KF3 - Verify Dual Function A/C Pressure Switch Not Closed

- Still in Output State test mode.

- High Fan Control (HFC) relay disconnected.

- Disconnect dual function A/C Pressure Switch (ACPSW) (also known as Refrigerant Containment/Fan Function Switch).

- Digital Volt/Ohm Meter (DVOM) connected to IGN Start/Run circuit and HFC circuit at the HFC relay vehicle harness connector.

- Again, cycle throttle to turn HFC output "ON" (refer to KF3).

- Does voltage now cycle high and low (about 1.0 volt change)?

Yes -- Key "OFF". Remove jumper. Reconnect HFC relay. Go to Heating and Air Conditioning/Testing and Inspection to check closed ACPSW medium pressure contacts.

No -- Remove jumper. Reconnect ACPSW. Go to KF4. KF4 - Check Continuity of LFC/HFC Circuit