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Home >> Toyota >> 1994 >> T100 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> A/C Idle-Up Valve >> 2.7L
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A/C Idle-Up Valve: 2.7L

  1. Remove A/C idle-up valve. See A/C IDLE-UP VALVE LOCATIONS  table.
    NOTE: The A/C idle-up valve may also be identified using appropriate illustration in THEORY/OPERATION article or wire color. See appropriate wiring diagram in WIRING DIAGRAMS article.
    A/C IDLE-UP VALVE LOCATIONS

    Application Location
    T100 2.7L Near Firewall On Passenger's Side
  2. Using ohmmeter, check resistance between A/C idle-up valve electrical terminals. Replace A/C idle-up valve if resistance is not 30-34 ohms.
  3. Ensure no continuity exists between each electrical terminal and body of A/C idle-up valve. To check A/C idle-up valve operation, apply air pressure to designated area and checking air passage, and then applying battery voltage and ground and retesting. See Figure. Replace A/C idle-up valve if defective.
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