
100ms.
A line fault is detected if
V[YAW] < 0.225 V OR
V[YAW] > 4.774 V for a
Case 1Enable Conditions
time t > = 100 ms.
A line fault is detected if
V[YAW REFERENCE]
< 2.1 V OR V[YAW
REFERENCE] > 2.9 V
DTC strategy
Monitoring Period
for a time t > = 200 ms.
Self-test Monitoring
Once after power up and
no low voltage.
Inoperative Yaw
Rate & Lateral G
sensor
Open or short of
Yaw Rate &
Case 2
Enable Conditions
A line fault is detected if
0.2 V < V[LG] < 0.8 V
isn't continued for a time
Lateral G sensor
Inoperative HECU
t > = 60 ms during POS
(POS: power on self-test)
Reduced controller
function.
Inhibit the ESC control
Fail Safe
and ABS/EBD control is
available.
The ESC warning lamps
are activated.
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC).
2. Ignition "ON".
3. Monitor the "Yaw rate sensor-lateral & Yaw rate sensor-yaw" parameter on the scan tool.
Fig. 47: Scan Tool Display - EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.
4. Is parameter displayed within specifications?
YES
Fault is intermittent caused by poor connection in Yaw Rate & Lateral G sensor harness 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
Refer to DTC C1102.
POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between terminal "1" of the Yaw Rate & Lateral G sensor harness connector and chassis
ground.
Specification: Approx. B+
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 48: Measuring Voltage Between Terminal Of Yaw Rate Lateral Sensor Harness Connector
And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured voltage within specifications?
2008 Kia Sedona
YES
Go to "GROUND CIRCUIT INSPECTION" procedure.
NO
Check for open or short to GND in the Yaw Rate & Lateral G sensor harness between terminal "1"
of the Yaw Rate & Lateral G sensor harness connector and battery +. Repair as necessary and then
go to "VERIFICATION OF VEHICLE REPAIR" procedure.
GROUND CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect Yaw Rate & Lateral G sensor connector.
3. Measure resistance between terminal "4" of the Yaw Rate & Lateral G sensor harness connector and
chassis ground.
Specification: Approx. below 1ohms
Fig. 49: Measuring Resistance Between Terminal Yaw Rate Lateral Sensor Harness Connector
And Chassis Ground
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
4. Is the measured resistance within specifications?
YES
Go to "SIGNAL CIRCUIT INSPECTION" procedure.
NO
Check for open or short in the Yaw Rate & Lateral G sensor harness between terminal "4" of the
Yaw Rate & Lateral G sensor harness connector and chassis ground. Repair as necessary and then
go to "VERIFICATION OF VEHICLE REPAIR
SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
" procedure.
2. Measure voltage between terminal "3,5,6" of the Yaw Rate & Lateral G sensor harness connector and
chassis ground.
Specification: Approx. 2.5 V ( Voltage between terminal "5, 6" of the Yaw Rate & Lateral G sensor
harness connector and chassis ground.)
Fig. 50: Measuring Voltage Between Terminal Yaw Rate Lateral Sensor Harness Connector And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured voltage within specifications?
YES
Go to "SELF TEST CIRCUIT INSPECTION" procedure.
NO
Check for open or short in the Yaw Rate & Lateral G sensor harness between terminal "3, 5, 6" of
the Yaw Rate & Lateral G sensor harness connector and terminal "16, 18, 20" of the chassis
ground. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR
procedure.
"
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
If OK, Substitute with a known-good Yaw Rate & Lateral G sensor and check for proper operation.
If problem is corrected, replace sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
SELF TEST CIRCUIT INSPECTION
1. Measure waveform between terminal "2" of the Yaw Rate & Lateral G sensor harness connector and
chassis ground.
Specification: Approx. 0.2V < Voltage < 0.8V (during Ignition "ON")
Fig. 51: Measuring Waveform Between Terminal Yaw Rate Lateral Sensor Harness Connector
And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
2. Is the measured waveform within specifications?
YES
Go to "COMPONENT INSPECTION" procedure.
NO
Check for open or short to GND in the Yaw Rate & Lateral G sensor harness between terminal "2"
of the Yaw Rate & Lateral G sensor harness connector and terminal "37" of the chassis ground.
Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
If OK, Substitute with a known-good Yaw Rate & Lateral G sensor and check for proper operation.
If problem is corrected, replace sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Does warning lamp remain On?
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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 Yaw Rate & Lateral G sensor circuit and/or
inoperative Yaw Rate & Lateral G sensor or was repaired and HECU memory was not cleared. Go
to the applicable troubleshooting procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1283 YAW RATE AND LATERAL G SENSOR - SIGNAL
COMPONENT LOCATION
Refer to DTC C1282.
GENERAL DESCRIPTION
Refer to DTC C1282.
DTC DESCRIPTION
A lateral acceleration reference signal is calculated from the wheel speeds, the steering angle and the yaw rate
signals to observe the lateral acceleration sensor signal. The difference between the reference signal and the
sensor signal is evaluated for failure detection. A yaw rate reference signal is calculated from the wheel speeds,
the steering angle and the lateral acceleration signals to observe the yaw rate sensor signal. The difference
between the reference signal and the sensor signal, and the gradient of the measured sensor signal is evaluated
for the failure detection. If the difference between estimated value and measured value of the sensor is larger
than predefined value for predefined time, the failure is recognized. Plausibility faults (signals received which
fall outside of the sensor characteristics) are also recognized.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Signal Monitoring
Continuous (during stable
driving)
By building a reference
lateral G from the yaw-rate
sensor, wheel speed sensor
and the SAS it is possible to
test the later G Signal on
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
plausibility. If during stable
vehicle behavior an lateral G
Failure larger than
approximately 2.5 m/s2
occurs, the ESC controller
will disregard the lateral G
sensor information so that a
false ESC intervention is
prevented. A fault is
recognized after 1.6 s during
model validity.
The measured and offset
compensated yaw rate signal
is compared to the reference
yaw rate signal calculated
Case 1Enable Conditions
from yaw rate sensor, lateral
G sensor, SAS and wheel
speed sensor. If the measured
yaw rate deviates more than
2.5°/s plus a dynamic
threshold from the reference
yaw rate during model
validity, a failure is
recognized after 1.6 s. The
dynamic threshold is between
2.5°/s and more than 5°/s. A
typical value is 3°/s.
Case 2
Monitoring Period
Enable Conditions
During the possibility
to observe the
recognition time
depends on the amount
of failure.
Continuous (during driving)
During normal driving
conditions the long time
filtered driving direction is
straight ahead. The long time
filtered later G value is
equivalent to the offset. If the
offset value exceeds a
threshold of approximately
2.25 m/s
2
an later G fault is
determined. Failure detection
time depends on the driving
distance, vehicle speed and
on the amount of failed later
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
G signal. Within 30 km of
symmetrical driving the
calculated offset corresponds
to the sensor offset.
Monitoring Period
Continuous (If no under
voltage is detected)
Case 3
Enable Conditions
Monitoring Period
A fault is detected If the
lateral G is higher than 15
m/s2 for more than 800 ms.
Continuous (during
standstill)
Case 4
Case 5
Enable Conditions
Monitoring Period
Enable Conditions
If the filtered value of |lateral
G| is larger than 7 m/s2 for
more than 400 m/s a fault is
set.
Continuous (dependent on
driving situation)
Standstill compensation:
The offset corresponds
to the measured and
filtered input value.
Failure threshold
5.25°/s.
Fast compensation (during
driving if no standstill
compensation could be
completed):
The offset corresponds
to the slightly filtered
deviation between
measured yaw rate and
the reference yaw rate
calculated from SAS,
lateral G sensor and
wheel speed sensor.
Failure threshold is 7.5
°/s.
Long-term ("normal")
compensation (during driving
after successful standstill or
fast offset compensation):
The offset corresponds
to the strong filtered
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deviation between
measured yaw rate and
the reference yaw rate
calculated from SAS,
lateral G sensor and
wheel speed sensor.
Failure threshold is 7.5
°/s
Monitoring Period
After every standstill.
The measured yaw rate and
the model yaw rates,
calculated from the wheel
Case 6
Enable Conditions
speed sensor and SAS are
compared. If the signals
doesn't fit and forward
driving is recognized, a fault
is determined.
