ABS(Anti-Lock Brake System)

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.




3. Turn the ignition switch ON.
4. Check for diagnostic trouble using the scan tool
5. After completion trouble of the repair or correction of the problem, erase the stored fault codes the clear key on the scan tool.
6. Disconnect the scan tool from the 16P data link connector.

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING





NOTES WITH REGARD TO DIAGNOSIS
The phenomena listed in the following table are not abnormal.






ABS CHECK SHEET





PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.






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.




DETECTING CONDITION






INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the scan tool with the data link connector and turn the ignition switch ON.
2. Verify that the normal code is output.
Is the normal code output?
NO
> Check the power source circuit.
YES
> Erase the DTC and recheck using scan tool.

CHECK THE POWER SOURCE CIRCUIT.
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 4 of the ABS control module harness side connector and body ground.

Specification : approximately B+


Is the voltage within specification?
YES
> Check the ground circuit.
NO
> Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS control module. Repair if necessary.





CHECK THE GROUND CIRCUIT.
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 8, 24 of the ABS control module harness side connector and ground point.
Is there continuity?
YES
> Check the wheel speed sensor circuit.
NO
> Repair an open in the wire and ground point.





CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is it normal?
> 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 it normal?
> The problem is still occurring, replace the ABS control module.
> Repair the hydraulic lines for leakage.




DETECTING CONDITION






INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the scan tool with the data link connector and turn the ignition switch ON.
2. Verify that the normal code is output.
Is the normal code output?
NO
> Check the wheel speed sensor circuit.
YES
> Erase the DTC and recheck using scan tool.

CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is it normal?
> 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 18 of the ABS control module harness side connector and body ground when brake pedal is depressed.

Specification : approximately B+


Is the voltage within specification?
YES
> Check the hydraulic circuit for leakage.
NO
> Repair the stop lamp switch. Repair an open in the wire between the ABS control module and the stop lamp switch.





CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines.
Inspect leakage of the hydraulic lines.
Is it normal?
> The problem is still occurring, replace the ABS control module.
> Repair the hydraulic lines for leakage.




DETECTING CONDITION






INSPECTION PROCEDURES
CHECK THE POWER SUPPLY CIRCUIT FOR THE DIAGNOSIS
Measure the voltage between terminal 9 of the data link connector and body ground.

Specification : approximately B+


Is voltage within specification?
> Check the ground circuit for the diagnosis.
> Repair an open in the wire. Check and replace fuse (15A) from the engine compartment junction block.





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 ground point.








DETECTING CONDITION






INSPECTION PROCEDURES
CHECK FOR CONTINUITY IN THE DIAGNOSIS LINE
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 7 of the ABS control module connector and 1 of the data link connector.
Is there continuity?
YES
> Check the power source of ABS control module.
NO
> Repair an open in the wire.

CHECK THE POWER SOURCE OF ABS CONTROL MODULE
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 4 of the ABS control module harness side connector and body ground.

Specification : approximately B+


Is voltage within specification?
YES
> Check for poor ground.
NO
> Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS control module. Repair if necessary.





CHECK FOR POOR GROUND
Check for continuity between terminal 5 of the data link connector and ground point.
> Replace the ABS control module and recheck.
> Repair an open in the wire or poor ground.








DETECTING CONDITION






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?
> 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
1. Disconnect the instrument cluster connector (M03-1) and turn the ignition switch ON.
2. Measure the voltage between terminal (M03-1) 16 of the cluster harness side connector and body ground.

Specification : approximately B+


Is voltage within specification?
YES
> Repair bulb or instrument cluster assembly.
NO
> Check for blown fuse.





CHECK FOR BLOWN FUSE
Check continuity of fuse (10A) from the engine compartment junction block.
Is there continuity?
> Repair an open in the wire between ABS fuse and 12 of cluster connector.
> Replace the blown fuse.




DETECTING CONDITION






INSPECTION PROCEDURES
CHECK DTC OUTPUT.
1. Connect the scan tool to the 16P data link connector located behind the driver's side kick panel.
2. Check the DTC output using scan tool.
Is DTC output?
NO
> Repair circuit indicated by code output.
YES
> Check instrument cluster.

CHECK INSTRUMENT CLUSTER
Disconnect the cluster connector and turn the ignition switch ON.
Does the ABS warning lamp remains ON?
> 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.
Is there continuity?
> 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

2. Connect a clear plastic tube to the wheel cylinder bleeder plug and insert the other end of the tube into a half filled clear plastic bottle.
3. Connect the scan tool to the data link connector located underneath the dash panel.




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.




(6) Wait 60 sec. before operating the air bleeding.
(If not, you may damage the motor.)




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.




7. Tighten the bleeder screw.

Bleed screw tightening torque:
6.86 - 12.74 Nm (0.7 - 1.3 kgf-m, 5.09 - 9.45 lb-ft)


DIGNOSTIC TROUBLE CODE CHART(DTC)