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Home >> Acura >> 1991 >> Legend Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Electronic Air Control Valve (EACV) System
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Electronic Air Control Valve (EACV) System

Idle speed is controlled by EACV and fast idle valve. EACV valve changes amount of air by-passing into intake manifold. EACV responds to changes received by ECU from various sensor and signal sources.

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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