2001 INFINITI QX4 Factory Service Manual

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Page 1017 of 2395

INFINITI QX4 2001 Factory Service Manual SEF359Z Component DescriptionNBEC0705Intake valve advance unit position sensors are located in the front cylinder heads in both right/left banks. This sensor uses a Hall IC (element). The cam position

Page 1018 of 2395

INFINITI QX4 2001 Factory Service Manual TERMI- NAL NO.WIRE COLORITEM CONDITION DATA (DC Voltage) 89 ORIntake valve timing control position sen- sors (LH)[Engine is running] IWarm-up condition IIdle speedApproximately 0.5V SEF351Z [Engine is

Page 1019 of 2395

INFINITI QX4 2001 Factory Service Manual Engine speed More than Idle speed Selector lever ªPº or ªNº position 4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº, EC-487. WITH GSTNBEC0710S02Follow the procedure ªWith CONSULT-

Page 1020 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0711RIGHT BANKNBEC0711S01 MEC987C GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1140 (RIGHT, -B1), P1145 (LEFT, -B2) INTAKE VALVE TIMING CONTROL POSITION SENSOR (CIRCUI

Page 1021 of 2395

INFINITI QX4 2001 Factory Service Manual LEFT BANKNBEC0711S02 MEC986C DTC P1140 (RIGHT, -B1), P1145 (LEFT, -B2) INTAKE VALVE TIMING CONTROL POSITION SENSOR (CIRCUIT) Wiring Diagram (Contd) EC-486

Page 1022 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0712 1 RETIGHTEN GROUND SCREWS 1. Turn ignition switch ªOFFº. 2. Loosen and retighten engine ground screws. SEF959Y ©GO TO 2. 2 CHECK INTAKE VALVE TIMING CONTROL POSITION SE

Page 1023 of 2395

INFINITI QX4 2001 Factory Service Manual 3 DETECT MALFUNCTIONING PART Check the following. IHarness connectors M32, F23 IHarness connectors E1, M1 IHarness for open or short between ECM and intake valve timing control position sensor IHarnes

Page 1024 of 2395

INFINITI QX4 2001 Factory Service Manual 7 CHECK IMPROPER INSTALLATION 1. Loosen and retighten the fixing bolt of the intake valve timing control position sensor. 2. Reconnect harness connector disconnected. 3. Perform ªDTC Confirmation Pro
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