NISSAN LATIO 2007 Service Repair Manual

EC-562Revision: June 2006
ELECTRICAL LOAD SIGNAL
2007 Versa
ELECTRICAL LOAD SIGNALPFP:25350
CONSULT-II Reference Value in Data Monitor ModeUBS00PTM
Specification data are reference values.
Diagnostic ProcedureUBS00PTN
1. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCITION-I
1. Turn ignition switch ON.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-
II under the following conditions.
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
Check “HEATER FAN SW” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 6.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL

Ignition switch: ONRear window defogger switch is ON and/or lighting
switch is in 2nd position.ON
Rear window defogger switch is OFF and lighting switch
is OFF.OFF
HEATER FAN SW

Ignition switch: ONHeater fan: Operating. ON
Heater fan: Not operating. OFF
Condition LOAD SIGNAL
Lighting switch: ON at 2nd position ON
Lighting switch: OFF OFF
PBIB0103E
Condition LOAD SIGNAL
Rear window defogger switch: ON ON
Rear window defogger switch: OFF OFF
PBIB0103E
Condition LOAD SIGNAL
Heater fan control switch: ON ON
Heater fan control switch: OFF OFF
PBIB1995E

ELECTRICAL LOAD SIGNAL
EC-563
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4. CHECK HEADLAMP SYSTEM
Refer to LT- 5 , "
HEADLAMP (FOR USA)" or LT-27, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYS-
TEM -" .
>>INSPECTION END
5. CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to GW-50, "
REAR WINDOW DEFOGGER" .
>>INSPECTION END
6. CHECK HEATER FAN CONTROL SYSTEM
Refer to MTC-24, "
TROUBLE DIAGNOSIS" .
>>INSPECTION END

EC-564Revision: June 2006
FUEL INJECTOR
2007 Versa
FUEL INJECTORPFP:16600
Component DescriptionUBS00PTO
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeUBS00PTP
Specification data are reference values.
PBIA9664J
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL See EC-133, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
INJ PULSE-B1

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T, CVT),
Neutral (M/T)

No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec

FUEL INJECTOR
EC-565
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Wiring DiagramUBS00PTQ
BBWA2660E

EC-566Revision: June 2006
FUEL INJECTOR
2007 Versa
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureUBS00PTR
1. INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
25
29
30
31V
Y
O
LFuel injector No. 4
Fuel injector No. 3
Fuel injector No. 2
Fuel injector No. 1[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0529E
PBIA4943J

FUEL INJECTOR
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2. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that each circuit produces a momentary engine
speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each fuel injector operating sound.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
PBIB0133E
Clicking noise should be heard.
PBIB3332E

EC-568Revision: June 2006
FUEL INJECTOR
2007 Versa
3. CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector (1) harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E8, F8

IPDM E/R harness connector E45

10A fuse

Harness for open or short between fuel injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 25, 29, 30, 31.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK FUEL INJECTOR
Refer to EC-569, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace fuel injector.
PBIA9870J
Voltage: Battery voltage
PBIB0582E
Continuity should exist.

FUEL INJECTOR
EC-569
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7. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionUBS00PTS
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationUBS00PTT
FUEL INJECTOR
Refer to EM-33, "FUEL INJECTOR AND FUEL TUBE" . Resistance: 11.1 - 14.5Ω [at 10 - 60°C (50 - 140°F)]
PBIA9579J

EC-570Revision: June 2006
FUEL PUMP
2007 Versa
FUEL PUMPPFP:17042
DescriptionUBS00PTU
SYSTEM DESCRIPTION
*: 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.

Fuel level sensor unit and fuel pump (1)

Fuel pressure regulator (2)

Fuel level sensor (3)

Fuel tank temperature sensor (4)
CONSULT-II Reference Value in Data Monitor ModeUBS00PTV
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
Engine: StoppedStops in 1.5 seconds
Except as shown aboveSto ps
BBIA0704E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF

FUEL PUMP
EC-571
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Wiring DiagramUBS00PTW
BBWA2661E