9. Check Output Signal Circuit For Open And Short

1. Check harness continuity between ECM terminal 42 and ECM relay terminal 1.

   Refer to Wiring Diagram.

   1. Continuity should exist. 
2. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO 11. CHECK ECM RELAY .

NG: GO TO 10.