3. Check PNP Switch Input Signal Circuit For Open And Short-I

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect "unified meter and A/C amp." harness connector.
4. Check harness continuity between ECM terminal 102 and "unified meter and A/C amp." terminal 25.

   Refer to WIRING DIAGRAM.

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

OK or NG 

1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.