Component Inspection

Check TPS resistance
1. Disconnect TPS connector and measure resistance between terminals "1" and "4" of the TPS connector.
  Specification: Approx. 3.5~6.5 kΩ (with throttle valve fully closed) at 20°C (68°F)
2. With still TPS connector disconnected, measure resistance between terminals "3" and "4" of the TPS connector.
3. Operate the throttle valve slowly from the idle position to the full open position and verify that the TPS's resistance changes smoothly in proportion with the throttle valve opening angle.
  Specification : Specification : TPS's resistance changes smoothly in proportion with the throttle valve opening angle.
4. Is the measured resistance within specification?
  YES
  - Go to " 2 Check PCM" as below.
  NO
  - Substitute with a known-good TPS and check for proper operation. If the problem is corrected, replace TPS. And go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check PCM.
1. Ignition "OFF".
2. Connect Scantool and Disconnect TPS connector.
3. Ignition "ON" & Select simulation function on scantool.
4. Simulate voltage at terminal "2" of TPS connector.
  
  Fig 1: Simulating Voltage At Terminal 2 Of TPS Connector
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the TPS signal value changed according to simulation voltage?
  YES
  - Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.