Kia Sedona 2008 User Manual

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COMPONENTS

2008 Kia 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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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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 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 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 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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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 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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Fig. 7: ABS Circuit Diagram (1 Of 2) Courtesy of KIA MOTORS AMERICA, INC.

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Fig. 8: ABS Circuit Diagram (2 Of 2) Courtesy of KIA MOTORS AMERICA, INC.

ECU CONNECTOR

INPUT/OUTPUT (ABS)

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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

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

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

ABS HECU CONNECTOR

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ABS HECU CONNECTOR REFERENCE CHART

Connector terminal

Number Description

Ground for recirculation

pump

Ground for solenoid

valves and ECU

2 Voltage supply for pump

motor

3 Voltage supply for

solenoid valves

9 6

Voltage supply for the

active wheel speed sensor

FL, FR, RL, RR

5 10 17

signal wheel speed sensor

FL, FR, RL, RR

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

Voltage (Low): 0.44-0.63

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

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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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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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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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?

 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.

 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.

 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.

 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.

 Replace the leaking hydraulic lines.

ABS DOES NOT OPERATE (INTERMITTENTLY)

DETECTING CONDITION

DETECTING CONDITION CHART

Trouble Symptoms Possible Cause

 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?

 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.

 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.

 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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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.

 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.

 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?

 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.

 Repair an open in the wire.

CHECK THE POWER SOURCE OF ABS CONTROL MODULE

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

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.

 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.

 Repair an open in the wire or poor

round.

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

Fig. 19: Checking Ground Circuit Courtesy of KIA MOTORS AMERICA, INC.

WHEN IGNITION KEY IS TURNED ON (ENGINE OFF), THE ABS WARNING LAMP DOES NOT LIGHT UP

DETECTING CONDITION

DETECTING CONDITION CHART

Trouble 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.

 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.

 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.

 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.

 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.

 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.

 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

NO SIGNAL

C1203 FR WHEEL SPEED SENSOR-

o o

OPEN/SHORT

C1204

FR WHEEL SENSORRANGE/PERFORMANCE

C1205 FR WHEEL SPEED SENSOR-

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

NO SIGNAL

C1209 RR WHEEL SPEED SENSOR-

o o

OPEN/SHORT

C1210

RR WHEEL SENSORRANGE/PERFORMANCE

C1211 RR WHEEL SPEED SENSOR-

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

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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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

 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

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 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.

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 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.

 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.

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 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.

 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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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.

 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.

 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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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.

 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

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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

 Go to TERMINAL & CONNECTOR INSPECTION procedure.

TERMINAL & CONNECTOR INSPECTION

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

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

 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.

 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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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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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.

 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.

 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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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.

 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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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.

 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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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

 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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 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.

 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.

 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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 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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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.

 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.

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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 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.

 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.

 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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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.

 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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 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.

 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.

 Go to "COMPONENT INSPECTION" procedure.

COMPONENT INSPECTION

1. Ignition "OFF".

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

2. Engine "ON".

3. Does warning lamp remain On?

YES

 Substitute with a known-good HECU and check for proper operation. If problem is corrected,

replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR

 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

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

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

 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.

 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?

Page 71

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.

 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.

 Substitute with a known-

ood HECU and check for proper operation. If problem is corrected,

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

replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101.

DTC C1282 YAW RATE AND LATERAL G SENSOR - ELECTRICAL

COMPONENT LOCATION

Fig. 46: Locating Yaw Rate And Lateral G Sensor Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

The yaw-rate and G sensor assembly is installed on the lower floor. The yaw-rate sensor detects acceleration of the vehicle around its vertical axis, while the G sensor detects lateral acceleration of the vehicle. When the vehicle is not moving, the G sensor output is approximately 2.5 V.

DTC DESCRIPTION

The HECU monitors a signal voltage of either yaw-rate sensor or lateral G sensor to detect open or short to battery or short to ground. A failure is detected if the lateral acceleration sensor or yaw rate sensor signal voltage stays in the fault range longer than 100 ms or the lateral acceleration sensor or yaw rate sensor reference voltage stays in the fault range longer than 200 ms, or the self test form is against specification during self test.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

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.

 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.

 Check for open or short to GND in the Yaw Rate & Lateral G sensor harness between terminal "1"

of the Yaw Rate & Lateral G sensor harness connector and battery +. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.

GROUND CIRCUIT INSPECTION

1. Ignition "OFF".

2. Disconnect Yaw Rate & Lateral G sensor connector.

3. Measure resistance between terminal "4" of the Yaw Rate & Lateral G sensor harness connector and chassis ground.

Specification: Approx. below 1ohms

Fig. 49: Measuring Resistance Between Terminal Yaw Rate Lateral Sensor Harness Connector And Chassis Ground

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

4. Is the measured resistance within specifications?

YES

 Go to "SIGNAL CIRCUIT INSPECTION" procedure.

 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.

 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.

 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.

 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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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

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.

 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.

 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.

 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

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

 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.

 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.

 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.

 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.

 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.

 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.

 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.

 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.

 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.

 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.

 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

 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.