2007 Hyundai Azera GLSFACTORY OEM SERVICE PROCEDURE

Problem Symptoms: Notes

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

PROBLEM SYMPTOMS CHART

Symptom Suspect Area
ABS DOES NOT OPERATE . Only when 1. -4. are all normal and the problem is still occurring, replace the HECU.
  1. Check the DTC reconfirming that the normal code is output.
  2. Power source circuit.
  3. Speed sensor circuit.
  4. 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.
  1. Check the DTC reconfirming that the normal code is output.
  2. Wheel speed sensor circuit.
  3. Stop lamp switch circuit.
  4. Check the hydraulic circuit for leakage.
COMMUNICATION WITH HI-SCAN (PRO) IS NOT POSSIBLE .
(Communication with any system is not possible)
  1. Power source circuit
  2. Diagnosis line
COMMUNICATION WITH HI-SCAN (PRO) IS NOT POSSIBLE .
(Communication with ABS only is not possible)
  1. Power source circuit
  2. Diagnosis line
  3. HECU
WHEN IGNITION KEY IS TURNED ON (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.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.