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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake Diagnosis (Except HEV) >> DTC C1604-04: ECU Hardware Error >> Wiring Inspection >> Power Circuit Inspection

Power Circuit Inspection

  1. Ignition switch "OFF"
  2. Refer to "ABS CONTROL UNIT " and disconnect HECU connector.
  3. Ignition switch "ON"
  4. Measure the voltage between Pin No. 37 (IG1) terminal of HECU harness connector and chassis ground.

    Specification:  B+

  5. Is the measured value within specification?

    YES 

    NO