2001 NISSAN ALMERA wiring

Wiring DiagramNJEC1738MODELS WITH INTAKE AIR TEMPERATURE SENSOR
IN MASS AIR FLOW SENSOR
NJEC1738S01
HEC948
INTAKE AIR TEMPERATURE SENSORQG
Wiring Diagram
EC-444

MODELS WITH INTAKE AIR TEMPERATURE SENSOR
ON INTAKE AIR DUCT
NJEC1738S02
NEF330A
INTAKE AIR TEMPERATURE SENSORQG
Wiring Diagram (Cont'd)
EC-445

3 CHECK POWER SUPPLY (Models with intake air temperature sensor in mass air flow sensor)
1. Turn ignition switch ªOFFº.
2. Disconnect mass air flow sensor harness connector.
JEF105Y
3. Turn ignition switch ªONº.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEC503C
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and intake air temperature sensor.
©Repair harness or connectors.
5 CHECK GROUND CIRCUIT
1. Turn ignition switch ªOFFº.
2. Check harness continuity between mass air flow sensor harness connector terminal 3 and engine ground.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 7.
NG©GO TO 6.
6 DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and intake air temperature sensor.
©Repair open circuit or short to ground or short to power in harness or connectors.
INTAKE AIR TEMPERATURE SENSORQG
Diagnostic Procedure (Cont'd)
EC-447

Wiring DiagramNJEC1220SEDAN MODELS AND HATCHBACK MODELS WITH
ECM IN ENGINE COMPARTMENT
NJEC1220S03
HEC851
HEATED OXYGEN SENSOR 1 (FRONT)QG
Wiring Diagram
EC-451

HATCHBACK MODELS WITH ECM IN CABINNJEC1220S04
HEC937
HEATED OXYGEN SENSOR 1 (FRONT)QG
Wiring Diagram (Cont'd)
EC-452

4 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
JEF104Y
3. Disconnect heated oxygen sensor 1 (front) harness connector.
SEF012XA
©GO TO 5.
5 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 50 N´m (4.1 - 5.1 kg-m, 30 - 37 ft-lb)
©GO TO 6.
6 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 62 and heated oxygen sensor 1 (front) harness connector terminal 2.
Refer to wiring diagram.
Continuity should exist.
3. Check harness continuity between ECM terminal 62 (or terminal 2) and ground.
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK©GO TO 7.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
HEATED OXYGEN SENSOR 1 (FRONT)QG
Diagnostic Procedure (Cont'd)
EC-454

Wiring DiagramNJEC1228SEDAN MODELS AND HATCHBACK MODELS WITH
ECM IN ENGINE COMPARTMENT
NJEC1228S03
HEC852
HEATED OXYGEN SENSOR 1 HEATER (FRONT)QG
Wiring Diagram
EC-458

HATCHBACK MODELS WITH ECM IN CABINNJEC1228S04
HEC939
HEATED OXYGEN SENSOR 1 HEATER (FRONT)QG
Wiring Diagram (Cont'd)
EC-459