2001 NISSAN ALMERA wiring

Diagnostic ProcedureNJEC0278
1 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 86 and meter terminal 57 (Sedan), 39 or 4 (Hatchback).
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 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M63, F102
+Harness for open or short between ECM and combination meter
©Repair open circuit or short to ground or short to power in harness or connectors.
3 CHECK SPEEDOMETER FUNCTION
Make sure that speedometer functions properly.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 CHECK SPEEDOMETER CIRCUIT
Check the following.
+Harness connectors M63, F102
+Harness connectors M73, F111 or M169, F113 (Hatchback only)
+Harness for open or short between combination meter and vehicle speed sensor
+Harness for open or short between vehicle speed sensor and ground (Sedan only)
OK©Check combination meter and vehicle speed sensor. Refer to EL-144, ªMETERS AND
GAUGESº.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-177.
©INSPECTION END
DTC P0500 VEHICLE SPEED SENSOR (VSS)QG
Diagnostic Procedure
EC-375

Wiring DiagramNJEC0284SEDAN MODELS AND HATCHBACK MODELS WITH
ECM IN ENGINE COMPARTMENT
NJEC0284S01
HEC798
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð AUXILIARY AIR CONTROL
(AAC) VALVE
QG
Wiring Diagram
EC-378

HATCHBACK MODELS WITH ECM IN CABINNJEC0284S02
HEC978
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð AUXILIARY AIR CONTROL
(AAC) VALVE
QG
Wiring Diagram (Cont'd)
EC-379

Diagnostic ProcedureNJEC0285
1 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect IACV-AAC valve harness connector.
NEF316A
3. Turn ignition switch ªONº.
4. Check voltage between terminal 2, 5 and ground with CONSULT-II or tester.
SEF343X
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E75, F36 (If so equipped)
+Harness for open or short between IACV-AAC and ECM relay
©Repair harness or connectors.
3 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM terminal 6 and terminal 1,
ECM terminal 7 and terminal 4,
ECM terminal 15 and terminal 3,
ECM terminal 16 and terminal 6.
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 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð AUXILIARY AIR CONTROL
(AAC) VALVE
QG
Diagnostic Procedure
EC-380

Wiring DiagramNJEC0292
HEC799
DTC P0510 CLOSED THROTTLE POSITION SWITCH (WHERE FITTED)QG
Wiring Diagram
EC-387

Diagnostic ProcedureNJEC0293
1 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect throttle position switch harness connector.
JEF091Y
3. Turn ignition switch ªONº.
4. Check voltage between terminal 5 and engine ground with CONSULT-II or tester.
SEF837X
Voltage: Battery voltage
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E74, F35
+10A fuse
+Harness for open or short between throttle position switch and fuse
©Repair harness or connectors.
3 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 40 and 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©GO TO 4.
DTC P0510 CLOSED THROTTLE POSITION SWITCH (WHERE FITTED)QG
Diagnostic Procedure
EC-388

1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch ªOFFº.
3) Disconnect throttle position switch harness connector.
4) Check continuity between terminals 4 and 5 under the follow-
ing conditions. Refer to wiring diagram.
NOTE:
Continuity measurement must be made with closed throttle
position switch installed in vehicle.
Throttle valve conditions Continuity
Completely closed Yes
Partially open or completely open No
If NG, adjust closed throttle position switch. Refer to ªBasic
Inspectionº, EC-100.
5) If it is impossible to adjust closed throttle position switch in
ªBasic Inspectionº, replace closed throttle position switch.
DTC P0510 CLOSED THROTTLE POSITION SWITCH (WHERE FITTED)QG
Component Inspection (Cont'd)
EC-390

Wiring DiagramNJEC0519SEDAN MODELS AND HATCHBACK MODELS WITH
ECM IN ENGINE COMPARTMENT
NJEC0519S01
HEC801
D T C P 1111INTAKE VALVE TIMING CONTROL SOLENOID VALVEQG
Wiring Diagram
EC-395