New Beetle Convertible L5-2.5L (BPR) (2007)
High Pressure Sensor / Switch: Testing and Inspection
A/C Pressure Switch, Checking
A/C Pressure Switch, Checking
Visual check: Ensure that O-ring (color: red) 10.8mm x 1.8mm is seated in groove.
Switch function between contacts -T4a/1- and -T4a/2- (at connector housing) switches A/C Clutch (N25) off whenever:
‹› excessive refrigerant circuit pressure is present (e.g.: insufficient air flow over condenser or if system is overcharged)
‹› insufficient refrigerant circuit pressure is present (e.g.: when refrigerant has leaked out).
Switch function between contacts -T4a/3- and -T4a/4- (at connector housing) switches Coolant Fan (V7) to 2nd speed when refrigerant pressure rises.
Switching conditions
‹› Contacts - 1 - and - 2 - open below 1.2 bar (17.4 psi) and closed above 2.4 bar (34.8 psi) switching threshold
‹› Contacts- 1 - and - 2 - open above 32 bar (464 psi) and closed below 24 bar (348 psi) switching threshold
‹› Contacts - 3 - and - 4 - closed above 16 bar (232 psi) and open below 12.5 bar (181.2 psi) switching threshold
Switch function, checking