2001 INFINITI QX4 Factory Service Manual

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Page 1009 of 2395

INFINITI QX4 2001 Factory Service Manual 14 CHECK CRANKSHAFT POSITION SENSOR (REF)-I 1. Turn ignition switch ªOFFº. 2. Loosen the fixing bolts and remove the CKPS (REF). 3. Visually check the CKPS (REF) for chipping. SEF585P OK or NG OK©G

Page 1010 of 2395

INFINITI QX4 2001 Factory Service Manual 2 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT With CONSULT-II 1. Turn ignition switch ªOFFº. 2. Select ªSWIRL CONT SOL VALVEº in ªACTIVE TESTº mode with CONSULT-II. 3. Touch ªONº

Page 1011 of 2395

INFINITI QX4 2001 Factory Service Manual 4 DETECT MALFUNCTIONING PART Check the following. IHarness connectors M32, F23 I15A fuse IHarness for open or short between swirl control valve control solenoid valve and fuse ©Repair harness or conn

Page 1012 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 1013 of 2395

INFINITI QX4 2001 Factory Service Manual 8 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 1014 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK CRANKSHAFT POSITION SENSOR (REF)-II Check resistance between CKPS (REF) terminals 1 and 2. SEF350X OK or NG OK (With CONSULT-II)©GO TO 11. OK (Without CONSULT- II)©GO TO 12. NG©Replace cra

Page 1015 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 1016 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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