check engine NISSAN PICK-UP 2001 Repair Manual

General Specifications
CLUTCH MASTER CYLINDER
Inner diameter mm (in) 15.87 (5/8)
CLUTCH OPERATING CYLINDER
Inner diameter mm (in) 19.05 (3/4)
CLUTCH DISC
Model 250
Engine YD25DDTi
Facing size mm (in)
(Outer dia. x inner dia. x thick-
ness)250 x 160 x 3.5
(9.84 x 6.30 x 0.138)
Thickness of disc assembly
With load mm (in)7.85 - 8.35 (0.3091 - 0.3287)
With 7,360 N (751 kg, 1,655 lb)
CLUTCH COVER
Model 250
Engine YD25DDTi
Full load N (kg, lb) 7,360 (751, 1,655)
Inspection and Adjustment
CLUTCH PEDAL
Unit: mm (in)
Pedal height ªH*º
RHD model
YD25DDTi engine model203 - 213
(7.99 - 8.39)
LHD model
YD25DDTi engine model237 - 247
(9.33 - 9.72)
Pedal free play (at clevis pin) 1 - 1.5 (0.039 - 0.059)
*: Measured from surface of melt sheet to pedal pad
CLUTCH DISC
Unit: mm (in)
Mode 250
Engine model YD25DDTi
Wear limit of facing surface to
rivet head0.3 (0.012)
Runout limit of facing 0.7 (0.028)
Distance of runout check point
(from the hub center)120 (4.72)
Maximum backlash of spline
(at outer edge of disc)1.0 (0.039)
CLUTCH COVER
Unit: mm (in)
Model 250
Engine model YD25DDTi
Diaphragm spring height 39.5 - 41.5 (1.555 - 1.634)
Uneven limit of diaphragm spring
toe height0.7 (0.028)
SERVICE DATA AND SPECIFICATIONS (SDS)
CL-3002

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
PRECAUTIONS AND PREPARATION............... 3008
Special Service Tool (YD25DDTi) ................... 3008
Supplemental Restraint System (SRS)²AIR
BAG²................................................................ 3008
KA24DE (EURO OBD)
Trouble Diagnosis - Index................................. 3009
Alphabetical & P No. Index for DTC................ 3009
Precautions......................................................... 3012
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER².. 3012
Precautions for On Board Diagnostic (OBD)
System of Engine............................................. 3012
Engine Fuel & Emission Control System ........ 3013
Precautions ...................................................... 3014
Wiring Diagrams and Trouble Diagnosis ......... 3015
Preparation.......................................................... 3016
Special Service Tools ...................................... 3016
Commercial Service Tools ............................... 3016
Engine and Emission Control Overall System3018
Engine Control Component Parts Location ..... 3018
Circuit Diagram ................................................ 3020
System Diagram .............................................. 3021
Vacuum Hose Drawing .................................... 3022
System Chart ................................................... 3023
Engine and Emission Basic Control System
Description.......................................................... 3024
Multiport Fuel Injection (MFI) System.............. 3024
Distributor Ignition (DI) System........................ 3026
Air Conditioning Cut Control ............................ 3028
Fuel Cut Control (at no load & high engine
speed) .............................................................. 3028Evaporative Emission System ......................... 3029
Positive Crankcase Ventilation ........................ 3032
Basic Service Procedure................................... 3033
Fuel Pressure Release .................................... 3033
Fuel Pressure Check ....................................... 3033
Fuel Pressure Regulator Check ...................... 3034
Injector ............................................................. 3034
Fast Idle Cam (FIC) ......................................... 3035
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ....................................................... 3035
On Board Diagnostic System Description...... 3049
Introduction ...................................................... 3049
Two Trip Detection Logic ................................. 3049
Emission-related Diagnostic Information ......... 3049
NVIS (Nissan Vehicle Immobilizer System -
NATS) .............................................................. 3061
Malfunction Indicator (MI) ................................ 3061
OBD System Operation Chart ......................... 3064
CONSULT-II ..................................................... 3070
Generic Scan Tool (GST) ................................ 3080
Trouble Diagnosis - Introduction..................... 3082
Introduction ...................................................... 3082
Work Flow ........................................................ 3084
Trouble Diagnosis - Basic Inspection.............. 3086
Basic Inspection ............................................... 3086
Trouble Diagnosis - General Description........ 3100
DTC Inspection Priority Chart .......................... 3100
Fail-safe Chart ................................................. 3101
Symptom Matrix Chart ..................................... 3102
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3106
Major Sensor Reference Graph in Data
Monitor Mode ................................................... 3107

