2001 INFINITI QX4 Factory Service Manual

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Page 921 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch ªONº. 2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-II or t

Page 922 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal 84 and EVAP control system pre

Page 923 of 2395

INFINITI QX4 2001 Factory Service Manual 11 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE With CONSULT-II Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions. SEF986Y SEF

Page 924 of 2395

INFINITI QX4 2001 Factory Service Manual 12 CHECK RUBBER TUBE FOR CLOGGING 1. Disconnect rubber tube connected to EVAP canister vent control valve. 2. Check the rubber tube for clogging. OK or NG OK©GO TO 13. NG©Clean the rubber tube using

Page 925 of 2395

INFINITI QX4 2001 Factory Service Manual 14 CHECK EVAP CANISTER VENT CONTROL VALVE With CONSULT-II 1. Perform ªVENT CONTROL/Vº in ªACTIVE TESTº mode. 2. Check air passage continuity and operation delay time under the following conditions

Page 926 of 2395

INFINITI QX4 2001 Factory Service Manual 16 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 927 of 2395

INFINITI QX4 2001 Factory Service Manual 18 CHECK WATER SEPARATOR 1. Check visually for insect nests in the water separator air inlet. 2. Check visually for cracks or flaws in the appearance. 3. Check visually for cracks or flaws in the hose

Page 928 of 2395

INFINITI QX4 2001 Factory Service Manual 21 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
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