2001 NISSAN ALMERA TINO wiring diagram

MODELS WITH ECM IN CABINNLEC1786S04
YEC931
HEATED OXYGEN SENSOR 1 (FRONT)SR20DE
Wiring Diagram (Cont'd)
EC-946

4 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF202X
3. Disconnect heated oxygen sensor 1 (HO2S1) (front) harness connector.
SEF774Z
©GO TO 5.
5 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N´m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
©GO TO 6.
6 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 62 and HO2S1 terminal 2.
Refer to wiring diagram.
Continuity should exist.
3. Check harness continuity between ECM terminal 62 (or HO2S1 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)SR20DE
Diagnostic Procedure (Cont'd)
EC-948

Wiring DiagramNLEC1794MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1794S03
YEC745
HEATED OXYGEN SENSOR 1 HEATER (FRONT)SR20DE
Wiring Diagram
EC-952

MODELS WITH ECM IN CABINNLEC1794S04
YEC932
HEATED OXYGEN SENSOR 1 HEATER (FRONT)SR20DE
Wiring Diagram (Cont'd)
EC-953

3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F38, M50 (where fitted)
+Harness connectors M72, F44 (where fitted)
+10A fuse
+Harness for open or short between heated oxygen sensor 1 (front) and fuse
©Repair harness or connectors.
4 CHECK GROUND CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S1 terminal 3 and ECM terminal 4.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)
Refer to ªComponent Inspectionº, EC-955.
OK or NG
OK©GO TO 6.
NG©Replace heated oxygen sensor 1 (front).
6 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF935X
Component InspectionNLEC1796HEATED OXYGEN SENSOR 1 HEATER (FRONT)NLEC1796S01Check resistance between terminals 3 and 1.
Resistance: 2.3 - 4.3Wat 25ÉC (77ÉF)
Check continuity between terminals 2 and 1, 3 and 2.
Continuity should not exist.
If NG, replace the heated oxygen sensor 1 (front).
CAUTION:
+Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 1 HEATER (FRONT)SR20DE
Diagnostic Procedure (Cont'd)
EC-955

Wiring DiagramNLEC1800MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1800S03
YEC746
HEATED OXYGEN SENSOR 2 (REAR)SR20DE
Wiring Diagram
EC-957

MODELS WITH ECM IN CABINNLEC1800S04
YEC933
HEATED OXYGEN SENSOR 2 (REAR)SR20DE
Wiring Diagram (Cont'd)
EC-958

3 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF202X
©GO TO 4.
4 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect heated oxygen sensor 2 (HO2S2) (rear) harness connector and ECM harness connector.
SEF639Z
3. Check harness continuity between ECM terminal 63 and HO2S2 terminal 1.
Refer to wiring diagram.
Continuity should exist.
4. Check harness continuity between ECM terminal 63 (or HO2S2 terminal 1) and ground.
Continuity should not exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK GROUND CIRCUIT
1. Check harness continuity between HO2S2 terminal 4 and body ground.
Refer to wiring diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK©GO TO 7.
NG©GO TO 6.
HEATED OXYGEN SENSOR 2 (REAR)SR20DE
Diagnostic Procedure (Cont'd)
EC-960