Monitoring Period
Continuous (after
initialization of the YRS and
if no under voltage is
detected)
Case 7
Case 8
Enable Conditions
Monitoring Period
Enable Conditions
Monitoring Period
The yaw rate sensor BITE
logic evaluates the BITEsignal by extraction of the
measured yaw rate of the
vehicle. The allowed range
for the BITE-signal is 25 °/s
± 7 °/s. If the BITE-signal is
not in the allowed range, a
suspected failure bit is set
after 200 ms. A failure is set
within 400 ms.
After YRS-initialization, no
under voltage
Depending on the driving
conditions a signal gradient
higher than 10-23 °/s / 40 ms
sets a suspected failure bit
after 280 ms, unless a single
signal peak is recognized by
a peak filter. A failure is set,
if the good check is not
settled successfully after 10
s.
Inoperative Yaw
Rate & Lateral G
sensor
Open or short of
Yaw Rate &
Lateral G sensor
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Case 9
Enable Conditions
Continuous (except spinning,
use of hand brake, unsteady
driving conditions or a
detected under voltage)
During standstill
The allowed range of
the yaw rate sensor
signal is ±30 °s.
Leaving this range for
5 s sets a fault. In case
of driving off after the
failure was present for
longer than 500 ms
during standstill, the
fault is detected
immediately.
While driving
The allowed range of
the yaw rate sensor
signal is ±94.75 °s and
a suspected failure bit
is set, if the signal is
out of this range for
500 ms. A fault is set
after 1 s.
Inoperative
HECU
Reduced controller function.
Inhibit the ESC control and
Fail Safe
ABS/EBD control is
available.
The ESC warning lamps are
activated.
MONITOR SCAN TOOL DATA
Refer to DTC C1282.
TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1102.
SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between terminal "3, 5, 6" of the Yaw Rate & Lateral G sensor harness connector and
Page 83
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Specification: Approx. 2.5V ( Voltage between terminal "5,6" of the Yaw Rate & Lateral G sensor
harness connector and chassis ground.)
Specification: Approx. above 2.1V and below 2.9V ( Voltage between terminal "3" of the Yaw Rate &
Lateral G sensor harness connector and chassis ground.)
Fig. 52: Measuring Voltage Between Terminal Yaw Rate Lateral Sensor Harness Connector And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured voltage within specifications?
YES
Go to "SELF TEST CIRCUIT INSPECTION" procedure.
NO
Check for open or short in the Yaw Rate & Lateral G sensor harness between terminal "3, 5, 6" of
the Yaw Rate & Lateral G sensor harness connector and terminal "16, 18, 20" of the chassis
ground. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR"
procedure.
If OK, Substitute with a known-good Yaw Rate & Lateral G sensor and check for proper operation.
If problem is corrected, replace sensor and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
COMPONENT INSPECTION
Refer to DTC C1282.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1503 TCS/ESC SWITCH ERROR
COMPONENT LOCATION
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 53: Identifying TCS/ESC Switch
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
The driver can deactivate ESC by pressing the ESC switch. The HECU will then activate the ESC warning lamp
and deactivate ESC functions. If the ESC switch is pressed again, ESC functions are restored.
DTC DESCRIPTION
Trouble code is set when the condition that the level of ESC switch is high for 60sec. When the ESC switch
failure is set there is no signal in the warning lamp and ABS/EBD control is available.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Enable Conditions
Fail Safe
Short circuit monitoring
Continuous
When the ESC switch is ON
for 60 sec.
ABS/EBD control is
Open or short ESC switch
Inoperative ESC switch
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
2. Measure voltage between terminal "31" of the HECU harness connector and chassis ground.
Specification: Approx B+
Fig. 54: Measuring Voltage Between Terminal Of HECU Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
3. Is the measured voltage within specifications?
YES
Fault is intermittent caused by open or short in ESC switch line, inoperative ESC switch or was
repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.
NO
Check for damaged harness and poor connection in the power harness between the battery terminal
(+) and the terminal "31" of the HECU harness connector. Check for open or blown 10 A fuse
referring to "Circuit Diagram". Repair as necessary and then go to "VERIFICATION OF
VEHICLE REPAIR" procedure.
COMPONENT INSPECTION
1. Ignition "ON".
2. Disconnect ESC switch connector.
3. Press the ESC switch.
4. Measure resistance between terminal "1" of the ESC switch harness connector and terminal "4" of the
ESC switch harness connector.
