2001 NISSAN ALMERA N16 Code

JEM121G
3. Remove front chain case.
+Move power steering fluid reservoir tank from the bracket.
+Loosen fixing bolts in the reverse order of that shown in the
figure and remove them.
+Remove No. 6, 10, and 11 bolts with the rubber washer as
space is limited for pulling them out.
SEM514G
CAUTION:
+While front chain case is removed, cover openings to pre-
vent entry of foreign material into engine.
+Do not remove two mass dampers on the back of cover.
SEM515G
4. Set the No. 1 piston to TDC on its compression stroke.
+Turn crankshaft pulley clockwise so that the alignment mark
(punched mark) on each camshaft sprocket is positioned as
shown in the figure.
+No position indicator is provided on the crankshaft pulley.
+When installing, color coded links on the secondary tim-
ing chain can be used as alignment marks. Marking may
not be necessary for removal; however, make alignment
marks as required because the alignment mark on fuel
injection pump sprocket may not be easy to see.
JEM124G
5. Remove chain tensioner.
a. Push the plunger of chain tensioner and keep it pressed with
a push pin.
JEM125G
b. Using a hexagon-head wrench (face to face: 5 mm, SST),
remove bolts to remove chain tensioner.
TIMING CHAINYD
Secondary Timing Chain (Cont'd)
EM-94

JEM126G
6. Remove timing chain slack guide.
+Using a hexagon-head wrench (face to face: 6 mm, SST),
remove bolt to remove timing chain slack guide.
JEM127G
7. Remove timing chain tension guide.
8. Remove secondary timing chain.
+Timing chain alone can be removed without removing sprock-
ets.
SEM885F
INSPECTIONNJEM0093S02Check for cracks and excessive wear at roller links. Replace
chain if necessary.
JEM128G
INSTALLATIONNJEM0093S031. Install secondary timing chain.
+When installing, match the alignment marks on sprockets with
color coded alignment marks (colored links) on the chain.
2. Install timing chain tension guide.
+The upper bolt has a longer shank than the lower bolt.
TIMING CHAINYD
Secondary Timing Chain (Cont'd)
EM-95

JEM137G
2. Install power steering pump.
3. Install fuel injection pump.
+Before installing, make sure the notch on the fuel injection
pump flange and the hole 6 mm (0.24 in) in diameter on the
pump body are aligned.
4. Install chain guide and tension guides.
5. Install crankshaft sprocket, aligning it with the crankshaft key
on the far side.
JEM136G
6. Install primary timing chain with fuel injection pump sprocket.
+When installing, match the alignment marks on sprockets with
color coded alignment marks (colored links) on the chain.
+Install fuel injection pump sprocket washer with the surface
marked ªFº (front mark) facing the front of the engine.
7. Install timing chain onto power steering pump sprocket and
through chain guide.
JEM135G
8. Use the positioning stopper pin (SST) to hold the fuel injection
pump sprocket and install the bolt.
+Using a TORX wrench (SST), turn the pump shaft little by little
to adjust the position of the pump flange. Insert positioning
stopper pin (SST) into the hole 6 mm (0.24 in) in diameter on
the fuel injection pump sprocket so that the stopper pin goes
through the pump flange to the pump body. While the stopper
pin is in place, install the bolt.
JEM134G
9. Install timing chain slack guide.
10. Install chain tensioner.
+Push the plunger of the chain tensioner. While keeping plunger
pressed down with a push pin, etc., install the chain tensioner.
+After installation, pull out the push pin holding the plunger.
+Check again that the alignment marks on the sprockets
and the colored alignment marks on timing chain are
aligned.
JEM142G
11. Install front oil seal to oil pump.
+Using a suitable drift [62 mm (2.44 in) dia.], force fit the seal
until it hits the bottom.
+Do not touch lips of oil seal. Make sure seal surfaces are
free of foreign materials.
TIMING CHAINYD
Primary Timing Chain (Cont'd)
EM-103

