2001 INFINITI QX4 Ac system

[x] Cancel search: Ac system

Page 1028 of 2395

INFINITI QX4 2001  Factory Service Manual SEF999Y
Component DescriptionNBEC0532The swirl control valve control vacuum check switch detects
vacuum signal to the swirl control valve, and sends ªONº or ªOFFº
signal to the ECM.
When vacuum is

Page 1046 of 2395

INFINITI QX4 2001  Factory Service Manual On Board Diagnosis LogicNBEC0576Malfunction is detected when
(Malfunction A)120É signal is not entered to ECM for the first few
seconds during engine cranking,
(Malfunction B)120É signal is not ente

Page 1061 of 2395

INFINITI QX4 2001  Factory Service Manual On Board Diagnosis LogicNBEC0316This diagnosis detects very small leaks in the EVAP line between
the fuel tank and the EVAP canister purge volume control solenoid
valve using intake manifold vacuum in

Page 1062 of 2395

INFINITI QX4 2001  Factory Service Manual IEVAP purge line rubber tube bent.
IBlocked or bent rubber tube to EVAP control system pressure
sensor
ILoose or disconnected rubber tube
IEVAP canister vent control valve and the circuit
IEVAP canist

Page 1063 of 2395

INFINITI QX4 2001  Factory Service Manual place or refilling/draining fuel until the output voltage condition
of the ªFUEL LEVEL SEº meets within the range above and
leave the vehicle for more than 1 hour. Then start from step 1).
3) Turn i

Page 1064 of 2395

INFINITI QX4 2001  Factory Service Manual Diagnostic ProcedureNBEC0643
1 CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch ªOFFº.
2. Check for genuine NISSAN fuel filler cap design.
SEF915U
OK or NG
OK©GO TO 2.
NG©Replace with genuine

Page 1065 of 2395

INFINITI QX4 2001  Factory Service Manual 4 CHECK FUEL TANK VACUUM RELIEF VALVE
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
SEF427N
SEF943S
Pressure:
15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 - 2.90 psi)
Vacuum:

Page 1066 of 2395

INFINITI QX4 2001  Factory Service Manual 5 INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.
SEF983Y
SEF916U
NOTE:
Improper installation of the EVAP service