2001 INFINITI QX4 Factory Service Manual

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Page 1041 of 2395

INFINITI QX4 2001 Factory Service Manual 6 DETECT MALFUNCTIONING PART Check the following. IHarness connectors E1, M1 and M33, F22 IHarness for open or short between ECM relay and condenser ©Repair open circuit or short to ground or short t

Page 1042 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Check harness continuity between condenser terminal 2 and engine ground. Refer to Wiring Diagram. Continuity should

Page 1043 of 2395

INFINITI QX4 2001 Factory Service Manual 12 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V 1. Turn ignition switch OFF. 2. Reconnect harness connectors disconnected. 3. Disconnect ignition coil harness connector. SEF975Y 4. Turn ignition switch

Page 1044 of 2395

INFINITI QX4 2001 Factory Service Manual 15 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminals 21, 22, 23, 30, 31, 32 and ignition coil terminal

Page 1045 of 2395

INFINITI QX4 2001 Factory Service Manual SEF253P Component DescriptionNBEC0573The crankshaft position sensor (REF) is located on the oil pan (upper) facing the crankshaft pulley. It detects the TDC (Top Dead Center) signal (120É signal). Th

Page 1046 of 2395

INFINITI QX4 2001 Factory Service Manual On Board Diagnosis LogicNBEC0576Malfunction is detected when (Malfunction A)120É signal is not entered to ECM for the first few seconds during engine cranking, (Malfunction B)120É signal is not ente

Page 1047 of 2395

INFINITI QX4 2001 Factory Service Manual SEF058Y PROCEDURE FOR MALFUNCTION B AND CNBEC0578S02With CONSULT-IINBEC0578S02011) Turn ignition switch ªONº. 2) Select ªDATA MONITORº mode with CONSULT-II. 3) Start engine and run it for at least

Page 1048 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0579 MEC960C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS) (REF) Wiring Diagram EC-513
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