Specification: Approx. below 1 ohms
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 55: Measuring Resistance Between Terminal ESC Switch Harness Connector And Terminal
Courtesy of KIA MOTORS AMERICA, INC.
5. Is the measured resistance within specifications?
YES
Fault is intermittent caused by inoperative ESC switch or was repaired and HECU memory was not
cleared. Go to the applicable troubleshooting procedure.
NO
Substitute with a known-good ESC switch and check for proper operation. If problem is corrected,
replace ESC switch and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1513 BRAKE SWITCH ERROR
COMPONENT LOCATION
Fig. 56: Locating Brake Switch
Courtesy of KIA MOTORS AMERICA, INC.
Page 87
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
GENERAL DESCRIPTION
The brake light switch is a normally closed switch. This switch is mounted on the pedal assembly and is used to
indicate brake pedal status to the HECU.
DTC DESCRIPTION
The brake light signal is a reference to judge driver's intention for braking and The HECU checks open or short
circuit of brake light switch for normal ABS/ESC control. If an error exists, warning lamp will be turned ON.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Voltage monitoring
Continuous (only no
under voltage is not
detected)
Case 1
Case 2
Enable Conditions
Monitoring Period
Enable Conditions
If the BLS-signals is
high for 60 s, while the
gas pedal is stepped,
with vehicle speed >
10.8 km/h, offset
compensated pressure <
5 bar and no control is
active, a fault is set.
Continuous (only
normal voltage)
For redundancy reasons
an additional
BLSpVor-signal is
created by the pressure
sensor signal. If the
pressure sensor is
compensated, the
threshold for generating
the BLSpVor signal is
10 bar. If the pressure
sensor is not
compensated, the
threshold is increased
by 15 bar. If this signal
is set without any
hardware-BLS-signals
being set for at least 1
Open circuit in
brake switch line
Inoperative brake
light switch
Inoperative HECU
Page 88
Fail Safe
MONITOR SCAN TOOL DATA
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
s.
If the pressure signal is
higher than 80bar and
not both of the
hardware-BLS are set,
a fault is stored after 1
s.
Inhibit the ESC control
and ABS/EBD control
is available.
The ABS/ESC warning
lamps are activated.
1. Connect scan tool to Data Link Connector (DLC).
2. Ignition "ON" & Engine "ON"
3. Press the brake pedal.
4. Monitor the "STOP LAMP SWITCH" parameter on the scan tool.
Fig. 57: Scan Tool Display - EBD Warning Lamp
Courtesy of KIA MOTORS AMERICA, INC.
5. Whenever brake pedal is pushed down, is the brake switch's scan tool data changed ON/OFF?
YES
Fault is intermittent caused by poor connection in Yaw Rate & Lateral G sensor harness and/or
Page 89
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check
connectors for looseness, poor connection, bending, corrosion, contamination.
NO
Go to TERMINAL & CONNECTOR INSPECTION procedure.
TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1102.
SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Press the brake pedal.
2008 Kia Sedona
3. Measure voltage between the terminal "30" of the HECU harness connector and chassis ground.
Specification: Brake Switch - Approx. B+
Fig. 58: Measuring Voltage Between Terminal HECU Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured voltage within specifications?
YES
Fault is intermittent caused by open or short harness in brake light switch, inoperative brake lamp
switch or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting
procedure.
NO
Check for open or blown 15 A STOP fuse referring to "Circuit Diagram". Check for damaged
harness and poor connection in the power harness between the battery terminal (+) and the terminal
"30" of the HECU harness connector. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure. If OK, Go to "COMPONENT INSPECTION" Procedure.
Page 90
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
COMPONENT INSPECTION
1. Connect a ohmmeter to the connector of brake light switch, and check whether or not there is continuity
when the plunger of the brake light switch is pushed in and when it is released. The switch is in good
condition if there is no continuity when the plunger is pushed
2. Is there no continuity when the plunger is pushed?
YES
Fault is intermittent caused by open harness in brake light switch line, inoperative brake lamp
switch or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting
procedure.
NO
Substitute with a known-good brake lamp switch and check for proper operation. If problem is
corrected, replace brake light switch and then go to "VERIFICATION OF VEHICLE REPAIR"
procedure.
