2001 INFINITI QX4 Factory Service Manual

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Page 873 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0196 1 RETIGHTEN GROUND SCREWS 1. Turn ignition switch ªOFFº. 2. Loosen and retighten engine ground screws. SEF959Y ©GO TO 2. 2 CHECK CKPS (POS) POWER SUPPLY CIRCUIT 1. Disc

Page 874 of 2395

INFINITI QX4 2001 Factory Service Manual 3 DETECT MALFUNCTIONING PART Check the following. IHarness connectors E132, E135 IHarness for open or short between ECM and crankshaft position sensor (POS) IHarness for open or short between ECM rela

Page 875 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK CKPS (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT 1. Disconnect CKPS (POS) harness connector. SEF980Y 2. Check harness continuity between CKPS (POS) terminals and harness connector E132 termin

Page 876 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK CRANKSHAFT POSITION SENSOR (POS)-II 1. Reconnect disconnected harness connectors. 2. Turn ignition switch ªONº. 3. Check voltage between ECM terminal 85 and ground by briefly touching the s

Page 877 of 2395

INFINITI QX4 2001 Factory Service Manual SEF252P Component DescriptionNBEC0197The camshaft position sensor (PHASE) is located on the engine front cover facing the camshaft sprocket. It detects the cylinder No. signal. The sensor consists of

Page 878 of 2395

INFINITI QX4 2001 Factory Service Manual Possible CauseNBEC0494IHarness or connectors [The camshaft position sensor (PHASE) circuit is open or shorted.] ICamshaft position sensor (PHASE) IStarter motor (Refer to SC section.) IStarting system

Page 879 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0201 MEC961C DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE) Wiring Diagram EC-344

Page 880 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0202 1 CHECK STARTING SYSTEM Turn ignition switch to ªSTARTº position. Does the engine turn over? Does the starter motor operate? YesorNo Ye s©GO TO 2. No©Check starting sy
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