Air Recirculation Malfunction

TEST DESCRIPTION

Steps 1-8:

Steps 9-17:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for a inoperative mode actuator in one mode positions or in the wrong mode positions.
3. This step tests for a inoperative recirculation actuator in one mode positions or in the wrong mode positions.
4. This step tests for an A/C system performance that is correct for the present conditions. that would mandate a state of automatic recirculation mode being active. The automatic recirculation mode becomes active when the high side pressure reaches 2206-2620 kPa (320-380 psi). The mode remains ON until the high side pressure drops below 1447-1861 kPa (210-270 psi).
In automatic recirculation mode their will be no indication on the HVAC controller that the mode is active, the out side air (OSA) and recirculation (REC) switches and indicators will be inoperative on the HVAC controller.
10. This step tests for a internally shorted A/C high pressure recirculation switch causing the automatic recirculation mode to be active.