Hyundai Venue: ABS(Anti-Lock Brake System) / Troubleshooting

Hyundai Venue (QX) (2020-2022) Service Manual / Brake System / ABS(Anti-Lock Brake System) / Troubleshooting

Standard Flow of Diagnostic Troubleshooting

Hyundai Venue. Troubleshooting

Notes With Regard To Diagnosis
The phenomena listed in the following table are not abnormal.
Condition
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 check is being performed.
ABS Operation sound
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)
ABS Operation (Long braking distance)
For road surfaces such as snow-covered and gravel 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.
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.

ABS Check Sheet

Hyundai Venue. Troubleshooting

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 normal code is output.
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 normal code is output.
2)
Wheel speed sensor circuit.
3)
Stop lamp switch circuit.
4)
Check the hydraulic circuit for leakage.
Communication with GDS is not possible. (Communication with any system is not possible)
1)
Power source circuit
2)
CAN line
Communication with GDS is not possible. (Communication with ABS only is not possible)
1)
Power source circuit
2)
CAN line
3)
HECU
When ignition key is turned ON (engine OFF), the ABS warning lamp does not light up.
1)
ABS warning lamp circuit
2)
HECU
Even after the engine is started, the ABS warning lamp remains ON.
1)
ABS warning lamp circuit
2)
HECU

Hyundai Venue. Troubleshooting   
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.
ABS Does Not Operate.

Detecting condition
Trouble Symptoms
Possible Cause
Brake operation varies depending on driving conditions and road surface conditions, so diagnosis can be difficult. However if a normal DTC is displayed, check the following probable cause. When the problem is still occurring, replace the ABS control module.
Faulty power source circuit
Faulty wheel speed sensor circuit
Faulty hydraulic circuit for leakage
Faulty HECU

Inspection procedures
DTC Inspection
1.
Connect the GDS with the data link connector and turn the ignition switch ON.
2.
Verify that the DTC code is output.
3.
Is the DTC code output?

Hyundai Venue. Troubleshooting

▶ Check the power source circuit.

Hyundai Venue. Troubleshooting

▶ Erase the DTC and recheck using GDS.

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 29 of the ABS control module harness side connector and body ground.
Specification : approximately B+

Hyundai Venue. Troubleshooting

3.
Is the voltage within specification?

Hyundai Venue. Troubleshooting

▶ Check the ground circuit.

Hyundai Venue. Troubleshooting

▶ 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 13, 38 of the ABS control module harness side connector and ground point.

Hyundai Venue. Troubleshooting

3.
Is there continuity?

Hyundai Venue. Troubleshooting

▶ Check the wheel speed sensor circuit.

Hyundai Venue. Troubleshooting

▶ Repair an open in the wire and ground point.

Check the wheel speed sensor circuit
1.
Refer to the DTC troubleshooting procedures.
2.
Is it normal?

Hyundai Venue. Troubleshooting

▶ Check the hydraulic circuit for leakage.

Hyundai Venue. Troubleshooting

▶ Repair or replace the wheel speed sensor.

Check the hydraulic circuit for leakage
1.
Refer to the hydraulic lines.
2.
Inspect leakage of the hydraulic lines.
3.
Is it normal?

Hyundai Venue. Troubleshooting

▶ The problem is still occurring, replace the ABS control module.

Hyundai Venue. Troubleshooting

▶ Repair the hydraulic lines for leakage.

ABS Does Not Opterate (Intermittently).

Detecting condition
Trouble Symptoms
Possible Cause
Brake operation varies depending on driving conditions and road surface conditions, so diagnosis can be difficult. However if a normal DTC is displayed, check the following probable cause. When the problem is still occurring, replace the ABS control module.
Faulty power source circuit
Faulty wheel speed sensor circuit
Faulty hydraulic circuit for leakage
Faulty HECU

Inspection procedures
DTC Inspection
1.
Connect the GDS with the data link connector and turn the ignition switch ON.
2.
Verify that the DTC code is output.
3.
Is the DTC code output?

Hyundai Venue. Troubleshooting

▶ Check the wheel speed sensor circuit.

Hyundai Venue. Troubleshooting

▶ Erase the DTC and recheck using GDS.

Check the wheel speed sensor circuit
1.
Refer to the DTC troubleshooting procedures.
2.
Is it normal?

Hyundai Venue. Troubleshooting

▶ Check the stop lamp switch circuit.

