2003 NISSAN ALMERA N16 relay

IVT CONTROL SOLENOID VALVE
EC-687
[QG (WITHOUT EURO-OBD)]
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2.CHECK IVT CONTROL SOLENOID VALVE POWER SUPPLY CIRCIUT
1. Turn ignition switch “OFF”.
2. Disconnect intake valve timing control solenoid valve harness
connector.
3. Turn ignition switch “ON”.
4. Check voltage between intake valve timing control solenoid
valve terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTION PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between intake valve timing control solenoid valve and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK IVT CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 62 and intake valve timing control solenoid valve termi-
nal 2. Refer to Wiring Diagram.
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 INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-688, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace intake valve timing control solenoid valve.
MBIB0106E
Voltage: Battery voltage
PBIB0285E
Continuity should exist.

FUEL PUMP CIRCUIT
EC-699
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FUEL PUMP CIRCUITPFP:17042
DescriptionEBS00KM1
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS00KM2
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
*
Fuel pump control Fuel pump relay
Battery
Battery voltage
*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
MBIB0046E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
●For 1 seconds after turning ignition switch ON
●Engine running or crankingON
●Except above conditions OFF

FUEL PUMP CIRCUIT
EC-701
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS00KM4
1.CHECK OVERALL FUNCTION
1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel hose for 1
second after ignition switch is turned “ON”.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect fuel pump relay.
3. Turn ignition switch “ON”.
4. Check voltage between fuel pump relay terminals 1, 5 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
113 B/P Fuel pump relay[Ignition switch “ON”]
●For 1 seconds after turning ignition switch “ON”.
[Engine is running]0 - 1.0V
[Ignition switch “ON”]
●More than 1 seconds after turning ignition switch
“ON”.BATTERY VOLTAGE
(11 - 14V)
MBIB0114E
MBIB0257E
Voltage: Battery voltage
PBIB0303E

EC-702
[QG (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
3. DETECT MALFUNCTIONING PART
Check the following.
●Fuse block (J/B) connector B4
●10A fuse
●15A fuse
●Harness for open or short between fuel pump relay and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness con-
nector.
3. Check harness continuity between fuel pump relay terminal 3
and fuel level sensor unit and fuel pump terminal 5, fuel level
sensor unit and fuel pump terminal 3 and body ground.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors B61, D91 (Hatchback models with power door lock)
●Harness connectors B62, D92 (Hatchback models without power door lock)
●Harness for open or short between fuel level sensor unit and fuel pump and fuel pump relay
●Harness for open or short between fuel level sensor unit and fuel pump and body ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 113 and fuel pump relay terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.Continuity should exist.
MBIB0115E
Continuity should exist.

FUEL PUMP CIRCUIT
EC-703
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7.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Harness connectors B38, M81
●Harness for open or short between ECM and fuel pump relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK FUEL PUMP RELAY
Refer to EC-703, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace fuel pump relay.
9.CHECK FUEL PUMP
Refer to EC-703, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace fuel pump.
10.CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00KM5
FUEL PUMP RELAY
Check continuity between terminals 3 and 4, 3 and 5 under the fol-
lowing conditions.
FUEL PUMP
1. Disconnect fuel level sensor unit and fuel pump harness con-
nector.
Conditions Terminals Continuity
12V direct current supply
between terminals 1 and 23 and 4 No
3 and 5 Yes
No current supply3 and 4 Yes
3 and 5 No
PBIB0098E
MBIB0115E

ELECTRICAL LOAD SIGNAL
EC-713
[QG (WITHOUT EURO-OBD)]
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3.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Without CONSULT-II
Check voltage between ECM terminal 84 and ground under the fol-
lowing conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
4.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to EL-173.
>>INSPECTION END
5.CHECK HEADLAMP FUNCTION
1. Turn lighting switch “ON” at 2nd position.
2. Check that headlamps are illuminated.
OK or NG
OK >> GO TO 6.
NG >> Refer to EL-42 or EL-46.
6.CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
WITHOUT DAYTIME LIGHT SYSTEM
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harness connector.
4. Check harness continuity between ECM terminal 84 and lighting switch terminal 10.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
WITH DAYTIME LIGHT SYSTEM
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect daytime light relay.
4. Check harness continuity between ECM terminal 84 and daytime light relay terminal 3.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
Condition Voltage
Lighting switch “ON” at 2nd position Battery voltage
Lighting switch “OFF” Approximately 0V
MBIB0158E
Continuity should exist.
Continuity should exist.

EC-714
[QG (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL
7. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E75, F36
●harness for open and short between ECM and lighting switch
●harness for open and short between ECM and daytime light relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END

System ChartNJEC0611
Input (Sensor) ECM Function Output (Actuator)
Electronic control fuel injection pump
Crankshaft position sensor (TDC)
Engine coolant temperature sensor
Accelerator position sensor
Accelerator position switch
Park/Neutral position (PNP) switch*
Ignition switch
Battery voltage
Vehicle speed sensor
Air conditioner switch
Mass air flow sensor
Stop lamp switchFuel injection controlElectronic control fuel injection
pump
Fuel injection timing controlElectronic control fuel injection
pump
Fuel cut controlElectronic control fuel injection
pump
Glow control system Glow relay & glow lamp
On board diagnostic system MI (On the instrument panel)
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Air conditioning cut control Air conditioner relay
*: If so equipped
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD
System Chart
EC-16