2003 NISSAN ALMERA N16 relay

Description=NJGI0003S02
Number Item Description
1 Power conditionThis shows the condition when the system receives battery positive voltage (can be
operated).
2 Fusible linkThe double line shows that this is a fusible link.
The open circle shows current flow in, and the shaded circle shows current flow out.
3Fusible link/fuse loca-
tionThis shows the location of the fusible link or fuse in the fusible link or fusebox.For
arrangement, refer to EL-12, “POWER SUPPLY ROUTING”.
4FuseThe single line shows that this is a fuse.
The open circle shows current flow in, and the shaded circle shows current flow out.
5 Current rating This shows the current rating of the fusible link or fuse.
6 ConnectorsThis shows that connector E3 is female and connector M1 is male.
The G/R wire is located in the 1A terminal of both connectors.
Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ con-
nector. Refer to GI-20.
7 Optional splice The open circle shows that the splice is optional depending on vehicle application.
8 Splice The shaded circle shows that the splice is always on the vehicle.
9 Page crossingThis arrow shows that the circuit continues to an adjacent page.
The A will match with the A on the preceding or next page.
10 Common connectorThe dotted lines between terminals show that these terminals are part of thesamecon-
nector.
11 Option abbreviation This shows that the circuit is optional depending on vehicle application.
12 RelayThis shows an internal representation of the relay. For details, refer to EL-9, “STAN-
DARDIZED RELAY”.
13 Connectors This shows that the connector is connected to the body or a terminal with bolt or nut.
14 Wire colorThis shows a code for the color of the wire.
B=Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light GreenBR = Brown
OR = Orange
P = Pink
PU = Purple
GY = Gray
SB = Sky Blue
CH = Dark Brown
DG=DarkGreen
When the wire color is striped, the base color is given first, followed by the stripe color as
shown below:
Example: L/W = Blue with White Stripe
15 Option description This shows a description of the option abbreviationused on the page.
16 SwitchThis shows that continuity exists between terminals 1 and 2 when the switchis in the A
position. Continuity exists between terminals 1 and 3 when the switch is inthe B posi-
tion.
17 Assembly parts Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell codeThis identifies each page of the wiring diagram by section, system and wiring diagram
page number.
19 Current flow arrowArrow indicates electric current flow, especially where the direction ofstandard flow (ver-
tically downward or horizontally from left to right) is difficult to follow.
A double arrow “
” shows that current can flow in either direction depending on cir-
cuit operation.
HOW TO READ WIRING DIAGRAMS
Description
GI-14

Incident Simulation TestsNJGI0005S02INTRODUCTIONNJGI0005S0201Sometimes the symptom is not present when the vehicle is brought
in for service. If possible, re-create the conditions present at the
time of the incident. Doing so may help avoid a No Trouble Found
Diagnoses. The following section illustrates ways to simulate the
conditions/environment under which the owner experiences an
electrical incident.
The section is broken into the six following topics:
Vehicle vibration
Heat sensitive
Freezing
Water intrusion
Electrical load
Cold or hot start up
Get a thorough description of the incident from the customer. It is
important for simulating the conditions of the problem.
VEHICLE VIBRATIONNJGI0005S0202The problem may occur or become worse while driving on a rough
road or when engine is vibrating (idle with A/C on). In such a case,
you will want to check for a vibration related condition. Refer to the
illustration below.
Connectors & Harness
Determine which connectors and wiring harness would affect the
electrical system you are inspecting.Gentlyshake each connec-
tor and harness while monitoring the system for the incident you
are trying to duplicate. This test may indicate a loose or poor elec-
trical connection.
Hint
Connectors can be exposed to moisture. It is possible to get a thin
film of corrosion on the connector terminals. A visual inspection
may not reveal this without disconnecting the connector. If the
problem occurs intermittently, perhaps the problem is caused by
corrosion. It is a good idea to disconnect, inspect and clean the
terminals on related connectors in the system.
Sensors & Relays
Gentlyapply a slight vibration to sensors and relays in the system
you are inspecting.
This test may indicate a loose or poorly mounted sensor or relay.
SGI839
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HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT
Incident Simulation Tests
GI-23

TESTING FOR “OPENS” IN THE CIRCUITNJGI0005S0302Before you begin to diagnose and test the system, you should
rough sketch a schematic of the system. This will help you to logi-
cally walk through the diagnoses process. Drawing the sketch will
also reinforce your working knowledge of the system.
SGI846
Continuity Check Method
The continuity check is used to find an open in the circuit. The
Digital Multimeter (DMM) set on the resistance function will indicate
an open circuit as over limit (no beep tone or no ohms symbol).
Make sure to always start with the DMM at the highest resistance
level.
To help in understanding the diagnoses of open circuits please
refer to the schematic above.
1) Disconnect the battery negative cable.
2) Start at one end of the circuit and work your way to the other
end. (At the fuse block in this example)
3) Connect one probe of the DMM to the fuse block terminal on
the load side.
4) Connect the other probe to the fuse block (power) side of SW1.
Little or no resistance will indicate that portion of the circuit has
good continuity. If there were an open in the circuit, the DMM
would indicate an over limit or infinite resistance condition.
(point A)
5) Connect the probes between SW1 and the relay. Little or no
resistance will indicate that portion of the circuit has good con-
tinuity. If there were an open in the circuit, the DMM would
indicate an over limit or infinite resistance condition. (point B)
6) Connect the probes between the relay and the solenoid. Little
or no resistance will indicate that portion of the circuit has good
continuity. If there were an open in the circuit, the DMM would
indicate an over limit or infinite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the above
example.
Voltage Check Method
To help in understanding the diagnoses of open circuits please
refer to the previous schematic.
In any powered circuit, an open can be found by methodically
checking the system for the presence of voltage. This is done by
switching the DMM to the voltage function.
1) Connect one probe of the DMM to a known good ground.
2) Begin probing at one end of the circuit and work your way to
the other end.
3) With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).
4) Close SW1 and probe at relay.
HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont’d)
GI-26

voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).
5) Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the
above example.
TESTING FOR “SHORTS” IN THE CIRCUITNJGI0005S0303To simplify the discussion of shorts in the system please refer to
the schematic below.
SGI847
Resistance Check Method
1) Disconnect the battery negative cable and remove the blown
fuse.
2) Disconnect all loads (SW1 open, relay disconnected and sole-
noid disconnected) powered through the fuse.
3) Connect one probe of the ohmmeter to the load side of the fuse
terminal. Connect the other probe to a known good ground.
4) With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
5) Close SW1 and disconnect the relay. Put probes at the load
side of fuse terminal and a known good ground. Then, check
for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
6) Close SW1 and jump the relay contacts with jumper wire. Put
probes at the load side of fuse terminal and a known good
ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
Voltage Check Method
1) Remove the blown fuse and disconnect all loads (i.e. SW1
open, relay disconnected and solenoid disconnected) powered
through the fuse.
2) Turn the ignition key to the ON or START position. Verify bat-
tery voltage at the B + side of the fuse terminal (one lead on
the B + terminal side of the fuse block and one lead on a known
good ground).
3) With SW1 open and the DMM leads across both fuse
terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
no voltage; short is further down the circuit than SW1.
4) With SW1 closed, relay and solenoid disconnected and the
DMM leads across both fuse terminals, check for voltage.
voltage; short is between SW1 and the relay (point B).
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HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont’d)
GI-27

no voltage; short is further down the circuit than the relay.
5) With SW1 closed, relay contacts jumped with fused jumper
wire check for voltage.
voltage; short is down the circuit of the relay or between the
relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
GROUND INSPECTIONNJGI0005S0304Ground connections are very important to the proper operation of
electrical and electronic circuits. Ground connections are often
exposed to moisture, dirt and other corrosive elements. The corro-
sion (rust) can become an unwanted resistance. This unwanted
resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper
grounding. A loose or corroded ground can drastically affect an
electronically controlled circuit. A poor or corroded ground can eas-
ily affect the circuit. Even when the ground connection looks clean,
there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
1) Remove the ground bolt or screw.
2) Inspect all mating surfaces for tarnish, dirt, rust, etc.
3) Clean as required to assure good contact.
4) Reinstall bolt or screw securely.
5) Inspect for “add-on” accessories which may be interfering with
the ground circuit.
6) If several wires are crimped into one ground eyelet terminal,
check for proper crimps. Make sure all of the wires are clean,
securely fastened and providing a good ground path. If multiple
wires are cased in one eyelet make sure no ground wires have
excess wire insulation.
SGI853
VOLTAGE DROP TESTSNJGI0005S0305Voltage drop tests are often used to find components or circuits
which have excessive resistance. A voltage drop in a circuit is
caused by a resistancewhen the circuit is in operation.
Check the wire in the illustration. When measuring resistance with
ohmmeter, contact by a single strand of wire will give reading of 0
ohms. This would indicate a good circuit. When the circuit operates,
this single strand of wire is not able to carry the current. The single
HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont’d)
GI-28

