ELECTRONICALLY CONTROLLED BRAKE SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here

If there are no DTCs output 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.

NOTICE:

When replacing the skid control ECU, sensor, etc., turn the ignition switch off.

HINT:

Inspect the fuse and relay before investigating the suspected areas as shown in the table below.

Inspect each malfunctioning circuit in numerical order for the corresponding symptom.

ELECTRONICALLY CONTROLLED BRAKE SYSTEM
Symptom	Suspected area	See page
ABS, BA and/or EBD does not operate	1. Use a chassis dynamometer, etc. to check the ECB operation	-
	2. Check the DTC again and make sure that the normal system code is output	Click here
	3. IG power source circuit	Click here
	4. Front speed sensor circuit	Click here
	5. Rear speed sensor circuit	Click here
	6. Check the brake actuator assembly with the intelligent tester (Check brake actuator assembly operation using the active test function) If abnormal, check the hydraulic circuit for leakage	Click here
	7. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU	Click here
ABS, BA and/or EBD does not operate efficiently	1. Check that traction control has not operated by carrying out diagnosis (Traction control does not operate while the traction OFF switch is ON and the brake control warning light and SLIP indicator light are ON)	-
	2. Check the DTC again and make sure that the normal system code is output	Click here
	3. Front speed sensor circuit	Click here
	4. Rear speed sensor circuit	Click here
	5. Check the brake actuator assembly with the intelligent tester (Check brake actuator assembly operation using the active test function) If abnormal, check the hydraulic circuit for leakage	Click here
	6. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU	Click here
VSC and/or TRAC does not operate	1. Check the DTC again and make sure that the normal system code is output	Click here
	2. IG power source circuit	Click here
	3. Check the hydraulic circuit for leakage	-
	4. Front speed sensor circuit	Click here
	5. Rear speed sensor circuit	Click here
	6. Yaw rate and acceleration sensor circuit	Click here
	7. Steering angle sensor circuit	Click here
	8. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU	Click here
Sensor signal check cannot be done	1. TS and CG terminal circuit	Click here
Sensor signal check cannot be done	2. Skid control ECU	Click here
DTC check cannot be done	1. Check the DTC again and make sure that the normal system code is output	Click here
	2. TC and CG terminal circuit	Click here
	3. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU	Click here
ABS warning light abnormal (Remains on)	1. ABS warning light circuit	Click here
ABS warning light abnormal (Remains on)	2. Skid control ECU	Click here
ABS warning light abnormal (Does not come on)	1. ABS warning light circuit	Click here
ABS warning light abnormal (Does not come on)	2. Skid control ECU	Click here
Brake control warning light abnormal (Remains on)	1. Brake control warning light circuit	Click here
Brake control warning light abnormal (Remains on)	2. Skid control ECU	Click here
Brake control warning light abnormal (Does not come on)	1. Brake control warning light circuit	Click here
Brake control warning light abnormal (Does not come on)	2. Skid control ECU	Click here
BRAKE warning light abnormal (Remains on)	1. Brake fluid level warning light switch circuit	Click here
	2. BRAKE warning light circuit	Click here
	3. Skid control ECU	Click here
BRAKE warning light abnormal (Does not come on)	1. BRAKE warning light circuit	Click here
BRAKE warning light abnormal (Does not come on)	2. Skid control ECU	Click here
SLIP indicator light abnormal (Remains on)	1. SLIP indicator light circuit	Click here
SLIP indicator light abnormal (Remains on)	2. Skid control ECU	Click here
SLIP indicator light abnormal (Does not come on)	1. SLIP indicator light circuit	Click here
SLIP indicator light abnormal (Does not come on)	2. Skid control ECU	Click here
Skid control buzzer abnormal	1. Skid control buzzer abnormal	Click here
Skid control buzzer abnormal	2. Skid control ECU	Click here