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Home >> Hyundai >> 2021 >> Sonata Hybrid Blue >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (HEV) >> Engine Control Module (ECM) >> Repair Procedures >> Removal

Repair Procedures: Removal

NOTE:
  • If you replace the PCM, you must perform oil pressure characteristics back up & input (TCU Replacement). (Refer to Automatic Transaxle System - "AUTOMATIC TRANSAXLE CONTROL SYSTEM ")
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] 

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.

    [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 positive (+) battery cable.
  2. Disconnect the ECM Connector (A).
    G15467185Courtesy of HYUNDAI MOTOR AMERICA
  3. Remove the ECM bracket assembly (A) after loosening mounting bolt (B).

    ECM Bracket mounting bolt: 

    9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

    G15467186Courtesy of HYUNDAI MOTOR AMERICA
  4. Remove the ECM (A) from the bracket after loosening mounting bolt (B).

    ECM Mounting bolt: 

    6.9 - 8.3 N.m (0.7 - 0.85 kgf.m, 5.1 - 6.1 lb.ft)

    G15467187Courtesy of HYUNDAI MOTOR AMERICA