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Home >> Kia >> 2017 >> Optima EX >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System (Abs) (Except HEV) >> Troubleshooting >> ABS Does Not Operate >> Check the Power Source Circuit

Check the Power Source Circuit

  1. Disconnect the connector from the ABS control module.
  2. Switch "ON" the ignition, and measure the voltage between terminal 32 of the ABS control module harness side connector and body ground.

    Specification:  approximately B+

    Is the voltage within specification?

    YES 

    • Check the ground circuit.

    NO 

    • Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS control module. Repair if necessary.
    Fig 1: Measuring Voltage Between Terminal 32 Of ABS Control Module Harness Side Connector And Body Ground
    G12142176Courtesy of KIA MOTORS AMERICA, INC.

Check the ground circuit 

  1. Disconnect the connector from the ABS control module.
  2. Check for continuity between terminals 13, 38 of the ABS control module harness side connector and ground point.

    Is there continuity?

    YES 

    • Check the wheel speed sensor circuit.

    NO 

    • Repair an open in the wire and ground point.
    Fig 2: Checking For Continuity Between Terminals 13 Or 38 Of ABS Control Module Harness Side Connector And Ground Point
    G12142177Courtesy of KIA MOTORS AMERICA, INC.