Kia Sedona 2008 User Manual

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COMPONENTS
2008 Kia Sedona
2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
2008 BRAKES
ABS (Anti-Lock Brake System) - Sedona
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 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 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)
Operation Open Close OFF
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 Operation Close Open ON (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
Operation Close Close OFF
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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)
Operation Open Close OFF
Pump motor
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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 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
1 Ground for
20-39 A 10 A 10
Current
recirculation pump Ground for
4
solenoid valves
5-15 A 2.5 A 10
and ECU
2 Voltage supply for
20-39 A 10 A 10 200
pump motor
3 Voltage supply for
5-15 A 2 A 10 200
solenoid valves
18 Voltage for hybrid
1 A 500 mA 60 200
ECU
5,10,17,19
signal wheel speed sensor FL, FR, RL,
6 mA 16 mA 250 200 to ground
RR
16,9,6,8
Voltage supply for the active wheel speed sensor FL,
6 mA 16 mA 250 200 to ground
FR, RL, RR
14,24
wheel speed sensor output (FR, RL)
20 mA 10 mA 250 200
11 Diagnostic wire K 6 mA 3 mA 250 200 22 ABS-warning lamp
30 mA 5 mA 250 200
actuation
12 EBD-warning
30 mA 5 mA 250 200
lamp actuation 20 brake light switch 10 mA 5 mA 250 200 15 CAN Low 30 mA 20 mA 250 200 26 CAN High 30 mA 20 mA 250 200
max. permissible
wire resistance
R_L (mohms)
min. leakage
resistance R_P
(kohms)max min
1.5M to bat
1.5M to bat
ABS HECU CONNECTOR
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
ABS HECU CONNECTOR REFERENCE CHART
Connector terminal
Number Description
1
4
Ground for recirculation
pump
Ground for solenoid
valves and ECU
2 Voltage supply for pump
motor
3 Voltage supply for
solenoid valves
16
9 6
Voltage supply for the
active wheel speed sensor
FL, FR, RL, RR
8
5 10 17
signal wheel speed sensor
FL, FR, RL, RR
19
11 Diagnostic wire K
18 Voltage for hybrid ECU Battery voltage KEY ON/OFF
20 Brake light switch
Specification Condition
Current range: Min.10A
Max.20-39A
Current range: Min. 2.5A
Max. 5-15A
Battery voltage Always
Battery voltage IG ON
Voltage (High): 0.89-1.26
V
Voltage (Low): 0.44-0.63
V
Voltage (High) > or = 0.8
* IG ON
Voltage (Low) < or = 0.2
* IG ON
Voltage (High) > or = 0.8
* IG ON
Voltage (Low) < or = 0.3
BRAKE ON/OFF
* IG ON
Always
Always
On driving
On Scan Tool
communication
SENSOR OUTPUT ON SCAN TOOL (ABS)
SENSOR REFERENCE CHART
Description Abbreviation Unit
1 Vehicle speed sensor VEH. SPD Km/h 2 Battery voltage BATT. VOL V 3 FL Wheel speed sensor FL WHEEL Km/h 4 FR Wheel speed sensor FR WHEEL Km/h 5 RL Wheel speed sensor RL WHEEL Km/h 6 RR Wheel speed sensor RR WHEEL Km/h 7 ABS Warning lamp ABS LAMP ­8 EBD Warning lamp EBD LAMP ­9 Brake Lamp B/LAMP ­10 Pump relay state PUMP RLY -
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11 Valve relay state VALVE RLY ­12 Motor MOTOR ­13 Front Left valve (IN) FL INLET ­14 Front Right valve (IN) FR INLET ­15 Rear Left valve (IN) RL INLET ­16 Rear Right valve (IN) RR INLET ­17 Front Left valve (OUT) FL OUTLET ­18 Front Right valve (OUT) FR OUTLET ­19 Rear Left valve (OUT) RL OUTLET ­20 Rear 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
Phenomenon Explanation
System check sound When 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 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 BRAKES ABS (Anti-Lock Brake System) - Sedona
PROBLEM SYMPTOMS TABLE
Symptom Suspect 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 Symptoms Possible Cause
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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.
