5. FUEL INJECTION SYSTEM MOVIE S 150i AIR IDLE BYPASS VALVE INSPECTION Connecting the Fi diagnostic tool to enter the data analysis. Check the ISC motor if the function is normal. ELECTRONIC CONTROL UNIT (ECU) REMOVAL 1. Remove the front cover 2. Remove the ECU protector 3. Remove the connector of ECU 4. Remove the ECU Do not disconnect or connect the ECU connector during the ignition switch "ON"; it may cause the ECU damage. The throttle position sensor (TPS) and idle air bypass valve (ISC) have to reset when the throttle body MAP, TPS, ISC or ECU has been reinstalled. Battery connected and Key On, without pulling off or connect on ECU (incl. cutting and connecting) 1. Confirm Key Off status 2. Replace with a new ECU 3. Key On and perform Idle and full open ECU the throttle Position (TPI) for twice learning. 4. Warming at Idle for 15 minutes. Throttle valve body is deposited with dirt and unable to replace or clean: (Suggested to replace with new ECU at the time of cleaning throttle valve body) 1. Confirm at Key Off status 2. Replace ECU 3. Key On and perform 2 to 3 times of TPI Idle and Fully Open learning (telling ECU the present setting of Throttle) 4. Warming up for 15 minutes at Idle for ECU's connector automatic learning of ABV (Telling ECU the compensating volume of bypass air 5. APC learning, large and small circulation. (Telling ECU engine compensation) 5-30