Signal Circuit Inspection

Ignition "ON" & Engine "OFF".
Disconnect the "INPUT SPEED SENSOR" connector.
Measure voltage between terminal "1" of the INPUT SPEED SENSOR harness connector and chassis ground.
Specification: approx. 2.5V ± 1.2V

Fig 1: Measuring Voltage Between Terminal Of Input Speed Sensor Harness Connector
Courtesy of KIA MOTORS AMERICA, INC.
Is voltage within specifications?
YES : --> Go to "GROUND CIRCUIT INSPECTION " procedure.

NO : --> Check for open or short in harness. Repair as necessary and Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- If signal circuit in harness is OK, Go to step 2 CHECK PCM of the "COMPONENT INSPECTION " procedure.