BR

DTC Confirmation Procedure .......................... 3308
Diagnostic Procedure....................................... 3309
DTC P1143 HO2S1.............................................. 3310
Component Description ................................... 3310
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3310
ECM Terminals and Reference Value ............. 3310
On Board Diagnosis Logic ............................... 3311
DTC Confirmation Procedure .......................... 3311
Overall Function Check ................................... 3312
Diagnostic Procedure....................................... 3312
DTC P1144 HO2S1.............................................. 3317
Component Description ................................... 3317
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3317
ECM Terminals and Reference Value ............. 3317
On Board Diagnosis Logic ............................... 3318
DTC Confirmation Procedure .......................... 3318
Overall Function Check ................................... 3319
Diagnostic Procedure....................................... 3319
DTC P1146 HO2S2.............................................. 3324
Component Description ................................... 3324
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3324
ECM Terminals and Reference Value ............. 3324
On Board Diagnosis Logic ............................... 3324
DTC Confirmation Procedure .......................... 3325
Overall Function Check ................................... 3326
Wiring Diagram ................................................ 3327
Diagnostic Procedure....................................... 3328
DTC P1147 HO2S2.............................................. 3334
Component Description ................................... 3334
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3334
ECM Terminals and Reference Value ............. 3334
On Board Diagnosis Logic ............................... 3334
DTC Confirmation Procedure .......................... 3335
Overall Function Check ................................... 3336
Wiring Diagram ................................................ 3337
Diagnostic Procedure....................................... 3338
DTC P1217 Engine Over Temperature............. 3344
On Board Diagnosis Logic ............................... 3344
Overall Function Check ................................... 3344
Diagnostic Procedure....................................... 3345
Main 11 Causes of Overheating ...................... 3348
DTC P1336 CKP Sensor (OBD)......................... 3349
Component Description ................................... 3349
ECM Terminals and Reference Value ............. 3349
On Board Diagnosis Logic ............................... 3350
DTC Confirmation Procedure .......................... 3350
Wiring Diagram ................................................ 3351
Diagnostic Procedure....................................... 3352
DTC P1706 PNP Switch..................................... 3355
Component Description ................................... 3355CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3355
ECM Terminals and Reference Value ............. 3355
On Board Diagnosis Logic ............................... 3355
DTC Confirmation Procedure .......................... 3356
Overall Function Check ................................... 3357
Wiring Diagram ................................................ 3358
Diagnostic Procedure....................................... 3359
Ignition Signal..................................................... 3361
Component Description ................................... 3361
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3361
ECM Terminals and Reference Value ............. 3362
Wiring Diagram ................................................ 3363
Diagnostic Procedure....................................... 3365
Injector................................................................. 3369
Component Description ................................... 3369
ECM Terminals and Reference Value ............. 3369
Wiring Diagram ................................................ 3370
Diagnostic Procedure....................................... 3371
Start Signal......................................................... 3374
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3374
ECM Terminals and Reference Value ............. 3374
Wiring Diagram ................................................ 3375
Diagnostic Procedure....................................... 3376
Fuel Pump........................................................... 3378
System Description .......................................... 3378
Component Description ................................... 3378
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3378
ECM Terminals and Reference Value ............. 3379
Wiring Diagram ................................................ 3380
Diagnostic Procedure....................................... 3381
Power Steering Oil Pressure Switch................ 3385
Component Description ................................... 3385
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3385
ECM Terminals and Reference Value ............. 3385
Wiring Diagram ................................................ 3386
Diagnostic Procedure....................................... 3387
IACV-FICD Solenoid Valve................................ 3389
Component Description ................................... 3389
ECM Terminals and Reference Value ............. 3389
Wiring Diagram ................................................ 3390
Diagnostic Procedure....................................... 3392
MI & Data Link Connectors............................... 3396
Wiring Diagram ................................................ 3396
Service Data and Specifications (SDS)............ 3398
Fuel Pressure Regulator .................................. 3398
Idle Speed and Ignition Timing ........................ 3398
Ignition Coil ...................................................... 3398
Mass Air Flow Sensor...................................... 3398
Engine Coolant Temperature Sensor .............. 3398
EC-3004

