2001 NISSAN PICK-UP power steering

DescriptionNEEC1594SYSTEM DESCRIPTIONNEEC1594S01
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speed
Idle air
controlIACV-AAC valve Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Throttle position sensor Throttle position
PNP switch Neutral position
Air conditioner switch Air conditioner operation
Power steering oil pressure switch Power steering load signal
Battery Battery voltage
Vehicle speed sensor Vehicle speed
Intake air temperature sensor Intake air temperature
This system automatically controls engine idle speed to a specified
level. Idle speed is controlled through fine adjustment of the
amount of air which bypasses the throttle valve via IACV-AAC
valve. The IACV-AAC valve repeats ON/OFF operation according
to the signal sent from the ECM. The camshaft position sensor
detects the actual engine speed and sends a signal to the ECM.
The ECM then controls the ON/OFF time of the IACV-AAC valve
so that engine speed coincides with the target value memorized in
ECM. The target engine speed is the lowest speed at which the
engine can operate steadily. The optimum value stored in the ECM
is determined by taking into consideration various engine
conditions, such as during warm up, deceleration, and engine load
(air conditioner, power steering and cooling fan operation).
SEF040E
COMPONENT DESCRIPTIONNEEC1594S02The IAC valve-AAC valve is moved by ON/OFF pulses from the
ECM. The longer the ON pulse, the greater the amount of air that
will flow through the valve. The more air that flows through the
valve, the higher the idle speed.
CONSULT-II Reference Value in Data Monitor
Mode
NEEC1595
MONITOR ITEM CONDITION SPECIFICATION
IACV-AAC/V+Engine: After warming up
+Air conditioner switch: OFF
+Shift lever: ªNº
+No-loadIdle Approx. 30%
2,000 rpm Ð
DTC P0505 ISC SYSTEMKA24DE (EURO OBD)
Description
EC-3295

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

Wiring DiagramNEEC0450
GEC257A
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Wiring Diagram
EC-3386

Diagnostic Procedure=NEEC0454
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. Start engine.
2. Check ªPW/ST SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
LEC065A
OK or NG
OK©INSPECTION END
NG©GO TO 4.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine.
2. Check voltage between ECM terminal 39 and ground under the following conditions.
SEF662P
MTBL0142
OK or NG
OK©INSPECTION END
NG©GO TO 4.
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3387

4 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 39 and terminal 1. 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.
+Harness connectors M5, E101
Check the harness for open or short between ECM and power steering oil pressure switch.
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK GROUND CIRCUIT
1. Disconnect power steering oil pressure switch harness connector.
2. Check continuity between power steering oil pressure switch harness connector terminal 2 and ground.
Continuity should exist.
OK or NG
OK©
NG©Repair open circuit or short to power in harness or connectors.
7 CHECK POWER STEERING OIL PRESSURE SWITCH
1. Disconnect power steering oil pressure switch harness connector then start engine.
2. Check continuity between terminals 1 and ground. Refer to wiring diagram.
MTBL0307
OK or NG
OK©GO TO 8.
NG©Replace power steering oil pressure switch.
8 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3388

2. Disconnect the fuel hoses from the fuel injection pump.
3. Disconnect the harness connector from the fuel injection
pump.
+Disconnect the connector by pulling the connector stopper
fully.
+When the stopper is fully pulled, the connector will be dis-
connected together. For installation, push the connector half
way first, then press the stopper until it locks, so that the
connector is connected together.
4. Remove the fuel injection pump rear bracket.
5. Remove the front chain case.
+Move the power steering fluid reservoir tank from the bracket.
+Loosen and remove the mounting bolts in the reverse order
of the numbers shown in the figure.
+As for bolts 6, 10, and 11, remove with rubber washer
because there is not enough space for removing only the
bolts.
CAUTION:
To prevent foreign objects from getting in the engine, cover
the opening during the removal of the front chain case.
6. Adjust the No. 1 cylinder to the top dead center position.
+Turn the crankshaft pulley clockwise, then align the align-
ment mark (punched mark) of the camshaft sprocket to the
position shown in the figure.
+There is no indicator on the crankshaft pulley.
+It is not necessary to mark the secondary timing chain for
removal because it can be matched by the link color for
installation. However, the alignment mark on the fuel injec-
tion pump sprocket is difficult to see; mark it if necessary.
7. Remove the chain tensioner.
a. Push the plunger of the chain tensioner, then fix it with a tool
such as a push pin.
b. Using the hexagon wrench (face to face: 5 mm) (SST),
remove the mounting bolts, then remove the chain tensioner.
+A multi-purpose tool may also be used.
JEF351Y
JEF352Y
JEF353Y
JEF354Y
JEF355Y
BASIC SERVICE PROCEDUREYD25DDTi
Electronic Control Fuel Injection Pump
(Cont'd)
EC-3420

Service Data and Specifications (SDS)
ALTERNATOR
TypeA5TA5271 A7TA8471 A5TA5372 A3TB0699 LR160-745 LR160-728E
MITSUBISHI HITACHI
Applied model KA24DEZ24
YD25 ZD30 TD27, QD32
Standard Option*
Nominal rating V-A 12-70 12-35 12-70 12-90 12-60
Ground polarityNegative
Minimum revolution under no-
load
(When 13.5V is applied) rpmLess than 1,300 Less than 1,000
Hot output current
(When 13.5V is applied) A/rpmMore than
14/1,300
More than
54/2,500More than
27/2,500More than
18/1,300
More than
51/2,500More than
29/1,300
More than
76/2,500
More than
88/5,000More than
17/1,300
More than
48/2,500
More than
57/5,000
Regulated output voltage V 14.1 - 14.7
Minimum length of brush
mm (in)5.0 (0.20) 6.0 (0.236)
Brush spring pressure
N (g, oz)4.8 - 6.0 (487 - 612, 17.25 - 21.59) 1.0 - 3.43 (102 - 350, 3.60 - 12.34)
Slip ring minimum outer diameter
mm (in)22.1 (0.870) 26.0 (1.024)
Rotor (Field coil) resistanceW2.5 - 2.9 2.7 - 3.2 2.5 - 2.9 2.1 - 2.5 2.6 2.58
*: Models with power steering and air conditioner
CHARGING SYSTEM
EL-3022

Code Section Wiring Diagram Name
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PRWIRE EL Theft Warning System Pre-wire
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
SHIFT AT Shift Lock System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
ValveCode Section Wiring Diagram Name
TAIL/L EL Parking, License and Tail Lamps
TCV ATTorque Converter Clutch Solenoid
Valve
TPS EC, AT Throttle Position Sensor
TP/SW EC Throttle Position Sensor
TURN ELTurn Signal and Hazard Warning
Lamps
VSS EC Vehicle Speed Sensor
VSSA/T ATVehicle Speed Sensor A/T (Revolu-
tion Sensor)
VSSMTR AT Vehicle Speed Sensor Meter
WARN EL Warning Lamps
WINDOW EL Power Window
WIPER EL Front Wiper and Washer
WIRING DIAGRAM CODES (CELL CODES)
EL-3195