2001 NISSAN ALMERA Service Manual

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Page 1401 of 2898

NISSAN ALMERA 2001 Service Manual Diagnostic ProcedureNJEC0648 1 CHECK MAFS POWER SUPPLY CIRCUIT 1. Turn ignition switch ªOFFº. 2. Disconnect mass air flow sensor harness connector. SEF884Y 3. Turn ignition switch ªONº. 4. Check v

Page 1402 of 2898

NISSAN ALMERA 2001 Service Manual 3 CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch ªOFFº. 2. Loosen and retighten engine ground screws. SEF380Y 3. Check harness continuity between mass air flow sensor terminal

Page 1403 of 2898

NISSAN ALMERA 2001 Service Manual 6 CHECK MASS AIR FLOW SENSOR 1. Reconnect harness connectors disconnected. 2. Start engine and warm it up to normal operating temperature. 3. Check voltage between ECM terminal 224 (Mass air flow sens

Page 1404 of 2898

NISSAN ALMERA 2001 Service Manual SEF594K DescriptionNJEC0649The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the

Page 1405 of 2898

NISSAN ALMERA 2001 Service Manual 3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with ECM. 4) If DTC is detected, go to ªDiagnostic Procedureº, EC-683. DTC P0115 COOLANT TEMP SENYD DTC Confirmation Procedure (Cont

Page 1406 of 2898

NISSAN ALMERA 2001 Service Manual Wiring DiagramNJEC0652 HEC823 DTC P0115 COOLANT TEMP SENYD Wiring Diagram EC-682

Page 1407 of 2898

NISSAN ALMERA 2001 Service Manual Diagnostic ProcedureNJEC0653 1 CHECK ECTS POWER SUPPLY CIRCUIT 1. Turn ignition switch ªOFFº. 2. Disconnect engine coolant temperature sensor harness connector. SEF382Y 3. Turn ignition switch ªON

Page 1408 of 2898

NISSAN ALMERA 2001 Service Manual 4 CHECK ENGINE COOLANT TEMPERATURE SENSOR 1. Remove engine coolant temperature sensor from the engine. 2. Check resistance between ECTS terminals 1 and 2 as shown in the figure. SEF304X OK or NG OK©G
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