Component Inspection

Disconnect TPS connector and measure resistance between terminals 1 and 4 of the TPS connector.
1. Specification: Approx. 3.5~6.5 kΩ (with throttle valve fully closed) at 20°C (68°F)
  
  Fig 1: Measuring Resistance Between Terminals 1 And 4 Of TPS Connector
With still TPS connector disconnected, measure resistance between terminals 1 and 3 of the TPS connector.
Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in proportion with the throttle valve opening angle.
1. Specification: Resistance changes smoothly in proportion with the throttle valve opening angle.
  
  Fig 2: Throttle Angle Resistance Graph
Is TPS normal?
YES
1. TPS is "OK".
2. Possibility of defective ECM. Temporarily test with a new ECM and check for proper operation. If problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
1. Test with a new TPS and check for proper operation. If problem is corrected, replace it. And go to "VERIFICATION OF VEHICLE REPAIR " procedure.