13. FUEL INJECTION SYSTEM MXU500i Screw T-MAP sensor DISASSEMBLY Remove the screws and then remove the ISC . Remove the screw.. Remove the T-MAP sensor. Remove the screw and then remove the TPS. ASSEMBLY Screws ISC The throttle position sensor (TPS) and idle air bypass valve (ISC) have to reset when TPS the throttle body T-MAP sensor, TPS, ISC or ECU has been reinstalled. Screw ISC TPS Apply oil onto a new O-ring. When install the TPS onto the throttle body, being careful not to damage the O-ring. Install and tighten the screw securely. T-MAP sensor 22-27