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Home >> Kia >> 2009 >> Sorento Base, A5SR2 >> Repair and Diagnosis >> Brakes >> Traction Control >> Esp (Electronic Stability Program) >> DTC Troubleshooting >> DTC C1503: ESC Switch Error >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "ON" & Engine "OFF" & ESC Switch "ON".
  2. Measure voltage between terminal "31" of the HECU harness connector and chassis ground.

    Specification: Approx B+

    Fig 1: Measuring Voltage Between Terminal "31" Of HECU Harness Connector And Chassis Ground
    G06412712Courtesy of KIA MOTORS AMERICA, INC.
  3. Is the measured voltage within specifications?

    YES 

    NO 

    • Check for damaged harness and poor connection in the power harness between the battery terminal (+) and the terminal "31" of the HECU harness connector. Check for open or blown 10 A fuse referring to "Circuit Diagram". Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • If OK, Go to "COMPONENT INSPECTION " Procedure.