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Home >> Kia >> 2007 >> Sorento Base, A5SR2 >> Repair and Diagnosis >> Brakes >> Traction Control >> Abs (Anti-Lock Brake System) >> Diagnostic Trouble Code Chart (DTC) >> DTC C1503 TCS/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 HECU Harness Connector Terminal No. 31 And Chassis Ground
    G05119639Courtesy 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.