LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid SE >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (PHEV) >> 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 GDS.

    (Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")

  2. After finishing "ECM Neutral mode", perform "Key teaching" procedure with GDS.

    (Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")

[In the case of installing new ECM] 

Perform "Key teaching" procedure with GDS.

(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 GDS.

    (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.

[In the case of installing new ECM] 

  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect the TCM Connector (A).
  3. Disconnect the ECM Connector (B).
    G13562965Courtesy of HYUNDAI MOTOR AMERICA
  4. Remove the ECM (C) from the bracket after removing the screw (A) and nut (B).
    G13562966Courtesy of HYUNDAI MOTOR AMERICA
  5. Remove ECM (B) from the ECM and TCM bracket after loosening the bolt and nut (A).
    G13562967Courtesy of HYUNDAI MOTOR AMERICA
scientia non olet · About LEMON Manuals