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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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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 Symptoms Possible 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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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 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 Symptoms Possible 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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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 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 Symptoms Possible 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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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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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 Symptoms Possible 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
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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
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DETECTING CONDITION
DETECTING CONDITION CHART
Trouble Symptoms Possible 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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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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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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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
DTC DESCRIPTION
C1101 BATTERY VOLTAGE HIGH o o o
WARNING LAMP
ABS EBD ESC
REMARK
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C1102 BATTERY VOLTAGE LOW o o o C1200 FL WHEEL SPEED SENSOR-
o o
OPEN/SHORT
C1201
FL WHEEL SENSOR- RANGE/ PERFORMANCE
C1202 FL WHEEL SPEED SENSOR-
o o
o o
NO SIGNAL
C1203 FR WHEEL SPEED SENSOR-
o o
OPEN/SHORT
C1204
FR WHEEL SENSOR­RANGE/PERFORMANCE
C1205 FR WHEEL SPEED SENSOR-
o o
o o
NO SIGNAL
C1206 RL WHEEL SPEED SENSOR-
o o
OPEN/SHORT
C1207
RL WHEEL SENSOR- RANGE/ PERFORMANCE
C1208 RL WHEEL SPEED SENSOR-
o o
o o
NO SIGNAL
C1209 RR WHEEL SPEED SENSOR-
o o
OPEN/SHORT
C1210
RR WHEEL SENSOR­RANGE/PERFORMANCE
C1211 RR WHEEL SPEED SENSOR-
o o
o o
NO SIGNAL
C1213 WHEEL SPEED FREQUENCY
o o
ERROR
C1235 PRESSURE SENSOR-
o o ESC
ELECTRICAL
C1237 PRESSURE SENSOR-SIGNAL
o o ESC
FAULT
C1260 STEERING ANGLE SENSOR-
o ESC
SIGNAL
C1261
C1282
STEERING ANGLE SENSOR NOT CALIBRATED
YAW RATE & LATERAL G SENSOR-ELECTRICAL
C1283 YAW RATE & LATERAL G
o ESC
o ESC
o ESC
SENSOR-SIGNAL
C1503 ESC SWITCH ERROR ESC C1513 BRAKE LIGHT SWITCH
o o ESC
MALFUNCTION
C1604 ECU HARDWARE ERROR o o o C1605 CAN CONTROL HARDWARE o ESC
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ERROR
C1611 CAN TIME OUT-PCM (ECM) o ESC C1612 CAN TIME OUT-PCM (TCM) o ESC C1616 CAN BUS OFF o ESC C1623 CAN TIMEOUT STEERING
o ESC
ANGLE SENSOR
C1625 CAN TIME OUT-ESC o ESC C1626 IMPLAUSIBLE CONTROL o o ESC C1702 VARIANT CODING o o o ESC C2112 VALVE RELAY
o o o
MALFUNCTION
C2308 FL INLET VALVE
o o o
MALFUNCTION
C2312 FL OUTLET VALVE
o o o
MALFUNCTION
C2316 FR INLET VALVE
o o o
MALFUNCTION
C2320 FR OUTLET VALVE
o o o
MALFUNCTION
C2324 RL INLET VALVE
o o o
MALFUNCTION
C2328 RL OUTLET VALVE
o o o
MALFUNCTION
C2332 RR INLET VALVE
o o o
MALFUNCTION
C2336 RR OUTLET VALVE
o o o
MALFUNCTION
C2366 TC VALVE PRIMARY(USV1)
o o o ESC
ERROR
C2370 TC VALVE SECONDARY
o o o ESC
(USV2) ERROR
C2372 ESC VALVE 1(HSV1) ERROR o o o ESC C2374 ESC VALVE 2 (HSV2) ERROR o o o ESC C2402 MOTOR-ELECTRICAL o o o
DTC C1101 BATTERY VOLTAGE HIGH
COMPONENT LOCATION
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 26: Identifying Battery Location Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
The ABS ECU (Electronic Control Unit) checks the battery voltage to determine, as a safety issue, whether the ABS system can operate normally or not. The normal battery voltage range is essential for controlling the ABS system as intended.
DTC DESCRIPTION
The ABS ECU monitors battery voltage by reading the value of voltage. When the voltage is higher than the expected normal value, this code is set, and the ABS/EBD/ESC functions are prohibited. If the voltage recovers, to within normal operating ranges, then the controller returns to normal operation as well.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
Item Detecting Condition Possible cause
DTC strategy
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.
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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
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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.
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information
4. Are any DTCs present?
YES
Go to the applicable troubleshooting procedure.
NO
System performing to specification at this time.
DTC C1102 BATTERY VOLTAGE LOW
COMPONENT LOCATION
Refer to DTC C1101.
GENERAL DESCRIPTION
Refer to DTC C1101.
DTC DESCRIPTION
Refer to DTC C1101.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
Item Detecting Condition Possible cause
DTC strategy
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.
GROUND CIRCUIT INSPECTION
Refer to DTC C1101.
