2001 INFINITI QX4 Factory Service Manual

Page 1057 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 1058 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 1059 of 2395

INFINITI QX4 2001  Factory Service Manual 10 CHECK CRANKSHAFT POSITION SENSOR (POS)
1. Disconnect crankshaft position sensor (POS) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor

Page 1060 of 2395

INFINITI QX4 2001  Factory Service Manual 13 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E132, E135
IHarness connectors E116, M114
IHarness connectors M32, F23
IHarness for open between harness connector E135 and engin

Page 1061 of 2395

INFINITI QX4 2001  Factory Service Manual On Board Diagnosis LogicNBEC0316This diagnosis detects very small leaks in the EVAP line between
the fuel tank and the EVAP canister purge volume control solenoid
valve using intake manifold vacuum in

Page 1062 of 2395

INFINITI QX4 2001  Factory Service Manual IEVAP purge line rubber tube bent.
IBlocked or bent rubber tube to EVAP control system pressure
sensor
ILoose or disconnected rubber tube
IEVAP canister vent control valve and the circuit
IEVAP canist

Page 1063 of 2395

INFINITI QX4 2001  Factory Service Manual place or refilling/draining fuel until the output voltage condition
of the ªFUEL LEVEL SEº meets within the range above and
leave the vehicle for more than 1 hour. Then start from step 1).
3) Turn i

Page 1064 of 2395

INFINITI QX4 2001  Factory Service Manual Diagnostic ProcedureNBEC0643
1 CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch ªOFFº.
2. Check for genuine NISSAN fuel filler cap design.
SEF915U
OK or NG
OK©GO TO 2.
NG©Replace with genuine