|
|
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-521 Judgment Criteria • The event that the output voltage from the fuel tank differential pressure sensor changes by 0.2 . • Engine speed is higher than 2,500 r/min. • Vehicle speed is 15 km/h (9.3 mph) or more. • Volumetric efficiency is 55 percent or more. . OBD-ll DRIVE CYCLE PATTERN − OBD-ll Drive Cycle − Procedure 1 − Evaporative Emission System Leak . TROUBLESHOOTING HINTS • Fuel tank differential pressure sensor failed. • Damaged harness in the fuel tank differential pressure sensor circuit. • ECM <M/T> or PCM <A/T> failed. . OVERVIEW OF TROUBLESHOOTING • DTC P0451 can be set if either of the following conditions occur: 1. Faulty fuel differential pressure sensor, related circuit, or ECM <M/T> or PCM <A/T>. • To check a system blockage, do a performance test which uses a mechanical vacuum gauge and . DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: MUT-III USB Cable • MB991911: MUT-III Main Harness B • MB991658: Test Harness Set • MB991709: Test Harness Set |