2001 INFINITI QX4 Factory Service Manual

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Page 713 of 2395

INFINITI QX4 2001 Factory Service Manual SEF174Z 8) Select ªAUTO TRIGº in ªDATA MONITORº mode with CON- SULT-II. SEF178Y 9) Maintain the following conditions for at least 10 consecutive seconds. ENG SPEED More than 2,000 rpm MAS A/F SE-B

Page 714 of 2395

INFINITI QX4 2001 Factory Service Manual SEF305X With GST=NBEC0078S03021) Start engine and warm it up to normal operating temperature. 2) Maintain the following conditions for at least 10 consecutive seconds. Gear position Suitable position

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INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0079 MEC946C DTC P0120 THROTTLE POSITION SENSOR Wiring Diagram EC-180

Page 716 of 2395

INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0080 1 INSPECTION START Which malfunction A, B or C is duplicated? MTBL0066 TypeA,BorC TypeAor B©GO TO 4. Type C©GO TO 2. 2 ADJUST THROTTLE POSITION SENSOR Check the followin

Page 717 of 2395

INFINITI QX4 2001 Factory Service Manual 5 CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT 1. Disconnect throttle position sensor harness connector. SEF944Y 2. Turn ignition switch ªONº. 3. Check voltage between throttle position senso

Page 718 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal 91 and throttle position sensor terminal

Page 719 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK THROTTLE POSITION SENSOR Without CONSULT-II 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 th

Page 720 of 2395

INFINITI QX4 2001 Factory Service Manual 12 CHECK MASS AIR FLOW SENSOR 1. Reconnect harness connectors disconneted. 2. Start engine and warm it up to normal operating temperature. 3. Check voltage between ECM terminal 61 (Mass air flow senso
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