Fig. 59: Checking Plunger Continuity Of Brake Switch
Courtesy of KIA MOTORS AMERICA, INC.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1604 ECU HARDWARE ERROR
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
Page 91
p
p
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
The HECU is composed of an ECU (Electronic Control Unit) and a HCU (Hydraulic Control Unit), HCU is
composed of a source of hydraulic pressure and modulator valve block. Increase and decrease of hydraulic
ressure is operated by electronic motor, According to a detected signal by wheel speed sensor, The hydraulic
ressure which is needed for control is supplied by pump. The HCU' function which is composed of a
accumulator, return pump, solenoid valve is to increase, decrease or maintain the hydraulic pressure supplied to
a brake caliper by operating return pump according to HECU control signal while ABS control is active.
DTC DESCRIPTION
The HECU monitors the operation of the IC components such as memory, register, A/D converter and so on.
The ECU sets this code when the EEPROM data read by the master processor is different than prior data
written, or when the master/slave processor detects abnormal operation in RAM, Status Register, Interrupt,
Timer, A/D converter or cycle time.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Monitoring Period
Case 1
Enable Conditions
Monitoring Period
Case 2
Enable Conditions
Internal monitoring
Continuous
If Internal control unit
failures of the
master/slave processor or
peripheral integrated
circuits is detected.
Directly after ignition on,
during reading of
EEPROM-values
Failure is set if checksum
not correct or PSWEEPROM-Handler
reported unknown failure
during EEPROM-value
reading.
If EEPROM reading
sequence take longer then
3 s, a failure is set.
Inoperative HECU
The ABS/EBD/ESC
functions are inhibited.
Fail Safe
The ABS/EBD/ESC
warning lamps are
activated.
COMPONENT INSPECTION
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Refer to DTC C1101.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1605 CAN HARDWARE ERROR
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
The HECU send requirement data, such as Torque reduction, the number of fuel cut cylinders, and TCS control
requests, to the PCM (ECM & TCM) through CAN bus line. The PCM (ECM) performs fuel cut functions
according to requests from the HECU and retards ignition timing by torque reduction requests. The PCM
(TCM) maintains current gear positions during TCS control time, in order not to increase power which causes a
Kickdown shift.
DTC DESCRIPTION
The HECU checks the CAN control module for normal TCS control, and sets this code if CAN control module
malfunction is detected.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
CAN control module
monitoring
Monitoring Period
Immediate during start up
Faults are detected
immediately if the
Enable Conditions
initialization software can't
have write access to the
configuration registers of
Inoperative HECU
the CAN-controller module.
Fail Safe
Inhibit the ESC control and
ABS/EBD control is
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
COMPONENT INSPECTION
Page 93
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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
2008 Kia Sedona
Refer to DTC C1101.
DTC C1611 CAN TIME-OUT PCM (ECM)
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
Refer to DTC C1605.
DTC DESCRIPTION
The HECU checks the CAN communication lines for normal TCS control, and sets this code if a PCM (ECM)
message is not received within predefined time.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
CAN massage monitoring
Monitoring Period
Enable Conditions
Fail Safe
Continuous
Faults are detected if PCM
(ECM) message was not
received on time by the
CAN controller of HECU.
Inhibit the ESC control and
ABS/EBD control is
Inoperative PCM (ECM)
Inoperative HECU
Page 94
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
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.
2008 Kia Sedona
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
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 C1612 CAN TIME-OUT PCM (TCM)
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
Refer to DTC C1605.
DTC DESCRIPTION
The HECU checks the CAN communication lines for normal TCS control, and sets this code if a PCM (TCM)
message is not received within predefined time.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
CAN control module
monitoring
Page 95
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Monitoring Period
Enable Conditions
Fail Safe
COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Does warning lamp remain On?
YES
Continuous
Faults are detected if PCM
(TCM) message was not
received on time by the
CAN controller of HECU.
Inhibit the ESC control and
ABS/EBD control is
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
Inoperative PCM (TCM)
Inoperative HECU
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 C1616 CAN BUS OFF
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
Refer to DTC C1605.
