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8 CHECK VACUUM HOSES AND TUBES 1. Disconnect vacuum hoses between the air control valve (Power steering) and vacuum port, air control valve (Power steering) and air duct. 2. Check hoses and tubes for cracks, clogging, improper connection or disconnection. SEF109L OK or NG OK © GO TO 9. NG © Repair hoses or tubes. 9 CHECK IACV-AAC VALVE Refer to “Component Inspection”, EC-474. OK or NG OK © GO TO 11. NG © GO TO 10. 10 REPLACE IACV-AAC VALVE 1. Replace IACV-AAC valve assembly. Is the result CMPLT or INCMP? CMPLT or INCMP CMPLT © INSPECTION END INCMP © Follow the construction of “Idle Air Volume Learning”. 11 CHECK TARGET IDLE SPEED 1. Turn ignition switch “OFF”. + For M/T models, drive vehicle for 10 minutes. 5. Stop vehicle with engine running. 700 ± 50 rpm OK or NG OK © GO TO 12. NG © Perform “Idle Air Volume Learning”, EC-57. 12 CHECK INTERMITTENT INCIDENT Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145. © INSPECTION END IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC) VALVE QG18DE Diagnostic Procedure (Cont’d) EC-473 |