2001 INFINITI QX4 Factory Service Manual

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Page 1001 of 2395

INFINITI QX4 2001 Factory Service Manual PROCEDURE BNBEC0530S02 1 CHECK INTAKE SYSTEM 1. Start engine and let it idle. 2. Check intake air system for air leaks. OK or NG OK (With CONSULT-II)©GO TO 2. OK (Without CONSULT- II)©GO TO 3. NG©R

Page 1002 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT 1. Turn ignition switch ªOFFº. 2. Disconnect swirl control valve control solenoid valve harness connector. SEF002Z 3. Turn ign

Page 1003 of 2395

INFINITI QX4 2001 Factory Service Manual 6 CHECK HOSES Check hoses and tubes between intake manifold, and swirl control valve actuator for crack, clogging, improper connection or disconnection. SEF109L OK or NG OK©GO TO 7. NG©Repair hoses

Page 1004 of 2395

INFINITI QX4 2001 Factory Service Manual 7 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 1005 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK SWIRL CONTROL VALVE ACTUATOR With CONSULT-II 1. Reconnect vacuum hose between swirl control valve actuator and swirl control valve control solenoid valve. 2. Start engine and let it idle. 3. S

Page 1006 of 2395

INFINITI QX4 2001 Factory Service Manual 9 CHECK SWIRL CONTROL VALVE CONTROL VACUUM CHECK SWITCH 1. Turn ignition switch ªOFFº. 2. Disconnect vacuum hose connected to swirl control valve control vacuum check switch. 3. Attach vacuum pump t

Page 1007 of 2395

INFINITI QX4 2001 Factory Service Manual 11 CHECK THROTTLE POSITION SENSOR With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Stop engine (ignition switch OFF). 3. Remove the vacuum hose connected to the throt

Page 1008 of 2395

INFINITI QX4 2001 Factory Service Manual 12 CHECK THROTTLE POSITION SENSOR Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Stop engine (ignition switch OFF). 3. Remove the vacuum hose connected to the th
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