Pressure Switch (Dual Switch): Inspection

2005 Subaru Outback i, StandardSECTION Inspection
WARNING: This page is about a different car, the 2005 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect the manifold gauge to the service valve on the high-pressure side.
  2. Remove the pressure switch harness connector. Using a circuit tester, inspect the ON-OFF operation of the pressure switch.
    Fig 1: Connecting Manifold Gauge To Service Valve On High-Pressure Side
    G03752124Courtesy of SUBARU OF AMERICA, INC.
TESTER CONNECTION SPECIFICATION

Β  Tester connection Operation Specified condition kPa (kg/cm2 , psi)
High and low pressure switch 1 - 2 Turns OFF. Increasing to 2,942+/-196 (30Β°2, 427+/-28)
Decreasing to 177+/-25 (1.8+/-0.25, 25.6+/-3.6)
Turns ON. Increasing to 216 (2.2, 31) or less
Decreasing to 2,354+/-196 (24+/-2, 341 +/-28)
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
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  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.