2001 INFINITI QX4 Factory Service Manual

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Page 729 of 2395

INFINITI QX4 2001 Factory Service Manual SEF332Z DTC Confirmation ProcedureNBEC0090 SEF333Z SEF645Y CAUTION: Always drive vehicle at a safe speed. NOTE: If ªDTC Confirmation Procedureº has been previously conducted, always turn ignition sw

Page 730 of 2395

INFINITI QX4 2001 Factory Service Manual 3) Check the following with engine speed held at 2,000 rpm con- stant under no load. IThe voltage does not remain in the range of 0.2 - 0.4V. 4) If NG, go to ªDiagnostic Procedureº, EC-198. GI MA EM

Page 731 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring Diagram=NBEC0092RIGHT BANKNBEC0092S01 MEC947C DTC P0130, P0150 HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1)/(BANK 2) (CIRCUIT) Wiring Diagram EC-196

Page 732 of 2395

INFINITI QX4 2001 Factory Service Manual LEFT BANKNBEC0092S02 MEC948C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P0130, P0150 HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1)/(BANK 2) (CIRCUIT) Wiring Diagram (Contd) EC-197

Page 733 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0093 1 INSPECTION START 1. Turn ignition switch ªOFFº. 2. Loosen and retighten engine ground screws. SEF959Y 3. Make sure HO2S1 (front) harness protector color, and disconnec

Page 734 of 2395

INFINITI QX4 2001 Factory Service Manual 2 CHECK HO2S1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal and HO2S1 terminal as follows. Refer to Wiring Diagr

Page 735 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK HEATED OXYGEN SENSOR 1 (FRONT) With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select ªMANU TRIGº and adjust ªTRIGGER POINTº to 100% in ªDATA MONITORº

Page 736 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK HEATED OXYGEN SENSOR 1 (FRONT) Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 right signal) or
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