3. Check Throttle Position Sensor Ground Circuit For Open And Short

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 89. Refer to Wiring Diagram.
   1. Continuity should exist. 
4. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO 5.

NG: GO TO 4.