10319834

TROUBLESHOOTING

STANDARD FLOW OF DIAGNSTIC 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.

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.

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 Hi-scan (pro) is not possible. (Communication with any system is not possible)	1. Power source circuit 2. Diagnosis line
Communication with Hi-scan (pro) 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
Brake warning lamp is abnormal.	1. Brake oil level sensor 2. Parking brake switch 3. Brake warning lamp circuit

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.

DIAGNOSTIC TROUBLE CODE CHART

Follow an inspection procedure of a detected DTC in the chart below.

note

EBD △ - warning lamp "ON", in case of errors on more than 2 wheels.

DTC	DESCRIPTION	WARNING LAMP "ON"				DTC MEMORY	REMARK
DTC	DESCRIPTION	ABS	EBD	TCS	ESP	DTC MEMORY	REMARK
C1101	Battery voltage high	○	○	○	○	○
C1102	Battery voltage low	○	○	○	○	○
C1200	Wheel speed sensor FR-LH open/short	○	○	○	○	○
C1201	Wheel speed sensor FR-LH range/performance/intermittent	○	△	○	○	○
C1202	Wheel speed sensor FR-LH invalid/no signal	○	△	○	○	○
C1203	Wheel speed sensor FR-LH open/short	○	△	○	○	○
C1204	Wheel speed sensor FR-LH range/performance/intermittent	○	△	○	○	○
C1205	Wheel speed sensor FR-LH invalid/no signal	○	△	○	○	○
C1206	Wheel speed sensor FR-LH open/short	○	△	○	○	○
C1207	Wheel speed sensor FR-LH range/performance/intermittent	○	△	○	○	○
C1208	Wheel speed sensor FR-LH invalid/no signal	○	△	○	○	○
C1209	Wheel speed sensor FR-LH open/short	○	△	○	○	○
C1210	Wheel speed sensor FR-LH range/performance/intermittent	○	△	○	○	○
C1211	Wheel speed sensor RR-RH invalid/no signal	○	△	○	○	○
C1604	ECU hardware error	○	○	○	○	○
C2112	Valve relay error	○	○	○	○	○
C2380	ABS/TCS/ESP valve error	○	○	○	○	○
C2402	Motor - electrical	○	×	○	○	○
C1274	G sensor - electrical	○	×	○	○	○	4WD
C1275	G sensor - signal	○	×	○	○	○	4WD
C1503	TCS switch error	×	×	○	○	○
C1605	CAN harware error	×	×	○	○	○
C1611	CAN time-out EMS	×	×	○	○	○
C1612	CAN time-out TCU	×	×	○	○	○
C1613	CAN wrong message	×	×	○	○	○
C1616	CAN bus off	×	×	○	○	○
C2227	Excessive temperature of brake disc	×	×	○	○	○
C1112	Sensor source voltage	×	×	○	○	○
C1235	Pressure sensor(primary) - electrical	×	×	×	○	○
C1237	Pressure sensor(secondary) - electrical	×	×	×	○	○
C1259	Steering angle sensor - electrical	×	×	×	○	○
C1260	Steering angle sensor - signal	×	×	×	○	○
C1282	Yaw rate & lateral G sensor - electrical	×	×	×	○	○
C1283	Yaw rate & lateral G sensor - signal	×	×	×	○	○
C1513	Brake switch error	×	×	×	○	○