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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-501 TERMINAL NO. INSPECTION INSPECTION CONDITION (ENGINE NORMAL 1 No.1 injector • Engine: warming up, idling • Suddenly depress the accelerator pedal From 11 − 14 V momentarily 9 No.2 injector 24 No.3 injector 2 No.4 injector 10 No.5 injector 25 No.6 injector 3 Left bank heated Engine: warming up, idling 9 − 11 V Engine: Revving 9 − 11 V → B+ (momentarily) 4 Right bank heated Engine: warming up, idling 9 − 11 V Engine: Revving B+ 6 EGR solenoid Ignition switch: "ON" B+ • Engine: idling • Suddenly depress the accelerator pedal. From B+ , drops 8 Generator G • Engine: warming up, idling (radiator fan: • Headlight: OFF to ON • Rear defogger switch: OFF to ON • Stop light switch: OFF to ON Voltage rises by − 3.5 V 54 Generator FR • Engine: warming up, idling (radiator fan: • Headlight: OFF to ON • Rear defogger switch: OFF to ON • Stop light switch: OFF to ON Voltage drops 11 Ignition power Engine: 3,000 r/min 0.3 − 3.0 V 14 Stepper motor coil • Engine: warming up, idling • A/C switch: OFF → ON • Headlight switch: OFF → ON B+ ⇔ 1 V or less (changes 28 Stepper motor coil 15 Stepper motor coil 29 Stepper motor coil 18 Fan controller Radiator fan and A/C condenser fan are not 0 − 0.3V Radiator fan and A/C condenser fan are 0.7 V or more 19 Volume air flow Engine: idling 0 − 1 V Engine: 3,000 r/min 6 − 9 V 21 Fuel pump relay Ignition switch: "ON" B+ Engine: idling 0 − 3V |