ANTI-LOCK BRAKE SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Note

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

Anti-lock brake system
Symptom	Suspected Area	See page
ABS does not operate	IG power source circuit (ground circuit)	Click here
	Front speed sensor circuit	Click here
	Rear speed sensor circuit	Click here
	Brake actuator (hydraulic circuit)	Click here
	When above areas are all normal but problem still occurs, replace skid control ECU	-
ABS does not operate properly	Front speed sensor circuit	Click here
	Rear speed sensor circuit	Click here
	Stop light switch circuit	Click here
	Brake actuator (hydraulic circuit)	Click here
	When above areas are all normal but problem still occurs, replace skid control ECU	-
ABS warning light malfunction	Refer to ABS Warning Light Remains ON	Click here
	Refer to ABS Warning Light does not Come ON	Click here
	Skid control ECU	-
DTC check cannot be performed	Refer to ABS Warning Light Remains ON	Click here
	Refer to ABS Warning Light does not Come ON	Click here
	TC and CG terminal circuit	Click here
	When above areas are normal but problem still occurs, replace skid control ECU	-
Speed sensor signal check cannot be performed	TS and CG terminal circuit	Click here
Speed sensor signal check cannot be performed	Skid control ECU	-