toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

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EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Diagram Information and Instructions|Page 1529

Corolla Wagon 2WD L4-96.8 1587cc 1.6L DOHC (4A-FE) (1989)

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Idle Up Control Valve: Description and Operation

Air Control Valve (ACV)

    Whenever the ECU senses a load from the A/C compressor, the Air Control Valve (ACV) is activated to increase base idle speed.  The ACV is a
calibrated air bleed around the throttle valve and feeds air to the engine through vacuum hoses.  The ACV inputs the ECU through terminal V-ISC.

EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Diagram Information and Instructions|Page 1529