2001 INFINITI QX4 Factory Service Manual

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Page 1113 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK EVAP CANISTER VENT CONTROL VALVE-II With CONSULT-II 1. Turn ignition switch ON. 2. Perform ªVENT CONTROL/Vº in ªACTIVE TESTº mode. 3. Check air passage continuity and operation delay time.

Page 1114 of 2395

INFINITI QX4 2001 Factory Service Manual 5 CHECK VACUUM CUT VALVE 1. Turn ignition switch OFF. 2. Remove vacuum cut valve. 3. Check vacuum cut valve as follows: SEF379Q a. Plug portCandDwith fingers. b. Apply vacuum to portAand check that th

Page 1115 of 2395

INFINITI QX4 2001 Factory Service Manual 8 DETECT MALFUNCTIONING PART Check the following. IEVAP canister for damage IEVAP hose between EVAP canister and water separator for clogging or poor connection ©Repair hose or replace EVAP canister.

Page 1116 of 2395

INFINITI QX4 2001 Factory Service Manual 11 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 1. Remove EVAP control system pressure sensor with its harness connector connected. CAUTION: INever apply force to the air hole protector of the sensor if

Page 1117 of 2395

INFINITI QX4 2001 Factory Service Manual SEF018S Component DescriptionNBEC0632The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the ECM. It consists of

Page 1118 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0640 MEC985C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1464 FUEL LEVEL SENSOR CIRCUIT (GROUND SIGNAL) Wiring Diagram EC-583

Page 1119 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic Procedure=NBEC0641 1 CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch ªOFFº. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM

Page 1120 of 2395

INFINITI QX4 2001 Factory Service Manual SEF485T Description=NBEC0346COMPONENT DESCRIPTIONNBEC0346S01The vacuum cut valve and vacuum cut valve bypass valve are installed in parallel on the EVAP purge line between the fuel tank and the EVAP c
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