LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2021 >> Veloster N Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System >> Engine Control Module (ECM) >> Repair Procedures >> Removal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Repair Procedures: Removal

CAUTION:
  • When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.

[In the case of installing used ECM] 
  1. Perform "ECM Neutral mode" procedure with diagnostic tool. (Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")
  2. After finishing "ECM Neutral mode", perform "Key teaching" procedure with diagnostic tool. (Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")

[In the case of installing new ECM] 
  • Perform "Key teaching" procedure with diagnostic tool. (Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")
CAUTION:
  • When replacing the ECM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.

[In the case of installing used ECM] 
  1. Perform "ECM Neutral mode" procedure with diagnostic tool. (Refer to Body Electrical System - "SMART KEY ")
  2. After finishing "ECM Neutral mode", insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically. (Refer to Body Electrical System - "SMART KEY ")

[In the case of installing new ECM] 
  • Insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect the ECM Connector (A).
    G15472047Courtesy of HYUNDAI MOTOR AMERICA
  3. Remove the air battery. (Refer to Engine Electrical System - "BATTERY ")
  4. Remove the mounting bolts (A) and then remove the ECM (B).
    G15472048Courtesy of HYUNDAI MOTOR AMERICA