DTC DESCRIPTION
The HECU checks the CAN communication lines for normal TCS control, and sets this code if re-initialization
Page 96
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
is tried for 15 times in sequence without success.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
Open or short monitoring
Monitoring Period
Continuous
A CAN BUS off fault is
established if re-
Enable Conditions
Fail Safe
initialization is tried for 15
times in sequence without
success.
Inhibit the ESC control and
Open or short circuit in
CAN line
ABS/EBD control is
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1102.
SIGNAL CIRCUIT INSPECTION
1. Ignition "OFF".
2. Measure resistance between terminal "14" of the HECU harness connector and terminal "35" of the
HECU harness connector.
Specification: Approx. 60 ohms
Fig. 60: Measuring Resistance Between Terminal HECU Harness Connector And Terminal
Courtesy of KIA MOTORS AMERICA, INC.
Page 97
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
YES
Fault is intermittent caused by open or short in CAN signal harness or was repaired and HECU
memory was not cleared. Go to the applicable troubleshooting procedure.
NO
Check for open or short in CAN signal harness between terminal "14" of the HECU harness
connector and terminal "35" of the HECU harness connector. Repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1101.
DTC C1623 CAN TIME-OUT STEERING ANGLE SENSOR
COMPONENT LOCATION
Refer to DTC C1235.
GENERAL DESCRIPTION
The Steering Angle Sensor (SAS) is composed of main gear, serve gear1 and serve gear2 to determine the
turning direction. The SAS is a CAN communication type sensor. If main gear is rotated according to the
rotation of steering wheel serve gear1 and serve gear2, which is contact with main gear, will be rotated. The
HECU detects the absolute angle by using magnetic MR effect and the difference gear ratio of each serve gear
and then send to the CAN communication line. The HECU detects the steering wheel's operating speed and
operating angle by using absolute angle, and this signal is used in a input signal of anti-roll control.
DTC DESCRIPTION
The HECU checks the CAN communication lines for normal ESC control, and sets this code if a SAS message
is not received within predefined time.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
ItemDetecting ConditionPossible cause
DTC strategy
CAN massage monitoring
Monitoring Period
Enable Conditions
Fail Safe
Continuous
Faults are detected if SAS
message was not received
on time by the CAN
controller of HECU.
Inoperative SAS
Inoperative HECU
Page 98
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Inhibit the ESC control and
ABS/EBD control is
available. Meanwhile, stop
checking the ESC switch
failure under the ESC
control.
TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1102.
POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "ON".
2. Measure voltage between terminal "2" of the steering angle sensor harness connector and chassis ground.
Specification: Approx. B+
Fig. 61: Measuring Voltage Between Terminal Steering Angle Sensor Harness Connector And
Chassis Ground
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 "2"
of the steering angle sensor harness connector. Check for open or blown 10 A ABS fuse referring to
"Circuit Diagram". Repair as necessary and then go to "VERIFICATION OF VEHICLE
REPAIR" procedure.
GROUND CIRCUIT INSPECTION
Page 99
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
1. Ignition "OFF".
2. Disconnect SAS connector.
3. Measure resistance between terminal "1" of the steering angle sensor harness connector and chassis
ground.
Specification: Approx. below 1 ohms
Fig. 62: Measuring Resistance Between Terminal Steering Angle Sensor Harness Connector And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured resistance within specifications?
YES
Go to "CAN CIRCUIT INSPECTION" procedure.
NO
Check for damaged harness and poor connection between terminal "15" of the HECU harness
connector and terminal "1" of the steering angle sensor harness connector. Repair as necessary and
then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
CAN CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect SAS connector.
3. Measure resistance between terminal "3, 4" of the steering angle sensor harness connector.
Specification: Approx. 60 ohms
Page 100
g
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 63: Measuring Resistance Between Terminal Steering Angle Sensor Harness Connector
Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured resistance within specifications?
YES
Check for improper installation of wheel speed sensor. If NG, repair as necessary and then go to
"VERIFICATION OF VEHICLE REPAIR" procedure.
If OK, Go to "COMPONENT INSPECTION" procedure.
NO
Check for damaged harness and poor connection between terminal "3, 4" of the steering angle
sensor harness connector. 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 steering angle sensor and check for proper operation. If problem is
corrected, replace sensor and then go to "VERIFICATION OF VEHICLE REPAIR
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.
" 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
troubleshootin
procedure.
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