Fuel Pump........................................................ 3398
IACV-AAC Valve .............................................. 3398
Injector ............................................................. 3398
Throttle Position Sensor .................................. 3399
Heated Oxygen Sensor 1 Heater .................... 3399
Calculated Load Value..................................... 3399
Intake Air Temperature Sensor ....................... 3399
Heated Oxygen Sensor 2 Heater .................... 3399
Crankshaft Position Sensor (OBD) .................. 3399
YD25DDTi
TROUBLE DIAGNOSIS - INDEX........................ 3400
Alphabetical & Numerical Index for DTC......... 3400
PRECAUTIONS................................................... 3402
Precautions ...................................................... 3402
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM............................................................... 3405
Engine Control Component Parts Location ..... 3405
Circuit Diagram ................................................ 3408
System Diagram .............................................. 3409
System Chart ................................................... 3410
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION..................................... 3411
Fuel Injection Control System.......................... 3411
Fuel Injection Timing Control System.............. 3413
Air Conditioning Cut Control ............................ 3413
Fuel Cut Control (at no load & high engine
speed) .............................................................. 3413
Crankcase Ventilation System ......................... 3414
BASIC SERVICE PROCEDURE......................... 3415
Injection Tube and Injection Nozzle ................ 3415
Electronic Control Fuel Injection Pump ........... 3419
Air Bleeding...................................................... 3426
Water Draining ................................................. 3426
Accelerator Position Sensor Idle Position
Learning ........................................................... 3427
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION..................................................... 3428
DTC and MIL Detection Logic ......................... 3428
Diagnostic Trouble Code (DTC) ...................... 3428
Malfunction Indicator Lamp (MIL) .................... 3429
CONSULT-II ..................................................... 3434
TROUBLE DIAGNOSIS - INTRODUCTION........ 3440
Introduction ...................................................... 3440
Work Flow ........................................................ 3442
TROUBLE DIAGNOSIS - BASIC INSPECTION. 3444
Basic Inspection ............................................... 3444
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION..................................................... 3450
Symptom Matrix Chart ..................................... 3450
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3460Major Sensor Reference Graph in Data
Monitor Mode ................................................... 3462
ECM Terminals and Reference Value ............. 3463
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT............................................................. 3469
Description ....................................................... 3469
Diagnostic Procedure....................................... 3469
TROUBLE DIAGNOSIS FOR POWER SUPPLY3470
Main Power Supply and Ground Circuit .......... 3470
DTC 0103 COOLANT TEMP SEN...................... 3480
Description ....................................................... 3480
On Board Diagnosis Logic ............................... 3480
DTC Confirmation Procedure .......................... 3480
Wiring Diagram ................................................ 3481
Diagnostic Procedure....................................... 3482
DTC 0104 VEHICLE SPEED SEN...................... 3484
Description ....................................................... 3484
ECM Terminals and Reference Value ............. 3484
On Board Diagnosis Logic ............................... 3484
Overall Function Check ................................... 3485
Wiring Diagram ................................................ 3486
Diagnostic Procedure....................................... 3488
DTC 0208 OVER HEAT....................................... 3489
Description ....................................................... 3489
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3489
ECM Terminals and Reference Value ............. 3490
On Board Diagnosis Logic ............................... 3490
Overall Function Check ................................... 3491
Wiring Diagram ................................................ 3492
Diagnostic Procedure....................................... 3493
Main 12 Causes of Overheating ...................... 3500
DTC 0301 ECM 2, DTC 901 ECM 12................. 3501
Description ....................................................... 3501
On Board Diagnosis Logic ............................... 3501
DTC Confirmation Procedure .......................... 3501
Diagnostic Procedure....................................... 3502
DTC 0401 INTAKE AIR TEMPERATURE
SENSOR.............................................................. 3503
Component Description ................................... 3503
On Board Diagnosis Logic ............................... 3503
DTC Confirmation Procedure .......................... 3503
Wiring Diagram ................................................ 3505
Diagnostic Procedure....................................... 3506
DTC 0402 P9zFUEL TEMP SEN......................... 3508
Description ....................................................... 3508
CONSULT-II Reference Value in Data Monitor
Mode ................................................................ 3509
ECM Terminals and Reference Value ............. 3509
On Board Diagnosis Logic ............................... 3510
DTC Confirmation Procedure .......................... 3510
Wiring Diagram ................................................ 3511
Diagnostic Procedure....................................... 3513
EC-3005

