2001 NISSAN PICK-UP engine

Diagnostic ProcedureNEEC0325
1 INSPECTION START
Turn ignition switch ªOFFº, and restart engine.
Is engine running?
YesorNo
Yes (With CONSULT-II)©GO TO 2.
Yes (Without CONSULT-
II)©GO TO 3.
No©GO TO 4.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
2. Make sure that all circuits do not produce a momentary engine speed drop.
SEF981Z
OK or NG
OK©INSPECTION END
NG©GO TO 7.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminal 1 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as shown below.
SEF984Z
OK or NG
OK©INSPECTION END
NG©GO TO 7.
IGNITION SIGNALKA24DE (EURO OBD)
Diagnostic Procedure
EC-3365

4 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
SEC276D
3. Turn ignition switch ON.
4. Check voltage between terminal 7 and ground with CONSULT-II or tester.
AEC698
Voltage: Battery voltage
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+Harness for open or short between ignition coil and ECM relay
+Harness for open or short between ECM relay and fuse
©Repair harness or connectors.
6 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power transistor harness connector.
3. Check harness continuity between power transistor terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK©GO TO 7.
NG©Repair open circuit or short to power in harness or connectors.
IGNITION SIGNALKA24DE (EURO OBD)
Diagnostic Procedure
EC-3366

SEF812J
Component DescriptionNEEC0435The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The
amount of fuel injected depends upon the injection pulse duration.
Pulse duration is the length of time the injector remains open. The
ECM controls the injection pulse duration based on engine fuel
needs.
ECM Terminals and Reference ValueNEEC0437Specification 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)
102
104
109
111W/L
W/G
W/R
W/BInjector No. 1
Injector No. 3
Injector No. 2
Injector No. 4[Engine is running]
+Warm-up condition
+Idle speedBATTERY VOLTAGE
(11 - 14V)
SEF011W
[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
SEF012W
INJECTORKA24DE (EURO OBD)
Component Description
EC-3369

Diagnostic ProcedureNEEC0438
1 CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
SEF981Z
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
MEC703B
Clicking noise should be heard.
OK or NG
OK©INSPECTION END
NG©GO TO 2.
INJECTORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3371

2 CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between injector terminal 2 and ground with CONSULT-II or tester.
SEC277D
Voltage: Battery voltage
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+10A fuse
+Harness for open or short between injector and fuse
©Repair harness or connectors.
4 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 1 and ECM terminals 102, 104, 109, 111. 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 harness for open or short between ECM and injector.
©Repair open circuit or short to ground or short to power in harness or connectors.
INJECTORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3372

System DescriptionNEEC0444
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speed
Fuel pump
controlFuel 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 5 seconds.
Engine running and cranking Operates.
Except as shown aboveStops.
SFE425A
Component DescriptionNEEC0501The fuel pump with a fuel damper is an in-tank type (the pump and
damper are located in the fuel tank).
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0445
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY+Ignition switch is turned to ON (Operates for 5 seconds)
+Engine running and crankingON
+Except as shown above OFF
FUEL PUMPKA24DE (EURO OBD)
System Description
EC-3378

ECM Terminals and Reference Value=NEEC0446Specification 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)
11*1 Y Fuel pump relay[Ignition switch ªONº]
+For 5 seconds after turning ignition switch ªONº
[Engine is running]0-1V
[Ignition switch ªONº]
+More than 5 seconds after turning ignition switch
ªONºBATTERY VOLTAGE
(11 - 14V)
14*2 Y Fuel pump relay[Ignition switch ON]
+For 5 seconds after turning ignition switch0-1V
[Ignition switch ON]
+More than 5 seconds after turning ignition switch
ONBATTERY VOLTAGE
(11 - 14V)
*1: Model without NATS (Nissan Anti-Theft System)
*2: Model with NATS (Nissan Anti-Theft System)
FUEL PUMPKA24DE (EURO OBD)
ECM Terminals and Reference Value
EC-3379

SEF351V
Component DescriptionNEEC0451The power steering oil pressure switch is attached to the power
steering high-pressure tube and detects a power steering load.
When a power steering load is detected, it signals the ECM. The
ECM adjusts the IACV-AAC valve to increase the idle speed and
adjust for the increased load.
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0452Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
PW/ST SIGNAL+Engine: After warming up, idle
the engineSteering wheel in neutral position
(forward direction)OFF
The steering wheel is fully turned ON
ECM Terminals and Reference ValueNEEC0453Specification 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)
39 SBPower steering oil pres-
sure switch[Engine is running]
+Steering wheel is fully turnedApproximately 0V
[Engine is running]
+Steering wheel is not turnedApproximately 5V
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Component Description
EC-3385