Hyundai Venue. Troubleshooting

▶ 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 23 of the ABS control module harness side connector and body ground when brake pedal is depressed.
Specification : approximately B+

Hyundai Venue. Troubleshooting

3.
Is the voltage within specification?

Hyundai Venue. Troubleshooting

▶ Check the hydraulic circuit for leakage.

Hyundai Venue. Troubleshooting

▶ 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
1.
Refer to the hydraulic lines.
2.
Inspection leakage of the hydraulic lines.
3.
Is it normal?

Hyundai Venue. Troubleshooting

▶ The problem is still occurring, replace the ABS control module.

Hyundai Venue. Troubleshooting

▶ Repair the hydraulic lines for leakage.

Communication with GDS is not possible.
(Communication with any system in not possible.)

Detecting condition
Trouble Symptoms
Possible Cause
Possible defect in the power supply system (including ground) for the diagnosis line.
An open in the wire
Poor ground
Faulty power source circuit

Inspection procedures
Check The Power Supply Circuit For The Diagnosis
1.
Measure the voltage between terminal 16 of the data link connector and body ground.
Specification : approximately B+

Hyundai Venue. Troubleshooting

2.
Is voltage within specification?

Hyundai Venue. Troubleshooting

▶ Check the ground circuit for the diagnosis.

Hyundai Venue. Troubleshooting

▶ Repair an open in the wire. Check and replace fuse from the engine compartment junction block.

Check the ground circuit for the diagnosis
1.
Check for continuity between terminal 4 of the data link connector and body ground.

Hyundai Venue. Troubleshooting

2.
Is there continuity?

Hyundai Venue. Troubleshooting

▶ Repair an open in the wire between terminal 4 of the data link connector and ground point.

Communication with GDS is not possible.
(Communication with ABS only is not possible.)

Detecting condition
Trouble Symptoms
Possible Cause
When communication with GDS is not possible, the cause may be probably an open in the HECU power circuit or an open in the diagnosis output circuit.
An open in the wire
Faulty HECU
Faulty power source circuit

Inspection procedures
Check for Continuity in the CAN Line
1.
Disconnect the connector from the ABS control module.
2.
Check for continuity between terminals 26, 14 of the ABS control module connector and 6, 14 of the data link connector.
3.
Is there continuity?

Hyundai Venue. Troubleshooting

▶ Check the power source of ABS control module.

Hyundai Venue. Troubleshooting

▶ 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 29 of the ABS control module harness side connector and body ground.
Specification : approximately B+

Hyundai Venue. Troubleshooting

3.
Is voltage within specification?

Hyundai Venue. Troubleshooting

▶ Check for poor ground.

Hyundai Venue. Troubleshooting

▶ 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
1.
Check for continuity between terminal 4 of the data link connector and ground point.

Hyundai Venue. Troubleshooting

▶ Replace the ABS control module and recheck.

Hyundai Venue. Troubleshooting

▶ Repair an open in the wire or poor ground

Hyundai Venue. Troubleshooting

When Ignition Key Is Turned ON (engine OFF), The ABS Warning Lamp Does Not Light Up.

Detecting condition
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 blown bulb, an open in the both circuits between the ABS warning lamp and the HECU, and the faulty HECU.
Faulty ABS warning lamp bulb
Blown fuse is related to ABS in the engine compartment junction block
Faulty ABS warning lamp module
Faulty HECU

Inspection procedures
Problem verification
1.
Disconnect the connector from the ABS control module and turn the ignition switch ON.
2.
Does the ABS warning lamp light up?

Hyundai Venue. Troubleshooting

▶ Inspectagain after replacing the ABS HECU.

Hyundai Venue. Troubleshooting

▶ Check the power source for the ABS warning lamp.

Check the power source for the ABS warning lamp
1.
Disconnect the instrument cluster connector (M01-A) and turn the ignition switch ON.
2.
Measure the voltage between terminal (M01-A) 29 of the cluster harness side connector and body ground.
Specification : approximately B+

Hyundai Venue. Troubleshooting

3.
Is voltage within specification?

Hyundai Venue. Troubleshooting

▶ Check the CAN circuit resistance for ABS warning lamp.

Hyundai Venue. Troubleshooting

▶ Check for blown fuse.

Check the CAN circuit resistance for ABS warning lamp
1.
Disconnect the instrument cluster connector (M01-B) and turn the ignition switch OFF.
2.
Measure the resistance between terminal (M01-B) 15 and 16 of the cluster harness side connector.
Specification : 60Ω

Hyundai Venue. Troubleshooting

3.
Is resistance within specification?

Hyundai Venue. Troubleshooting

▶ Repair ABS warning lamp bulb or instrument cluster assembly.

