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Home >> Acura >> 1991 >> Legend Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Fast Idle Valve
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Fast Idle Valve

Fast idle valve opens an air passage, which by-passes throttle plate. This allows more air for a fast idle speed. Coolant warms valve and closes air passage. Ensure fast idle valve is closed when engine is at operating temperature.

NOTE: The following tests can only be performed with PGM-FI Test Harness (07LAJ-PT3010A ). Terminals on PGM-FI test harness connectors match terminals on ECU and ECU connectors. This allows the technician to test continuity of specified wires and resistance of devices when the ECU is disconnected. When ECU is connected to PGM-FI test harness, sensor input values can be monitored (at the test connector terminals) while engine is in operation. To identify ECU terminals, See Figure . ECU connectors are identified as "A", "B", "C" and "D" on harness.
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