Problem Symptom 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 illustration below and proceed to the relevant troubleshooting page.

PROBLEM SYMPTOM TABLE - ANTI LOCK BRAKE SYSTEM

Symptom	Suspect Area
ABS does not operate.	Only when 1. -4. are all normal and the problem is still occurring, replace the HECU. Check the DTC reconfirming that the normal code is output. Power source circuit. Speed sensor circuit. 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. Check the DTC reconfirming that the normal code is output. Wheel speed sensor circuit. Stop lamp switch circuit. Check the hydraulic circuit for leakage.
Communication with Hi-scan (pro) is not possible. (Communication with any system is not possible)	Power source circuit Diagnosis line
Communication with Hi-scan (pro) is not possible. (Communication with ABS only is not possible)	Power source circuit Diagnosis line HECU
When ignition key is turned ON (engine OFF), the ABS warning lamp does not light up.	ABS warning lamp circuit HECU
Even after the engine is started, the ABS warning lamp remains ON.	ABS warning lamp circuit HECU
Brake warning lamp is abnormal.	Brake oil level sensor Parking brake switch 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.