5) Check ECM Ground Circuit For Open And Short-I

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 1, 115, 116 and engine ground.

   Refer to Wiring Diagram.

   1. Continuity should exist. 
4. Also check harness for short to power.

OK or NG 

1. OK: GO TO 6 .
2. NG: GO TO 5.