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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-925 DTC SET CONDITIONS <Range/Performance problem -relation between main and sub> Logic Flow Chart . Check Conditions • Ignition switch is "ON" position. • Throttle position sensor (main) output voltage is between 2.5 and 4.8 volts. • Throttle position sensor (sub) output voltage is higher than 2.25 volts. Judgement Criteria • Throttle position sensor (sub) output voltage is 4.2 volts or lower. . OBD-II DRIVE CYCLE PATTERN − OBD-II Drive Cycle − Procedure 6 . . TROUBLESHOOTING HINTS (The most likely • Throttle position sensor failed. • Shorted throttle position sensor circuit or connec- tor damage. • PCM failed. DIAGNOSIS Required Special Tools: • MB991958: Scan tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A START END NO NO NO YES YES YES MALFUNCTION GOOD CONTINUOUS FAILURE FOR 0.5sec TPS (SUB) < =4.2V MONITORING CONDITIONS AK302392 |