{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"FI","section_name":"EFI System","page":106,"pages_in_section":126,"title":"Idle Speed Control (ISC) Valve","section_header":"EFI System — Air Induction System","ocr_text":"Idle Speed Control (ISC) Valve\n\n[DIAGRAM showing Rotor, Coil, Valve Shaft, Valve components and electrical schematic with S1, B1, S3, R2, S2, S4 connections to Rotor]\n\nCHECK FOR OPERATING SOUND FROM ISC VALVE\n\nCheck that there is a clicking sound immediately after stopping the engine.\n\n[DIAGRAM F16216 showing hand checking ISC valve with ear symbol]\n\nREMOVAL OF ISC VALVE\n\n1. DRAIN COOLANT\n\n2. DISCONNECT ISC VALVE CONNECTOR\n\n3. DISCONNECT NO.2 WATER BY-PASS HOSE AND AIR HOSE\n\n[DIAGRAM F16217 showing disconnection of hoses]\n\n4. REMOVE ISC VALVE\n(a) Remove the two bolts, ISC valve and gasket.\n(b) Disconnect the No.1 water by-pass hose from the ISC valve.\n(c) (7M-GTE)\nRemove the seal washer and check valve from the air intake chamber.\n\n[DIAGRAM F16218 showing ISC valve 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}