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Home >> Hyundai >> 2011 >> Sonata Hybrid >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - HEV >> Engine Control Module (ECM) >> Repair Procedures >> Removal
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Repair Procedures: Removal

NOTE: When replacing the ECM, the vehicle equipped with immobilizer must be performed the procedure as below. [In the case of installing used ECM]
  1. Perform "Neutral mode" procedure with GDS. (Refer to IMMOBILIZER SYSTEM in BE group)
  2. Insert the key and turn it to the IGN ON and OFF position.

Then the ECM key register process is completed automatically.
[In the case of installing new ECM]
  • Insert the key and turn it to the IGN ON and OFF position.

Then the ECM key register process is completed automatically.
  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect the ECM Connector (A).
    Fig 1: Identifying ECM Connector
    G07317740Courtesy of HYUNDAI MOTOR CO.
  3. Remove the air cleaner assembly (Refer to "INTAKE AND EXHAUST SYSTEM " in EM group).
  4. Remove the mounting bolts (A)/nut (B), and then remove the ECM (C).
    Fig 2: Identifying ECM And ECM Mounting Bolts And Nut
    G07317741Courtesy of HYUNDAI MOTOR CO.
    Fig 3: Identifying ECM
    G07317742Courtesy of HYUNDAI MOTOR CO.
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