Check PCM/TCM

Ignition "ON" & Engine "OFF".
Connect "INPUT SPEED SENSOR" connector.
Install scantool and select a SIMU-SCAN,
Simulate frequency to INPUT SPEED SENSOR signal circuit.

Fig 1: Scantool Display - Simulation Voltage Of Input Speed Sensor (Input 150Hz)
Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Scantool Display - Simulation Voltage Of Input Speed Sensor (Input 250Hz)
Courtesy of KIA MOTORS AMERICA, INC.
Is "INPUT SPEED SENSOR (PG-A)" signal value changed according to simulation frequency?
YES
1. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
1. Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.