2001 INFINITI QX4 Factory Service Manual

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Page 1089 of 2395

INFINITI QX4 2001 Factory Service Manual Possible CauseNBEC0589IEVAP canister vent control valve IEVAP control system pressure sensor and the circuit IBlocked rubber tube to EVAP canister vent control valve IWater separator IEVAP canister is

Page 1090 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0331 MEC963C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1446 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL VALVE (CLOSE) Wiring Diagram EC-555

Page 1091 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0332 1 CHECK RUBBER TUBE 1. Turn ignition switch ªOFFº. 2. Disconnect rubber tube connected to EVAP canister vent control valve. 3. Check the rubber tube for clogging. SEF143

Page 1092 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK EVAP CANISTER VENT CONTROL VALVE-I 1. Remove EVAP canister vent control valve from EVAP canister. 2. Check portionBof EVAP canister vent control valve for being rusted. SEF337X OK or NG OK©GO

Page 1093 of 2395

INFINITI QX4 2001 Factory Service Manual 5 CHECK EVAP CANISTER VENT CONTROL VALVE-III 1. Clean the air passage (PortionAtoB) of EVAP canister vent control valve using an air blower. 2. Perform the procedure 4 again. OK or NG OK©GO TO 6. NG

Page 1094 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR 1. Disconnect EVAP control system pressure sensor harness connector. SEF495R 2. Check connectors for water. Water should not exist. OK or NG OK©

Page 1095 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 1096 of 2395

INFINITI QX4 2001 Factory Service Manual System DescriptionNBEC0333NOTE: If DTC P1447 is displayed with P0510, perform trouble diagnosis for DTC P0510 first. (See EC-431.) SEF373Z In this evaporative emission (EVAP) control system, purge flo
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