2001 INFINITI QX4 transmission

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Page 703 of 2395

INFINITI QX4 2001  Factory Service Manual 4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E1, M1
IHarness connectors M33, F22
IHarness for open between ECM and intake air temperature sensor
IHarness for open between TCM

Page 708 of 2395

INFINITI QX4 2001  Factory Service Manual 4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors F112, F28
IHarness for open between ECM and engine coolant temperature sensor
IHarness for open between TCM (Transmission Control

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 726 of 2395

INFINITI QX4 2001  Factory Service Manual 4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors F112, F28
IHarness for open between ECM and engine coolant temperature sensor
IHarness for open between TCM (Transmission Control

Page 921 of 2395

INFINITI QX4 2001  Factory Service Manual 4 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ªONº.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-II or t

Page 965 of 2395

INFINITI QX4 2001  Factory Service Manual 10 CHECK IACV-AAC VALVE-II
1. Reconnect IACV-AAC valve harness connector and ECM harness connector.
2. Turn ignition switch ªONº and ªOFFº, and ensure the IACV-AAC valve makes operating sound acco

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 978 of 2395

INFINITI QX4 2001  Factory Service Manual Diagnostic ProcedureNBEC0270
1 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connec