10203070

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

NOTES WITH REGARD TO DIAGNOSIS

The phenomena listed in the following table are not abnormal.

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 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.

SCAN TOOL (PRO) CHECK

Turn the ignition switch OFF.

Connector the Scan tool to the 16P data link connector located the driver's side kick panel.

Turn the ignition switch ON.

Check for DTC using the Scan tool

After completion trouble of the repair or correction of the problem, erase the stored fault codes using the scan tool.

Disconnect the Scan tool from the 16P data link connector.

ABS CHECK SHEET

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 system is operating to specifications. 2. Wheel speed sensor circuit. 3. Stop lamp switch circuit. 4. Check the hydraulic circuit for leakage.
Communication with Scan tool is not possible. (Communication with any system is not possible)	1. Power source circuit 2. Diagnosis line
Communication with Scan tool is not possible. (Communication with ABS only is not possible)	1. Power source circuit 2. Diagnosis 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

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

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.	- Inoperative power source circuit - Inoperative wheel speed sensor circuit - Inoperative hydraulic circuit for leakage - Inoperative HECU

INSPECTION PROCEDURES

DTC INSPECTION

Connect the Scan Tool with the data link connector and turn the ignition switch ON.

Verify that the system is operating to specifications.

Is the system operating to specifications?

▶ Check the power source circuit.

▶ Erase the DTC and recheck using Scan Tool.

CHECK THE POWER SOURCE CIRCUIT.

Disconnect the connector from the ABS control module.

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?

▶ 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.

CHECK THE GROUND CIRCUIT.

Disconnect the connector from the ABS control module.

Check for continuity between terminals 1,4 of the ABS control module harness side connector and ground point.

Is there continuity?

▶ Check the wheel speed sensor circuit.

▶ Repair an open in the wire and ground point.

CHECK THE WHEEL SPEED SENSOR CIRCUIT.

Refer to the DTC troubleshooting procedures.

Is the system operating to specifications?

▶ 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?

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

▶ Replace the leaking hydraulic lines.

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.	- Inoperative power source circuit - Inoperative wheel speed sensor circuit - Inoperative hydraulic circuit for leakage - Inoperative HECU

INSPECTION PROCEDURES

DTC INSPECTION

Connect the Scan Tool with the data link connector and turn the ignition switch ON.

Verify that the system is operating to specifications.

Is the system operating to specifications?

▶ Check the wheel speed sensor circuit.

▶ 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?

▶ Check the stop lamp switch circuit.

▶ Repair or replace the wheel speed sensor.

CHECK THE STOP LAMP SWITCH CIRCUIT.

Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.

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?

▶ 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.

CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.

Refer to the hydraulic lines.

Inspect leakage of the hydraulic lines.

Is the system operating to specifications?

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

▶ Replace the leaking hydraulic lines.

DETECTING CONDITION

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

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

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.	- An open in the wire - Inoperative HECU - Inoperative power source circuit

INSPECTION PROCEDURES

CHECK FOR CONTINUITY IN THE DIAGNOSIS LINE

Disconnect the connector from the ABS control module.

Check for continuity between terminals 11 of the ABS control module connector and 1 of the data link connector.

Is there continuity?

▶ Check the power source of ABS control module.

▶ Repair an open in the wire.

CHECK THE POWER SOURCE OF ABS CONTROL MODULE

Disconnect the connector from the ABS control module.

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?

▶ 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.

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

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 inoperative HECU.	- Inoperative ABS warning lamp bulb - Blown No.2 fuse (10A) in the engine compartment junction block - Inoperative ABS warning lamp module - 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?

▶ 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

Disconnect the instrument cluster connector and turn the ignition switch ON.

Measure the voltage between terminal 8 of the cluster harness side connector and body ground.

Specification: approximately B+

Is voltage within specification?

▶ Repair bulb or instrument cluster assembly.

▶ 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 1 of cluster connector.

▶ Replace the blown fuse.

