NISSAN ALMERA TINO 2001 Service Repair Manual

6 CHECK INJECTOR
Refer to ªComponent Inspectionº, EC-1026.
OK or NG
OK©GO TO 7.
NG©Replace injector.
7 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF612Y
Component InspectionNLEC1860INJECTORNLEC1860S011. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Resistance: 13.1 - 16.0W[at 25ÉC (77ÉF)]
If NG, replace injector.
INJECTORSR20DE
Diagnostic Procedure (Cont'd)
EC-1026

CONSULT-II Reference Value in Data Monitor
Mode
NLEC1861Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNAL+Ignition switch: ON®START®ON OFF®ON®OFF
ECM Terminals and Reference ValueNLEC1862Specification 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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
41 B/Y Start signal[Ignition switch ªONº]Approximately 0V
[Ignition switch ªSTARTº]9 - 12V
START SIGNALSR20DE
CONSULT-II Reference Value in Data Monitor Mode
EC-1027

Wiring DiagramNLEC1863MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1863S01
YEC713
START SIGNALSR20DE
Wiring Diagram
EC-1028

MODELS WITH ECM IN CABINNLEC1863S02
YEC941
START SIGNALSR20DE
Wiring Diagram (Cont'd)
EC-1029

Diagnostic Procedure=NLEC1864
1 INSPECTION START
Do you have CONSULT-II?
YesorNo
Ye s©GO TO 2.
No©GO TO 3.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Check ªSTART SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEF227Y
OK or NG
OK©INSPECTION END
NG©GO TO 4.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch to ªSTARTº.
2. Check voltage between ECM terminal 41 and ground under the following conditions.
SEF613Y
OK or NG
OK©INSPECTION END
NG©GO TO 4.
START SIGNALSR20DE
Diagnostic Procedure
EC-1030

4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M49, F43 (where fitted)
+Harness connectors M71, F45 (where fitted)
+10A fuse
+Harness for open or short between ECM and ignition switch
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 INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
START SIGNALSR20DE
Diagnostic Procedure (Cont'd)
EC-1031

System DescriptionNLEC1865
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speed
Fuel pump
controlFuel pump relay
Ignition switch Ignition signal and start signal
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 180É signal from the camshaft position sensor, it knows that the engine is
rotating, and causes the pump to perform. If the 180É 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.
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second
Engine running and cranking Operates
When engine is stopped (Signal is not sent from crankshaft position sensor
and camshaft position sensor.)Stops in 1.5 seconds
Except as shown aboveStops
SEF605X
Component DescriptionNLEC1866A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1867
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY+Ignition switch is turned to ON (Operates for 1 second)
+Engine running and cranking
+When engine is stopped (stops in 1.5 seconds)ON
+Except as shown above OFF
FUEL PUMPSR20DE
System Description
EC-1032

ECM Terminals and Reference Value=NLEC1868Specification 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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
21 B/P Fuel pump relay[Ignition switch ªONº]
+For 1 second after turning ignition switch ªONº
[Engine is running]0-1V
[Ignition switch ªONº]
+More than 1 second after turning ignition switch
ªONºBATTERY VOLTAGE
(11 - 14V)
FUEL PUMPSR20DE
ECM Terminals and Reference Value
EC-1033

Wiring DiagramNLEC1869MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1869S01
YEC714
FUEL PUMPSR20DE
Wiring Diagram
EC-1034

MODELS WITH ECM IN CABINNLEC1869S02
YEC942
FUEL PUMPSR20DE
Wiring Diagram (Cont'd)
EC-1035