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Home >> Kia >> 2015 >> Optima Hybrid >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Optima HEV >> Engine Control Module (ECM) >> Repair procedures >> Removal
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Repair procedures: Removal

  1. Shut off the High Voltage circuit. (Refer to HIGH VOLTAGE SHUTOFF PROCEDURE .
  2. Turn the ignition switch OFF and disconnect the auxiliary 12V negative (-) battery terminal.
  3. Remove the air cleaner assembly. (Refer to REPAIR PROCEDURES )
  4. Disconnect the ECM connector (A) and remove the engine room relay box (B).
    Fig 1: ECM Connector & Relay Box Cover
    G00548179Courtesy of KIA MOTORS AMERICA, INC.
  5. Disconnect the battery positive (+) terminal (A).
    Fig 2: Battery Positive Cable
    G00548181Courtesy of KIA MOTORS AMERICA, INC.
  6. Remove the reservoir mounting bolt (A) and coolant outlet pipe mounting bolt (B).
  7. Fig 3: Resolver & Drain Pipe Bolts
    G00548180Courtesy of KIA MOTORS AMERICA, INC.
  8. Make a gap for removing the ECM bracket mounting bolt (C) by moving the battery cable (A) and the reservoir (B) as shown in the illustration below and then remove the bolt (C).
    Fig 4: Battery Cable, Reservoir & ECM Bracket Mounting Bolt
    G00548715Courtesy of KIA MOTORS AMERICA, INC.
  9. Remove the ECM (C) by loosening the nut (A) and the bolt (B).
    Fig 5: ECM, Nut & Bolt
    G00548716Courtesy of KIA MOTORS AMERICA, INC.