5. Check MAF Sensor Input Signal Circuit For Open And Short

1. Check harness continuity between MAF sensor terminal 1 and ECM terminal 91.

   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 6.

NG : Repair open circuit or short to ground or short to power in harness or connectors.