INFINITI QX4 2001 Factory Service Manual

INFINITI QX4 2001 Factory Service Manual QX4 2001 INFINITI INFINITI https://www.carmanualsonline.info/img/42/57027/w960_57027-0.png INFINITI QX4 2001 Factory Service Manual
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INFINITI QX4 2001  Factory Service Manual 4) Make sure that A/C switch is ªOFFº and air conditioner is not
operating. If NG, check air conditioner circuit. Refer to HA-35
or HA-30, ªTROUBLE DIAGNOSESº. After repair, go to the
next step.
5

Page 852 of 2395

INFINITI QX4 2001  Factory Service Manual 2 DETECT MALFUNCTIONING PART
Check the following for leak.
IHose
IRadiator
IWater pump (Refer to LC-12, ªWater Pumpº.)
©Repair or replace.
3 CHECK RADIATOR CAP
Apply pressure to cap with a tester a

Page 853 of 2395

INFINITI QX4 2001  Factory Service Manual 5 CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Remove engine coolant temperature sensor.
2. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
SEF304X
O

Page 854 of 2395

INFINITI QX4 2001  Factory Service Manual Main 12 Causes of OverheatingNBEC0615
Engine Step Inspection item Equipment Standard Reference page
OFF 1IBlocked radiator
IBlocked condenser
IBlocked radiator grille
IBlocked bumperIVisual No blockin

Page 855 of 2395

INFINITI QX4 2001  Factory Service Manual On Board Diagnosis LogicNBEC0182When a misfire occurs, engine speed will fluctuate. If the engine
speed fluctuates enough to cause the CKP sensor signal to vary,
ECM can determine that a misfire is oc

Page 856 of 2395

INFINITI QX4 2001  Factory Service Manual SEF213Y
DTC Confirmation ProcedureNBEC0183CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and

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 (

Page 860 of 2395

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
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