2001 INFINITI QX4 Factory Service Manual

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Page 1033 of 2395

INFINITI QX4 2001 Factory Service Manual 6 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE With CONSULT-II 1. Reconnect the disconnected harness connectors. 2. Start engine and let it idle. 3. Remove vacuum hose connected to swirl control v

Page 1034 of 2395

INFINITI QX4 2001 Factory Service Manual Component DescriptionNBEC0286IGNITION COIL & POWER TRANSISTORNBEC0286S01The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns on and off the ign

Page 1035 of 2395

INFINITI QX4 2001 Factory Service Manual Possible CauseNBEC0572IHarness or connectors (The ignition primary circuit is open or shorted.) IPower transistor unit built into ignition coil ICondenser ICrankshaft position sensor (REF) ICrankshaft

Page 1036 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0290 MEC969C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1320 IGNITION SIGNAL Wiring Diagram EC-501

Page 1037 of 2395

INFINITI QX4 2001 Factory Service Manual MEC970C DTC P1320 IGNITION SIGNAL Wiring Diagram (Contd) EC-502

Page 1038 of 2395

INFINITI QX4 2001 Factory Service Manual MEC971C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1320 IGNITION SIGNAL Wiring Diagram (Contd) EC-503

Page 1039 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0291 1 CHECK ENGINE START Turn ignition switch ªOFFº, and restart engine. Is engine running? YesorNo Yes (With CONSULT-II)©GO TO 2. Yes (Without CONSULT- II)©GO TO 12. No©

Page 1040 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II 1. Turn ignition switch OFF. 2. Disconnect condenser harness connector. SEF008Z 3. Turn ignition switch ON. 4. Check voltage between condenser terminal 1
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