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 C1200 FL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1203 FR WHEEL SPEED SENSOR­OPEN/SHORT; DTC C1206 RL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1209 RR WHEEL SPEED SENSOR-OPEN/SHORT
COMPONENT LOCATION
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
Item Detecting Condition Possible 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.
If OK, go to "COMPONENT INSPECTION" procedure.
HECU HARNESS CONNECTOR CHART
DTC LOCATION
DTC C1200 Front Left 16 26 DTC C1203 Front Right 9 9 DTC C1206 Rear Left 6 6 DTC C1209 Rear Right 8 8
SIGNAL CIRCUIT INSPECTION
HECU harness connector (Voltage)
ABS ESC
1. Lift the vehicle.
2. Ignition "ON".
3. Turn the wheel with hand.
4. Measure waveform between terminal of the HECU harness connector and chassis ground.
Specification: High: 1.4 V, Low: 0.7 V
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2008 Kia Sedona
2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
Fig. 36: Measuring Waveform Between Terminal Of HECU Harness Connector And Chassis Ground Courtesy of KIA MOTORS AMERICA, INC.
HECU HARNESS CONNECTOR CHART
HECU harness connector
DTC LOCATION
(Signal)
ABS ESC
DTC C1200 Front Left 5 5 DTC C1203 Front Right 10 10 DTC C1206 Rear Left 17 27 DTC C1209 Rear Right 19 29
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.
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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.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information. 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.
DTC C1201 FL WHEEL SENSOR-RANGE/PERFORMANCE; DTC C1204 FR WHEEL SENSOR­RANGE/PERFORMANCE; DTC C1207 RL WHEEL SENSOR-RANGE/PERFORMANCE; DTC C1210 RR WHEEL SENSOR-RANGE/PERFORMANCE
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 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
Item Detecting Condition Possible 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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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 Safe Refer 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
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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 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.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information. 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.
DTC C1202 FL WHEEL SPEED SENSOR-NO SIGNAL; DTC C1205 FR WHEEL SPEED SENSOR­NO SIGNAL; DTC C1208 RL WHEEL SPEED SENSOR-NO SIGNAL; DTC C1211 RR WHEEL SPEED SENSOR-NO SIGNAL
COMPONENT LOCATION
Refer to DTC C1200 FL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1203 FR WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1206 RL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1209 RR WHEEL SPEED SENSOR-OPEN/SHORT.
GENERAL DESCRIPTION
Refer to DTC C1200 FL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1203 FR WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1206 RL WHEEL SPEED SENSOR-OPEN/SHORT; DTC C1209 RR WHEEL SPEED SENSOR-OPEN/SHORT.
DTC DESCRIPTION
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
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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
Item Detecting Condition Possible 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
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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
Case2 Enable 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.
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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 Safe Refer 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)
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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
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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.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information. 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
Item Detecting Condition Possible cause
DTC strategy
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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)
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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
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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
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2008 BRAKES ABS (Anti-Lock Brake System) - Sedona
DTC DETECTING CONDITION CHART
Item Detecting Condition Possible 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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Case 5 Enable 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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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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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
Item Detecting Condition Possible 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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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
Item Detecting Condition Possible 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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2. Change of this gradient (steering angle acceleration) is higher than 15°: | (LwInK0K1 . LwInK1K2)| > 15° and | (LwInK0K1 + LwInK1K2)| > 15°
LwInK0K1:
Difference of the
Case 2 Enable 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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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 7 Enable 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
Item Detecting Condition Possible 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).
3. Go in Anti-Lock brake system, (Fig. 44).
4. Perform steering angle sensor calibration, (Fig. 45).
5. Disconnect scan tool.
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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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
Item Detecting Condition Possible 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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> 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 1 Enable 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.
Specification: Lateral G sensor: ± 0 G, YAW rate Sensor: ± 0 deg/s
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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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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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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
Item Detecting Condition Possible 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 1 Enable 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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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
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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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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
Item Detecting Condition Possible 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.
TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1102.
POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF" & ESC Switch "ON".
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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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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.
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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
Item Detecting Condition Possible 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
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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.
Specification: Lateral G sensor: ± 0 G, YAW rate Sensor: ± 0 deg/s
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
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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.
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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
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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
Item Detecting Condition Possible 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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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
Item Detecting Condition Possible 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
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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
Item Detecting Condition Possible 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
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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
Item Detecting Condition Possible cause
DTC strategy
CAN control module
monitoring
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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
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is tried for 15 times in sequence without success.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
Item Detecting Condition Possible 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.
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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
Item Detecting Condition Possible 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
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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
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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
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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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