2001 INFINITI QX4 change time

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Page 564 of 2395

INFINITI QX4 2001  Factory Service Manual Mixture Ratio Feedback Control (Closed loop control)NBEC0014S04
SEF336WA
The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission con-
trol. The warm-up

Page 596 of 2395

INFINITI QX4 2001  Factory Service Manual The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the

Page 626 of 2395

INFINITI QX4 2001  Factory Service Manual Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
A/F ALPHA-B1 [%]q
IIndicates the mean value of the air-fuel ratio
feedback correction factor per cycle.IWhen the engine is running

Page 628 of 2395

INFINITI QX4 2001  Factory Service Manual DTC Work Support ModeNBEC0034S0802
Test mode Test item Condition Reference page
EVAPORATIVE SYSTEMEVAP SML LEAK P0440
Refer to corresponding
trouble diagnosis for
DTC.EC-352
EVAP VERY SML LEAK P1441 E

Page 657 of 2395

INFINITI QX4 2001  Factory Service Manual SYMPTOM
Reference
section
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING

Page 704 of 2395

INFINITI QX4 2001  Factory Service Manual SEF594K
Component DescriptionNBEC0069The engine coolant temperature sensor is used to detect the
engine coolant temperature. The sensor modifies a voltage signal
from the ECM. The modified signal retu

Page 722 of 2395

INFINITI QX4 2001  Factory Service Manual DescriptionNBEC0081NOTE:
If DTC P0125 is displayed with P0115, first perform the trouble
diagnosis for DTC P0115. Refer to EC-169.
SEF594K
COMPONENT DESCRIPTIONNBEC0081S01The engine coolant temperatur

Page 727 of 2395

INFINITI QX4 2001  Factory Service Manual SEF463R
SEF288D
Component DescriptionNBEC0086The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heate
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