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)

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Front speed sensor circuit

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Rear speed sensor circuit

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Brake actuator (hydraulic circuit)

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When above areas are all normal but problem still occurs, replace skid control ECU -
ABS does not operate properly Front speed sensor circuit

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Rear speed sensor circuit

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Stop light switch circuit

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Brake actuator (hydraulic circuit)

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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

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Refer to ABS Warning Light does not Come ON

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Skid control ECU -
DTC check cannot be performed Refer to ABS Warning Light Remains ON

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Refer to ABS Warning Light does not Come ON

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TC and CG terminal circuit

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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

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Skid control ECU -