NISSAN PRIMERA 1999 Electronic Repair Manual

POWER TRANSISTORNCEC0573S021. Disconnect power transistor harness connector.
2. Check power transistor resistance between terminals 5 and 7.
Terminals Resistance Result
5 and 7Except 0WOK
0WNG
If NG, replace distributor.
SEF239X
Distributor
IGNITION SIGNALSR20DE
Component Inspection (Cont'd)
EC-311

CONSULT-II Reference Value in Data Monitor
Mode
NCEC0441Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNALIIgnition switch: ON,START,ON OFF,ON,OFF
ECM Terminals and Reference ValueNCEC0442Specification data are reference values and are measured between each terminal and 48 (ECM 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-312

Wiring DiagramNCEC0440
YEC252
BATTERY
Refer to EL-POWER.
Detectable line for DTC
Non-detectable line for DTC
Hyper CVT models
M/T models
FUSE
BLOCK
(J/B) IGNITION
SWITCH
ECM
.REFER TO THE FOLLOWING
M1FUSE BLOCK -
Junction Box (J/B)
E104FUSE BLOCK -
Junction Box (J/B)
OFF
ACC
ONST
START SIGNALSR20DE
Wiring Diagram
EC-313

Diagnostic Procedure=NCEC0443
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.
PEF111P
MTBL0140
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.
SEF142X
MTBL0143
OK or NG
OK©INSPECTION END
NG©GO TO 4.
Condition ªSTART SIGNALº
IGN ªONºOFF
IGN ªSTARTºON
CONNECT
Condition Voltage
Ignition switch ªSTARTºBattery voltage
Except aboveApproximately 0V
START SIGNALSR20DE
Diagnostic Procedure
EC-314

4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M50, F104 (CVT: M81, F115)
I10A fuse
IHarness 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-SR-114.
©INSPECTION END
START SIGNALSR20DE
Diagnostic Procedure (Cont'd)
EC-315

System DescriptionNCEC0444
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor (REF) Engine speed
ECM Fuel pump relay
Ignition switch 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 2 seconds
Engine running and cranking Operates
When engine is stopped Stops in 1.5 seconds
Except as shown aboveStops
Component DescriptionNCEC0501A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0445
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLYIIgnition switch is turned to ON (Operates for 2 seconds)
IEngine running and cranking
IWhen engine is stopped (stops in 1.5 seconds)ON
IExcept as shown above OFF
ECM Terminals and Reference ValueNCEC0446Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
21 B/P Fuel pump relay[Ignition switch ªONº]
IFor 2 seconds after turning ignition switch ªONº
[Engine is running]0-1V
[Ignition switch ªONº]
IMore than 1 second after turning ignition switch
ªONºBATTERY VOLTAGE
(11 - 14V)
AEC801
FUEL PUMPSR20DE
System Description
EC-316

Wiring DiagramNCEC0447
YEC253
IGNITION SWITCH
ON or START
Refer to EL-POWER.
Detectable line for DTC
Non-detectable line for DTC
Hyper CVT models
M/T models FUSE
BLOCK
(J/B)
ECM
.REFER TO THE FOLLOWING
M1FUSE BLOCK -
Junction Box (J/B)
B8FUSE BLOCK -
Junction Box (J/B)
FUEL
PUMP
RELAY
FUEL PUMP
FUEL PUMPSR20DE
Wiring Diagram
EC-317

Diagnostic ProcedureNCEC0448
1 CHECK OVERALL FUNCTION
1. Turn ignition switch ªONº.
2. Pinch fuel feed hose with fingers.
SEF241XFuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ªONº.
OK or NG
OK©INSPECTION END
NG©GO TO 2.
2 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect fuel pump relay located on the fuse block.
SEF071X3. Turn ignition switch ªONº.
4. Check voltage between terminals 1, 3 and ground with CONSULT-II or tester.
SEF144XVoltage: Battery voltage
OK or NG
OK©GO TO 4.
NG©GO TO 3.
Fuel filter
Pinch
FUEL PUMPSR20DE
Diagnostic Procedure
EC-318

3 DETECT MALFUNCTIONING PART
Check the following.
I15A fuse
IHarness for open or short between fuse and fuel pump relay
©Repair harness or connectors.
4 CHECK POWER GROUND CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect fuel pump harness connector.
SEF299W3. Check harness continuity between fuel pump harness connector terminal 2 and body ground, terminal 1 and fuel pump relay connector
terminal 9J.
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 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
IHarness for open or short between fuel pump and body ground
IHarness for open or short between fuel pump and fuel pump relay
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 21 and fuel pump relay connector terminal 19C.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 8.
NG©GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M50, F104 (CVT: M81, F115)
IHarness for open or short between ECM and fuel pump relay
NG©Repair open circuit or short to ground or short to power in harness or connectors.
FUEL PUMPSR20DE
Diagnostic Procedure (Cont'd)
EC-319

Component InspectionNCEC0449FUEL PUMP RELAYNCEC0449S01Check continuity between terminals 3 and 5.
Conditions Continuity
12V direct current supply between terminals 1 and 2Ye s
No current supplyNo
If NG, replace relay.
FUEL PUMPNCEC0449S021. Disconnect fuel pump harness connector.
2. Check resistance between terminals 1 and 2.
Resistance: 0.2 - 5.0W[at 25ÉC (77ÉF)]
If NG, replace fuel pump.
8 CHECK FUEL PUMP RELAY
Refer to ªComponent Inspectionº, EC-SR-320.
OK or NG
OK©GO TO 9.
NG©Replace fuel pump relay.
9 CHECK FUEL PUMP
Refer to ªComponent Inspectionº, EC-SR-320.
OK or NG
OK©GO TO 10.
NG©Replace fuel pump.
10 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-SR-114.
©INSPECTION END
SEF145X
SEF326W
FUEL PUMPSR20DE
Component Inspection
EC-320