Problem Symptoms Table

If a normal code is displayed during the DTC check although 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.

NOTE: When replacing ABS ECU, sensor or etc., turn the ignition switch OFF.

ANTI-LOCK BRAKE SYSTEM WITH EBD - PROBLEM SYMPTOMS TABLE

Symptom	Suspected Area	Refer To
ABS does not operate	Only when 1 to 4 are all normal but problem still occurs, replace ABS ECU Check DTC reconfirming that normal code is output IG power source circuit Speed sensor circuit Check ABS actuator with a TOYOTA hand-held tester If abnormal, check hydraulic circuit for leak	PRE-CHECK DTC C1241/41: IG POWER SOURCE CIRCUIT DIAGNOSTIC TROUBLE CODE DEFINITIONS ABS ACTUATOR
ABS does not operate efficiently	Only when 1 to 4 are all normal but problem still occurs, replace ABS ECU Check DTC reconfirming that normal code is output Speed sensor circuit Stop light switch circuit Check ABS actuator with a TOYOTA hand-held tester If abnormal, check hydraulic circuit for leak (See page DI-306)	PRE-CHECK DIAGNOSTIC TROUBLE CODE DEFINITIONS DTC C1249/49: STOP LIGHT SWITCH CIRCUIT ABS ACTUATOR
ABS warning light is abnormal	ABS warning light circuit ABS ECU	ABS WARNING LIGHT CIRCUIT -
Brake warning light is abnormal	Brake warning light circuit ABS ECU	BRAKE WARNING LIGHT CIRCUIT -
DTC check	Only when 1 and 2 are all normal and problem still occurs, replace ABS ECU ABS warning light circuit Tc terminal circuit	ABS WARNING LIGHT CIRCUIT Tc TERMINAL CIRCUIT
Speed sensor signal check is impossible	Ts terminal circuit ABS ECU	Ts TERMINAL CIRCUIT -