90S Quattro (Canada) V6-2.8L (AAH) (1993)
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install new 0-ring seal -A- (7.6 mm x 1 mm), lubricate with refrigerant oil and ensure proper seating in groove
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torque switch to 5 Nm (44 in.lb)
LOW PRESSURE SWITCH
Switch located on passenger side (interior) between heater housing and firewall
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remove passenger's side lower instrument panel cover
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remove Engine Control Module (ECM) -A- in direction of -arrow-, see Fuel and Ignition
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remove electrical connector from low pressure switch
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using a 17 mm open end wrench approx 80 mm (3.1 in.) long, remove low pressure switch
^ refrigerant system remains closed (Schrader valve under switch)
Note
Illustration shows low pressure switch with heater housing removed.
- install new 0-ring seal -A- (8.9 mm x 1.8 mm), lubricate with refrigerant oil and ensure proper seating in groove
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torque switch to 5 Nm (44 in.lb)
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reinstall ECM and passenger's side lower instrument panel cover