2001 INFINITI QX4 Factory Service Manual

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Page 969 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring Diagram=NBEC0262 MEC967C DTC P0510 CLOSED THROTTLE POSITION SWITCH Wiring Diagram EC-434

Page 970 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0263 1 CHECK CLOSED THROTTLE POSITION SWITCH POWER SUPPLY CIRCUIT 1. Turn ignition switch ªOFFº. 2. Disconnect throttle position switch harness connector. SEF944Y 3. Turn ign

Page 971 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK IGNITION TIMING AND ENGINE IDLE SPEED Check the following items. Refer to ªBasic Inspectionº, EC-101. MTBL0656 Models with CONSULT-II©GO TO 6. Models without CON- SULT-II©GO TO 6. 5 CHECK

Page 972 of 2395

INFINITI QX4 2001 Factory Service Manual 6 CHECK THROTTLE POSITION SWITCH 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch ªOFFº. 3. Remove vacuum hose connected to throttle opener. 4. Connect suitabl

Page 973 of 2395

INFINITI QX4 2001 Factory Service Manual 7 ADJUST THROTTLE POSITION SWITCH Check the following items. Refer to ªBasic Inspectionº, EC-101. MTBL0655 Is it possible to adjust closed throttle position switch? YesorNo Yes (With CONSULT-II)©GO

Page 974 of 2395

INFINITI QX4 2001 Factory Service Manual 9 CHECK THROTTLE POSITION SENSOR 1. Start engine and warm it up to normal operating temperature. 2. Stop engine (ignition switch OFF). 3. Remove the vacuum hose connected to the throttle opener. 4. Co

Page 975 of 2395

INFINITI QX4 2001 Factory Service Manual System DescriptionNBEC0264This circuit line (LAN) is used to control the smooth shifting up and down of A/T during the hard acceleration/ deceleration. Pulse signals are exchanged between ECM and TCM

Page 976 of 2395

INFINITI QX4 2001 Factory Service Manual 2) Select ªDATA MONITORº mode with CONSULT-II. 3) Start engine and let it idle for at least 2 seconds. 4) If DTC is detected, go to ªDiagnostic Procedureº, EC-443. GI MA EM LC FE AT TF PD AX SU BR
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