YD
TROUBLE DIAGNOSIS - INDEX................................492
Alphabetical & P No. Index for DTC .......................492
PRECAUTIONS...........................................................494
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...........494
Engine Fuel & Emission Control System ................495
Precautions ..............................................................496
Wiring Diagrams and Trouble Diagnosis .................497
PREPARATION...........................................................498
Special Service Tools ..............................................498
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.......................................................................499
Engine Control Component Parts Location .............499
Circuit Diagram ........................................................502
System Diagram ......................................................503
System Chart ...........................................................504
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION.............................................505
Fuel Injection Control System .................................505
Fuel Injection Timing Control System......................506
Air Conditioning Cut Control ....................................507
Fuel Cut Control (at no load & high engine
speed) ......................................................................507
Crankcase Ventilation System .................................508
BASIC SERVICE PROCEDURE.................................509
Injection Tube and Injection Nozzle ........................509
Electronic Control Fuel Injection Pump ...................513
Fuel Filter .................................................................520
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION.............................................................522
DTC and MI Detection Logic ...................................522
Diagnostic Trouble Code (DTC) ..............................522
Malfunction Indicator (MI) ........................................523
CONSULT-II .............................................................527
TROUBLE DIAGNOSIS - INTRODUCTION................532
Introduction ..............................................................532
Work Flow ................................................................534
TROUBLE DIAGNOSIS - BASIC INSPECTION.........536
Basic Inspection.......................................................536
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION.............................................................541
Symptom Matrix Chart .............................................541
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................551
Major Sensor Reference Graph in Data Monitor
Mode ........................................................................553
ECM Terminals and Reference Value .....................554
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................559
Description ...............................................................559
Diagnostic Procedure ..............................................559TROUBLE DIAGNOSIS FOR POWER SUPPLY........560
Main Power Supply and Ground Circuit ..................560
DTC P0100 MASS AIR FLOW SEN...........................566
Component Description ...........................................566
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................566
ECM Terminals and Reference Value .....................566
On Board Diagnosis Logic.......................................566
DTC Confirmation Procedure ..................................566
Wiring Diagram ........................................................568
Diagnostic Procedure ..............................................569
DTC P0115 COOLANT TEMP SEN............................572
Description ...............................................................572
On Board Diagnosis Logic.......................................572
DTC Confirmation Procedure ..................................572
Wiring Diagram ........................................................574
Diagnostic Procedure ..............................................575
DTC P0120 ACCEL POS SENSOR............................577
Description ...............................................................577
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................577
ECM Terminals and Reference Value .....................577
On Board Diagnosis Logic.......................................578
DTC Confirmation Procedure ..................................578
Wiring Diagram ........................................................579
Diagnostic Procedure ..............................................580
DTC P0335 CRANK POS SEN (TDC)........................587
Description ...............................................................587
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................587
ECM Terminals and Reference Value .....................587
On Board Diagnosis Logic.......................................587
DTC Confirmation Procedure ..................................588
Wiring Diagram ........................................................589
Diagnostic Procedure ..............................................590
DTC P0500 VEHICLE SPEED SEN............................593
Description ...............................................................593
ECM Terminals and Reference Value .....................593
On Board Diagnosis Logic.......................................593
Overall Function Check ...........................................593
Wiring Diagram ........................................................595
Diagnostic Procedure ..............................................596
DTC P0571 BRAKE SW..............................................597
Description ...............................................................597
ECM Terminals and Reference Value .....................597
On Board Diagnosis Logic.......................................597
DTC Confirmation Procedure ..................................597
Wiring Diagram ........................................................599
Diagnostic Procedure ..............................................600
DTC P1107 ECM 10....................................................604
Description ...............................................................604
On Board Diagnosis Logic.......................................604
CONTENTS(Cont'd)
EC-7

IntroductionNJEC0029MODELS WITH EURO-OBD SYSTEMNJEC0029S01The ECM has an on board diagnostic system which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
Diagnostic Trouble Code (DTC) Mode 3 of ISO 15031-5
Freeze Frame data Mode 2 of ISO 15031-5
System Readiness Test (SRT) code Mode 1 of ISO 15031-5
1st Trip Diagnostic Trouble Code (1st Trip DTC) Mode 7 of ISO 15031-5
1st Trip Freeze Frame data
Test values and Test limits Mode 6 of ISO 15031-5
Calibration ID Mode 9 of ISO 15031-5
The above information can be checked using procedures listed in the table below.
X: Applicable Ð: Not applicable
DTC 1st trip DTCFreeze Frame
data1st trip Freeze
Frame dataSRT code Test value
ECM*3 X X*1ÐÐÐÐ
CONSULT-IIXXXXXÐ
GST X X*2 X Ð X X
*1: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
*2: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.
*3: In diagnostic test mode II (Self-diagnostic results), DTC is displayed on MI. DTC uses a set of four digit numbers. (If so equipped)
The malfunction indicator (MI) on the instrument panel lights up when the same malfunction is detected in two
consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-123.)
MODELS WITHOUT EURO-OBD SYSTEMNJEC0029S02The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
Diagnostic Trouble Code (DTC)
Freeze Frame data
1st Trip Diagnostic Trouble Code (1st Trip DTC)
1st Trip Freeze Frame data
The above information can be checked using procedures listed in the table below.
X: Applicable Ð: Not applicable
DTC 1st trip DTC Freeze Frame data1st trip Freeze Frame
data
CONSULT-II X X X X
ECM*1 X X*2 Ð Ð
*1: In diagnostic test mode II (Self-diagnostic results), (1st trip) DTC is displayed on the MI by a set of four digit numbers.
*2: When the DTC and the 1st trip DTC appear on the display simultaneously, it is difficult to clearly distinguish one from the other.
Two Trip Detection LogicNJEC0030MODELS WITH EURO-OBD SYSTEMNJEC0030S01When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in
the ECM memory. The MI will not light up at this stage <1st trip>.
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored
in the ECM memory, and the MI lights up. The MI lights up at the same time when the DTC is stored <2nd
trip>.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
Introduction
EC-57