Special Service ToolsNEEC0007The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10117100
(J36471-A)
Heated oxygen sensor
wrench
NT379
Loosening or tightening heated oxygen sensor 1
with 22 mm (0.87 in) hexagon nut
KV10114400
(J-38365)
Heated oxygen sensor
wrench
NT636
Loosening or tightening heated oxygen sensor 2
a: 22 mm (0.87 in)
(J-45178)
TPS test connector
LEC120A
Used to test the throttle position sensor
Commercial Service ToolsNEEC0008
Tool name Description
Fuel filler cap adapter
NT653
Checking fuel tank vacuum relief valve opening
pressure
Socket wrench
NT705
Removing and installing engine coolant tempera-
ture sensor
PREPARATIONKA24DE (EURO OBD)
Special Service Tools
EC-3016

Evaporative Emission System
DESCRIPTION=NEEC0018
SEC310D
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating.
EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow
rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as
the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and
idling.
SEF917W
INSPECTIONNEEC0019EVAP CanisterNEEC0019S01Check EVAP canister as follows:
1. Block port B. Orally blow air through port A. Check that air
flows freely through port C with check valve resistance.
2. Block port A. Orally blow air through port B. Check that air
flows freely through port C.
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
Evaporative Emission System
EC-3029

SEF427N
SEF943S
Fuel Tank Vacuum Relief Valve (Built into fuel filler cap)NEEC0019S031. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
Pressure:
16.0 - 20.0 kPa (0.16 - 0.20 bar, 0.163 - 0.204 kg/cm
2,
2.32 - 2.90 psi)
Vacuum:
þ6.0 to þ3.5 kPa (þ0.06 to þ0.35 bar, þ0.061 to þ0.036
kg/cm
2, þ0.87 to þ0.51 psi)
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine NISSAN fuel filler cap as a replacement. If
an incorrect fuel filler cap is used, the MI may come on.
Evaporative Emission (EVAP) Canister Purge Volume
Control Solenoid Valve
NEEC0019S06Refer to EC-3283.
Checking EVAP Vapor LinesNEEC0019S131. Visually inspect vapor lines for leaks, cracks, damage, loose
connections, chafing and deterioration.
2. Inspect vacuum relief valve of fuel tank filler cap for clogging,
sticking, etc. Refer to EC-3030.
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
Evaporative Emission System
EC-3030

