Tacoma 2WD V6-3.4L (5VZ-FE) (1995)
Idle Up Control Valve: Component Tests and General Diagnostics
1. REMOVE A/C IDLE-UP VALVE.
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Disconnect the idle-up valve connector.
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Disconnect the 2 air hoses.
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Remove the 2 bolts and idle-up valve.
2. INSPECT A/C IDLE-UP VALVE.
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Inspect idle-up valve for open circuit
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Using an ohmmeter, check that there is continuity between the terminals.
Resistance at 20°C (68° F): 30 - 34 0hms
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If there is no continuity, replace the idle-up valve.
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Inspect A/C idle-up valve for ground.
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Using an ohmmeter, check that there is no continuity between each terminal and the body.
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If there is continuity, replace the idle-up valve.
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Inspect A/C idle-up valve operation.
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Check that air does not flow from port E to port F.
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Apply battery positive voltage across the terminals.