System Readiness Test (SRT) CodeNJEC0031S0103System Readiness Test (SRT) code is specified in Mode 1 of ISO 15031-5.
As part of an emissions test for Inspection & Maintenance (I/M), certain states require the status of SRT be
used to indicate whether the ECM has completed self-diagnosis of major emission systems and components.
Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating ªINCMPº,
use the information in this Service Manual to set the SRT to ªCMPLTº.
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate ªCMPLTº for each application system. Once set as ªCMPLTº, the SRT status remains
ªCMPLTº until the self-diagnosis memory is erased.
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's
normal driving pattern; the SRT will indicate ªINCMPº for these items.
NOTE:
The SRT will also indicate ªINCMPº if the self-diagnosis memory is erased for any reason or if the ECM
memory power supply is interrupted for several hours.
If, during the state emissions inspection, the SRT indicates ªCMPLTº for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates ªINCMPº for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MI is ªONº during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates ªCMPLTº for all test items. Therefore, it is important to check SRT (ªCMPLTº) and
DTC (No DTCs) before the inspection.
SRT ItemNJEC0031S0107The table below shows required self-diagnostic items to set the SRT to ªCMPLTº.
SRT item
(CONSULT-II indica-
tion)Perfor-
mance Pri-
ority*1Required self-diagnostic items to set the SRT to ªCMPLTºCorresponding
DTC No.
CATALYST 3 Three way catalyst function P0420
O2 SENSOR 3 Heated oxygen sensor 1 (front) (circuit) P0130
Heated oxygen sensor 1 (front) (lean shift monitoring) P0131
Heated oxygen sensor 1 (front) (rich shift monitoring) P0132
Heated oxygen sensor 1 (front) (response monitoring) P0133
Heated oxygen sensor 1 (front) (high voltage) P0134
Heated oxygen sensor 2 (rear) (min. voltage monitoring) P0137
Heated oxygen sensor 2 (rear) (max. voltage monitoring) P0138
Heated oxygen sensor 2 (rear) (response monitoring) P0139
Heated oxygen sensor 2 (rear) (high voltage) P0140
O2 SEN HEATER 3 Front heated oxygen sensor 1 heater (front) P0135
Rear heated oxygen sensor 1 heater (rear) P0141
EGR SYSTEM
(If so equipped)3 EGR function (close) P0400
1 EGR function (open) P1402
*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority
for models with CONSULT-II.
SRT Set TimingNJEC0031S0108SRT is set as ªCMPLTº after self-diagnosis has been performed one or more times. Completion of SRT is done
regardless of whether the result is OK or NG. The set timing is different between OK and NG results and is
shown in the table below.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
Emission-related Diagnostic Information (Cont'd)
EC-60

NEF395A
*1 EC-58 *2 EC-62 *3 EC-63
How to Display SRT CodeNJEC0031S01101.With CONSULT-II
Selecting ªSRT STATUSº in ªDTC CONFIRMATIONº mode with CONSULT-II.
For items whose SRT codes are set, a ªCMPLTº is displayed on the CONSULT-II screen; for items whose
SRT codes are not set, ªINCMPº is displayed as shown below.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
Emission-related Diagnostic Information (Cont'd)
EC-62

SEF821Y
2.With GST
Selecting Mode 1 with GST (Generic Scan Tool)
How to Set SRT CodeNJEC0031S0111To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
With CONSULT-II
Perform corresponding DTC Confirmation Procedure one by one based on ªPerformance Priorityº in the table
on EC-122.
Without CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG
Emission-related Diagnostic Information (Cont'd)
EC-63