2001 INFINITI QX4 Factory Service Manual

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Page 1177 of 2395

INFINITI QX4 2001 Factory Service Manual 3 DETECT MALFUNCTIONING PART Check the following. IHarness connectors E1, M1 IHarness for open or short between ECM and refrigerant pressure sensor ©Repair harness or connectors. 4 CHECK REFRIGERANT

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INFINITI QX4 2001 Factory Service Manual ECM Terminals and Reference ValueNBEC0690Specification data are reference values and are measured between each terminal and ground. CAUTION: Do not use ECM ground terminals when measuring input/output

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INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0604 MEC421D ELECTRICAL LOAD SIGNAL Wiring Diagram EC-644

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INFINITI QX4 2001 Factory Service Manual Diagnostic ProcedureNBEC0605 1 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I 1. Turn ignition switch ªONº. 2. Check voltage between ECM terminal 52 and ground under the following conditions. SEF610X

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INFINITI QX4 2001 Factory Service Manual 4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT 1. Stop engine. 2. Disconnect ECM harness connector. 3. Disconnect rear window defogger relay. 4. Check harness continuity between E

Page 1182 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT 1. Stop engine. 2. Disconnect ECM harness connector. 3. Disconnect headlamp LH relay. 4. Check harness continuity between ECM terminal 52 and he

Page 1183 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring DiagramNBEC0407 MEC978C MIL & DATA LINK CONNECTORS Wiring Diagram EC-648

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INFINITI QX4 2001 Factory Service Manual Fuel Pressure RegulatorNBEC0408 Fuel pressure at idling kPa (kg/cm2, psi) Vacuum hose is connected. Approximately 235 (2.4, 34) Vacuum hose is disconnected. Approximately 294 (3.0, 43) Idle Speed and
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