2001 INFINITI QX4 Factory Service Manual

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Page 857 of 2395

INFINITI QX4 2001 Factory Service Manual 3 PERFORM POWER BALANCE TEST With CONSULT-II 1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode. SEF190Y 2. Is there any cylinder which does not produce a momentary engine speed drop? Without CONSUL

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INFINITI QX4 2001 Factory Service Manual 5 CHECK IGNITION SPARK 1. Disconnect ignition wire from spark plug. 2. Connect a known good spark plug to the ignition wire. 3. Place end of spark plug against a suitable ground and crank engine. 4. C

Page 859 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK FUEL PRESSURE 1. Install all removed parts. 2. Release fuel pressure to zero. Refer to EC-39. 3. Install fuel pressure gauge and check fuel pressure. Refer to EC-39. At idle: Approx. 235 kPa (

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INFINITI QX4 2001 Factory Service Manual 11 CHECK HEATED OXYGEN SENSOR 1 (FRONT) With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select ªMANU TRIGº and ªHI SPEEDº in ªDATA MONITORº mode with CONSULT-I

Page 861 of 2395

INFINITI QX4 2001 Factory Service Manual 12 CHECK HEATED OXYGEN SENSOR 1 (FRONT) Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 right signal) o

Page 862 of 2395

INFINITI QX4 2001 Factory Service Manual 14 CHECK MASS AIR FLOW SENSOR With CONSULT-II Check mass air flow sensor signal in ªDATA MONITORº mode with CONSULT-II. 2.0 - 6.0 g´m/sec: at idling 7.0 - 20.0 g´m/sec: at 2,500 rpm With GST Check

Page 863 of 2395

INFINITI QX4 2001 Factory Service Manual SEF332I Component DescriptionNBEC0185The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed

Page 864 of 2395

INFINITI QX4 2001 Factory Service Manual WITH CONSULT-IINBEC0188S011) Turn ignition switch ªONº and select ªDATA MONITORº mode with CONSULT-II 2) Start engine and run it for at least 5 seconds at idle speed. 3) If DTC is detected, go to
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