Golf GL L4-2.0L (AZG) (2001)
A/C Pressure Sensor/Switch - Cooling Fan: Testing and Inspection
High Pressure Sensor G65
High Pressure Sensor, Checking
The following describes manual checking of High Pressure Sensor G65 using conventional measuring tools.
A guided checking procedure is also possible using the VAS 5051/5052 tester in operating mode "Guided Fault Finding".
Note:
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The presence of G65 is engine dependant. Where G65 is not used, A/C pressure switch F129 is used instead.
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Where G65 is used, its wiring circuit varies according to engine application (E.g.: some are connected to the ECM, some are not).
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Always confirm system use of either G65 or F129 and applicable wiring circuit using applicable "Engine" and "Air conditioning" wiring diagrams.
Special tools, testers and auxiliary items required
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If performing guided test, use VAS 5051/5052
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Applicable wiring diagram
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VAG 1767 Ignition tester (or equivalent device capable of duty cycle measurements)
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VAG 1594/A (or C) Connector test set
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VAG 1598 A Test box
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In cases where refrigerant system may need to be recharged, use Kent-Moore ACR (or equivalent, VAG 1885 illustrated for reference only).
Prerequisites
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Workshop temperature: 20-30 ° C (68-86 ° F)
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Engine at workshop temperature.
Preparation
Note:
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The following test procedure is only possible on vehicles where the G65 square wave signal to Coolant Fan Control (FC) Control Module J293 is