Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA1995T100 DX, RWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - 2.7LIDLE CONTROL SYSTEMA/C IDLE-UP VALVE

1995 Toyota T100 DX, RWD, Standard

A/C Idle-Up Valve

1995 Toyota T100 DX, RWD, StandardSECTION A/C Idle-Up Valve

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 illustration in the THEORY/OPERATION - 2.7L article or wire color. See wiring diagram in the WIRING DIAGRAMS article.

A/C IDLE-UP VALVE LOCATIONS

Application	Valve Location
4-Cyl.	Passenger's Side Rear Corner Of Engine, Near Air Intake & Contains 2-Pin Black Connector

Using ohmmeter, check resistance between A/C idle-up valve electrical terminals. Replace A/C idle-up valve if resistance is within specification. See A/C IDLE-UP VALVE RESISTANCE SPECIFICATIONS table.

A/C IDLE-UP VALVE RESISTANCE SPECIFICATIONS

Application	Ohms @ 68°F (20°C)
T100	30-34

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 Fig 1. Replace A/C idle-up valve if defective.

Fig 1: Testing Typical A/C Idle-Up Valve

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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When to See a Mechanic

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

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.