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Problem Symptoms Table

Symptom Suspect Area
ABS does not operate. If 1-4 are all normal and the problem persists, replace the HECU.
  1. Check the DTC reconfirming that normal code is set off.
  2. Power source circuit.
  3. Speed sensor circuit.
  4. Check the hydraulic circuit for leakage.
ABS does not operate intermittently. If 1-4 are all normal and the problem persists, replace the ABS actuator assembly.
  1. Check the DTC reconfirming that normal code is set off.
  2. Wheel speed sensor circuit.
  3. Stop lamp switch circuit.
  4. Check the hydraulic circuit for leakage.
Communication with KDS/GDS is not possible.
(Communication with any system is not possible)
  1. Power source circuit
  2. CAN line
Communication with KDS/GDS is not possible.
(Communication with ABS only is not possible)
  1. Power source circuit
  2. CAN line
  3. HECU
When ignition is switched "ON" (with engine "OFF"), the ABS warning lamp does not light up.
  1. ABS warning lamp circuit
  2. HECU
Even after the engine is started, the ABS warning lamp remains ON.
  1. ABS warning lamp circuit
  2. HECU
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.
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