Positive Crankcase Ventilation
DESCRIPTIONNEEC0022
AEC042B
This system returns blow-by gas to the intake collector.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV
valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air duct into the crankcase. In this process the air passes through
the hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some
of the flow will go through the hose connection to the intake collector under all conditions.
SEC137A
INSPECTIONNEEC0023PCV (Positive Crankcase Ventilation) ValveNEEC0023S01With engine running at idle, remove PCV valve from breather sepa-
rator. A properly working valve makes a hissing noise as air passes
through it. A strong vacuum should be felt immediately when a fin-
ger is placed over the valve inlet.
ET277
Ventilation HoseNEEC0023S021. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace.
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
Positive Crankcase Ventilation
EC-3032

SEC305D
PEF823K
Fuel Pressure ReleaseNEEC0024Before disconnecting fuel line, release fuel pressure from fuel
line to eliminate danger.
WITH CONSULT-IINEEC0024S011. Start engine.
2. Perform ªFUEL PRESSURE RELEASEº in ªWORK SUP-
PORTº mode with CONSULT-II.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch OFF.
SEC306D
WITHOUT CONSULT-IINEEC0024S021. Remove fuse for fuel pump.
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch OFF and reconnect fuel pump fuse.
AEC064B
SEF318V
Fuel Pressure CheckNEEC0025+When reconnecting fuel line, always use new clamps.
+Make sure that clamp screw does not contact adjacent
parts.
+Use a torque driver to tighten clamps.
+Use Pressure Gauge to check fuel pressure.
+Do not perform fuel pressure check with system operat-
ing. Fuel pressure gauge may indicate false readings.
1. Release fuel pressure to zero.
2. Disconnect fuel hose between fuel filter and fuel tube (engine
side).
3. Install pressure gauge between fuel filter and fuel tube.
4. Start engine and check for fuel leakage.
5. Read the indication of fuel pressure gauge.
At idle speed:
With vacuum hose connected
Approximately 235 kPa (2.35 bar, 2.4 kg/cm
2,34
psi)
With vacuum hose disconnected
Approximately 294 kPa (2.94 bar, 3.0 kg/cm
2,43
psi)
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Fuel Pressure Release
EC-3033

If results are unsatisfactory, perform Fuel Pressure Regulator
Check, EC-3034.
SEF718B
Fuel Pressure Regulator CheckNEEC00261. Stop engine and disconnect fuel pressure regulator vacuum
hose from intake manifold.
2. Plug intake manifold with a rubber cap.
3. Connect variable vacuum source to fuel pressure regulator.
4. Start engine and read indication of fuel pressure gauge as
vacuum is changed.
Fuel pressure should decrease as vacuum increases. If results
are unsatisfactory, replace fuel pressure regulator.
SEF319V
SEF116V
SEF117V
Injector
REMOVAL AND INSTALLATIONNEEC00271. Release fuel pressure to zero.
2. Remove injector tube assembly with injectors from intake
manifold.
3. Remove injectors from injector tube assembly.
+Push injector tail piece.
+Do not pull on the connector.
4. Install injector to fuel tube assembly.
a. Clean exterior of injector tail piece.
b. Use new O-rings.
Always replace O-rings with new ones.
Lubricate O-rings with a smear of engine oil.
5. Install injectors with fuel tube assembly to intake manifold.
Tighten in numerical order shown in the figure.
a. First, tighten all bolts to 9.3 to 10.8 N´m (0.95 to 1.1 kg-m, 6.9
to 8.0 ft-lb).
b. Then, tighten all bolts to 21 to 26 N´m (2.1 to 2.7 kg-m, 15 to
20 ft-lb).
6. Install fuel hoses to fuel tube assembly.
7. Reinstall any parts removed in reverse order of removal.
CAUTION:
After properly connecting injectors to fuel tube assembly,
check connections for fuel leakage.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Fuel Pressure Check
EC-3034