Grand Caravan FWD V6-201 3.3L VIN R MFI (1998)
High Pressure Safety Valve HVAC: Testing and Inspection
The work area temperature must not be below 10 degree Celsius (50 degree Fahrenheit) to test the compressor clutch circuit. Before starting to test the
transducer ensure that the wire connector is clean of corrosion and connected properly.
1. With gear selector in park or neutral and park brake set, start engine and allow to idle.
2. Install scan tool (DRB):
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Go to main menu
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Select stand alone scan tool (DRB)
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Select refer to the proper year diagnostics
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Select climate control
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Select sensor display
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Select A/C high side volts
For A/C system to operate a voltage between 0.451 (Low Pressure Cutout) to 4.519 (High Pressure Cutout is required. Voltages outside this range
indicate a low or high pressure condition and will not allow the compressor to cycle.
A/C Pressure Transducer Voltage
Refer to the A/C Pressure Transducer Voltage table for the appropriate condition(s)