Hyundai Venue. Troubleshooting

▶ Check the CAN circuit wiring for ABS warning lamp.

Check the CAN circuit wiring for ABS warning lamp
1.
Disconnect the instrument cluster connector (M01-B) and ABS HECU connector, and then turn the ignition switch OFF.
2.
Check for continuity between terminal (M01-B) 15 of the cluster harness side connector and terminal 26 of ABS HECU harness side.
Check for continuity between terminal (M01-B) 16 of the cluster harness side connector and terminal 14 of ABS HECU harness side.
Specification : Below 1Ω
3.
Is resistance within specification?

Hyundai Venue. Troubleshooting

▶ Repair short of wiring between terminal 26, 14 of ABS HECU harness connector and ABS warning lamp module.

Hyundai Venue. Troubleshooting

▶ Repair open of wiring between terminal 26, 14 of ABS HECU harness connector and ABS warning lamp module.

Even After The Engine Is Started, The ABS Warning Lamp Remains ON.

Detecting condition
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.
An open in the wire
Faulty instrument cluster assembly
Faulty ABS warning lamp module
Faulty HECU

Inspection procedures
Check DTC Output
1.
Connect the GDS to the 16P data link connector located behind the driver's side kick panel.
2.
Check the DTC output using GDS.
3.
Is DTC output?

Hyundai Venue. Troubleshooting

▶ Perform the DTC troubleshooting procedure (Refer to DTC troubleshooting).

Hyundai Venue. Troubleshooting

▶ Check the CAN circuit resistance for ABS warning lamp.

Check the CAN circuit resistance for ABS warning lamp
1.
Disconnect the instrument cluster connector (M01-B) and turn the ignition switch OFF.
2.
Measure the resistance between terminal (M01-B) 15 and 16 of the cluster harness side connector.
Specification : 60Ω

Hyundai Venue. Troubleshooting

3.
Is resistance within specification?

Hyundai Venue. Troubleshooting

▶ Repair ABS warning lamp bulb or instrument cluster assembly.

Hyundai Venue. Troubleshooting

▶ Check the CAN circuit wiring for ABS warning lamp.

Check the CAN circuit wiring for ABS warning lamp
1.
Disconnect the instrument cluster connector (M01-B) and ABS HECU connector, and then turn the ignition switch OFF.
2.
Check for continuity between terminal (M01-B) 15 of the cluster harness side connector and terminal 26 of ABS HECU harness side.
Check for continuity between terminal (M01-B) 16 of the cluster harness side connector and terminal 14 of ABS HECU harness side.
Specification : Below 1Ω
3.
Is resistance within specification?

Hyundai Venue. Troubleshooting

▶ Repair short of wiring between terminal 26, 14 of ABS HECU harness connector and ABS warning lamp module.

Hyundai Venue. Troubleshooting

▶ Repair open of wiring between terminal 26, 14 of ABS HECU harness connector and ABS warning lamp 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.
Hyundai Venue. Troubleshooting   
If there is any brake fluid on any painted surface, wash it off immediately.
Hyundai Venue. Troubleshooting   
When pressure bleeding, do not depress the brake pedal.
Recommended fluid........ DOT3 or DOT4
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 GDS to the data link connector located underneath the dash panel.
4.
Select and operate according to the instructions on the GDS screen.
Hyundai Venue. Troubleshooting   
You must obey the maximum operating time of the ABS motor with the GDS to prevent the motor pump from burning.
(1)
Select vehicle name.
(2)
Select Anti-Lock Brake system.
(3)
Select HCU air bleeding mode.

Hyundai Venue. Troubleshooting

(4)
Press "OK" to operate motor pump and solenoid valve.

Hyundai Venue. Troubleshooting

(5)
Wait 60 sec. before operating the air bleeding.
(If not, you may damage the motor.)

Hyundai Venue. Troubleshooting

(6)
Perform the air bleeding.

Hyundai Venue. Troubleshooting

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 (A).
[Front]

Hyundai Venue. Troubleshooting

[Rear]

Hyundai Venue. Troubleshooting

6.
Repeat step 5 until there are no more bubbles in the fluid for each wheel.

Hyundai Venue. Troubleshooting

7.
Tighten the bleeder screw.
Bleed screw tightening torque :
7 - 13 N.m (0.7 - 1.3 kgf.m, 5.4 - 9.5 lb-ft)

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