Repair Procedures: Inspection

Turn the ignition switch OFF.
Disconnect the knock sensor connector (A).

Fig 1: Locating Knock Sensor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Measure resistance between the injector terminals 1 and 2.

Fig 2: Knock Sensor Connector Terminals
Courtesy of KIA MOTORS AMERICA, INC.
Check that the resistance is within the specification.
Specification: About 4.87 MΩ [20°C (68°F)]