2001 INFINITI QX4 Factory Service Manual

Page 1049 of 2395

INFINITI QX4 2001  Factory Service Manual Diagnostic ProcedureNBEC0580
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF959Y
©GO TO 2.
2 CHECK CKPS (REF) INPUT SIGNAL CIRCUIT FOR OPE

Page 1050 of 2395

INFINITI QX4 2001  Factory Service Manual 4 CHECK CKPS (REF) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Check harness continuity between CKPS (REF) terminal 1 and engine ground.
Continuity should exist.
3. Also chec

Page 1051 of 2395

INFINITI QX4 2001  Factory Service Manual 8 CHECK CKPS (REF) SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect harness connectors E132, E135.
3. Check harness continuity between harness connector E135 terminal 7

Page 1052 of 2395

INFINITI QX4 2001  Factory Service Manual SEF977Y
Component DescriptionNBEC0292The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects
the crankshaft position sign

Page 1053 of 2395

INFINITI QX4 2001  Factory Service Manual ECM Terminals and Reference Value=NBEC0677Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/outpu

Page 1054 of 2395

INFINITI QX4 2001  Factory Service Manual DTC Confirmation ProcedureNBEC0295NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 10 seconds
before conducting the next tes

Page 1055 of 2395

INFINITI QX4 2001  Factory Service Manual Wiring DiagramNBEC0296
MEC959C
DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS) (COG)
Wiring Diagram
EC-520

Page 1056 of 2395

INFINITI QX4 2001  Factory Service Manual Diagnostic ProcedureNBEC0297
1 RETIGHTEN GROUND SCERWS
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