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 - Inoperative instrument cluster assembly - Inoperative ABS warning lamp module - Inoperative HECU

INSPECTION PROCEDURES

CHECK DTC OUTPUT.

Connect the Scan Tool to the 16P data link connector located behind the driver's side kick panel.

Check the DTC output using Scan Tool.

Is DTC output?

▶ 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?

▶ 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

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

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.

Connect the scan tool to the data link connector located underneath the dash panel.

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 Hyundai 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 again. (If not, you may damage the motor.)

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.

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

Tighten the bleeder screw.

Bleed screw tightening torque:

7~1 3 Nm (0.7 ~1.3 kgf·m, 5.1 ~ 9.4 lb-ft)

DIAGNOSTIC TROUBLE CODE CHART(DTC)

● : MIL ON ○ : MIL OFF

DTC CODE	Trouble description	Warning lamp condition			Etc.
DTC CODE	Trouble description	EBD	ABS	ESP	Etc.
C1101	Battery voltage high	●	●	●
C1102	Battery voltage low	○/●	●	●
C1200	Wheel speed sensor front-LH open/short	○/●	●	●
C1201	Wheel speed sensor front-LH range / performance / intermittent	○/●	●	●
C1202	Wheel speed sensor front-LH invalid/no signal	○/●	●	●
C1203	Wheel speed sensor front-RH open/short	○/●	●	●
C1204	Wheel speed sensor front-RH range / performance / intermittent	○/●	●	●
C1205	Wheel speed sensor front-RH invalid/no signal	○/●	●	●
C1206	Wheel speed sensor rear-LH open/short	○/●	●	●
C1207	Wheel speed sensor rear-LH range / performance / intermittent	○/●	●	●
C1208	Wheel speed sensor rear-LH invalid/no signal	○/●	●	●
C1209	Wheel speed sensor rear-RH open/short	○/●	●	●
C1210	Wheel speed sensor rear-RH range / performance / intermittent	○/●	●	●
C1211	Wheel speed sensor rear-RH invalid/no signal	○/●	●	●
C1213	Wheel speed frequency error	○/●	●	●
C1235	Primary pressure sensor – electrical	○	●	●	ESP only
C1237	Pressure sensor – other	○	●	●	ESP only
C1260	Steering angle sensor – signal	○	○	●	ESP only
C1261	Steering angle sensor not calibrated	○	○	●	ESP only
C1282	Yaw rate ＆ lateral G sensor – electrical	○	○	●	ESP only
C1283	Yaw rate ＆ lateral G sensor – signal	○	○	●	ESP only
C1503	ESP switch error	○	○	●	ESP only
C1513	Brake switch error	○	●	●	ESP only
C1604	ECU hardware error	●	●	●
C1605	CAN hardware error	○	○	●	ESP only
C1611	CAN time-out EMS	○	○	●	ESP only
C1612	ECU(brake system) hardware error	○	○	●	ESP only
C1616	CAN bus off ESP	○	○	●	ESP only
C1623	CAN time-out SAS	○	○	●	ESP only
C1625	CAN time-out ESP	○	○	●	ESP only
C1626	Implausible Control	○	●	●	ESP only
C1702	Variant Coding	●	●	●	ESP only
C2112	Valve relay error	○/●	●	●
C2308	Front-LH Valve error (Inlet valve)	●	●	●
C2312	Front-LH Valve error (Outlet valve)	●	●	●
C2316	Front-RH Valve error (Inlet valve)	●	●	●
C2320	Front-RH Valve error (Outlet valve)	●	●	●
C2324	Rear-LH Valve error (Inlet valve)	●	●	●
C2328	Rear-LH Valve error (Outlet valve)	●	●	●
C2332	Rear-RH Valve error (Inlet valve)	●	●	●
C2336	Rear-RH Valve error (Outlet valve)	●	●	●
C2366	USV1 error	●	●	●	ESP only
C2370	USV2 error	●	●	●	ESP only
C2372	HSV1 error	●	●	●	ESP only
C2374	HSV2 error	●	●	●	ESP only
C2402	Motor electrical	●	●	●