EC-4
On Board Diagnosis Logic ....................................276
DTC Confirmation Procedure ...............................276
Diagnostic Procedure ...........................................277
Removal and Installation ......................................277
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION ..............................................................278
Description ............................................................278
On Board Diagnosis Logic ....................................278
DTC Confirmation Procedure ...............................278
Wiring Diagram .....................................................279
Diagnostic Procedure ...........................................280
Component Inspection ..........................................284
Removal and Installation ......................................284
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .....................................................................285
Component Description ........................................285
CONSULT-II Reference Value in Data Monitor Mode
.285
On Board Diagnosis Logic ....................................285
DTC Confirmation Procedure ...............................285
Wiring Diagram .....................................................287
Diagnostic Procedure ...........................................288
Component Inspection ..........................................289
DTC P1128 THROTTLE CONTROL MOTOR .........291
Component Description ........................................291
On Board Diagnosis Logic ....................................291
DTC Confirmation Procedure ...............................291
Wiring Diagram .....................................................292
Diagnostic Procedure ...........................................293
Component Inspection ..........................................294
Removal and Installation ......................................295
DTC P1143 HO2S1 .................................................296
Component Description ........................................296
CONSULT-II Reference Value in Data Monitor Mode
.296
On Board Diagnosis Logic ....................................296
DTC Confirmation Procedure ...............................297
Overall Function Check ........................................298
Diagnostic Procedure ...........................................298
Component Inspection ..........................................300
Removal and Installation ......................................301
DTC P1144 HO2S1 .................................................302
Component Description ........................................302
CONSULT-II Reference Value in Data Monitor Mode
.302
On Board Diagnosis Logic ....................................302
DTC Confirmation Procedure ...............................303
Overall Function Check ........................................304
Diagnostic Procedure ...........................................304
Component Inspection ..........................................306
Removal and Installation ......................................307
DTC P1146 HO2S2 ...............................................
..308
Component Description ........................................308
CONSULT-II Reference Value in Data Monitor Mode
.308
On Board Diagnosis Logic ....................................308
DTC Confirmation Procedure ...............................308
Overall Function Check ........................................310
Wiring Diagram .....................................................311Diagnostic Procedure ............................................312
Component Inspection ..........................................314
Removal and Installation .......................................315
DTC P1147 HO2S2 ..................................................316
Component Description ........................................316
CONSULT-II Reference Value in Data Monitor Mode
.316
On Board Diagnosis Logic ....................................316
DTC Confirmation Procedure ................................317
Overall Function Check .........................................318
Wiring Diagram .....................................................319
Diagnostic Procedure ............................................320
Component Inspection ..........................................322
Removal and Installation .......................................323
DTC P1217 ENGINE OVER TEMPERATURE ........324
System Description ...............................................324
CONSULT-II Reference Value in Data Monitor Mode
.324
On Board Diagnosis Logic ....................................325
Overall Function Check .........................................325
Wiring Diagram .....................................................327
Diagnostic Procedure ............................................328
Main 12 Causes of Overheating ...........................333
Component Inspection ..........................................334
DTC P1223, P1224 TP SENSOR ............................335
Component Description ........................................335
CONSULT-II Reference Value in Data Monitor Mode
.335
On Board Diagnosis Logic ....................................335
DTC Confirmation Procedure ................................335
Wiring Diagram .....................................................337
Diagnostic Procedure ............................................338
Component Inspection ..........................................340
Removal and Installation .......................................340
DTC P1225 TP SENSOR ........................................341
Component Description ........................................341
On Board Diagnosis Logic ....................................341
DTC Confirmation Procedure ................................341
Diagnostic Procedure ............................................342
Removal and Installation .......................................342
DTC P1226 TP SENSOR ........................................343
Component Description ........................................343
On Board Diagnosis Logic ....................................343
DTC Confirmation Procedure ................................343
Diagnostic Procedure ............................................344
Removal and Installation .......................................344
DTC P1227, P1228 APP SENSOR .........................345
Component Description ........................................345
CONSULT-II Reference Value in Data Monitor Mode
.345
On Board Diagnosis Logic ....................................345
DTC Confirmation Procedure ................................345
Wiring Diagram .....................................................347
Diagnostic Procedure ............................................348
Component Inspection ..........................................350
Removal and Installation .......................................351
DTC P1229 SENSOR POWER SUPPLY ................352
On Board Diagnosis Logic ....................................352
DTC Confirmation Procedure ................................352

EC-7
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ECA Component Inspection ......................................... 548
Removal and Installation ...................................... 549
DTC P0327, P0328 KS ........................................... 550
Component Description ........................................ 550
On Board Diagnosis Logic ................................... 550
DTC Confirmation Procedure ............................... 550
Wiring Diagram .................................................... 551
Diagnostic Procedure ........................................... 552
Component Inspection ......................................... 553
Removal and Installation ...................................... 553
DTC P0335 CKP SENSOR (POS) .......................... 554
Component Description ........................................ 554
CONSULT-II Reference Value in Data Monitor Mode
. 554
On Board Diagnosis Logic ................................... 554
DTC Confirmation Procedure ............................... 554
Wiring Diagram .................................................... 556
Diagnostic Procedure ........................................... 557
Component Inspection ......................................... 559
Removal and Installation ...................................... 560
DTC P0340 CMP SENSOR (PHASE) ..................... 561
Component Description ........................................ 561
On Board Diagnosis Logic ................................... 561
DTC Confirmation Procedure ............................... 561
Wiring Diagram .................................................... 563
Diagnostic Procedure ........................................... 564
Component Inspection ......................................... 566
Removal and Installation ...................................... 567
DTC P0605 ECM .................................................... 568
Component Description ........................................ 568
On Board Diagnosis Logic ................................... 568
DTC Confirmation Procedure ............................... 568
Diagnostic Procedure ........................................... 570
DTC P1065 ECM POWER SUPPLY ....................... 571
Component Description ........................................ 571
On Board Diagnosis Logic ................................... 571
DTC Confirmation Procedure ............................... 571
Wiring Diagram .................................................... 572
Diagnostic Procedure ........................................... 573
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ 575
Component Description ........................................ 575
On Board Diagnosis Logic ................................... 575
DTC Confirmation Procedure ............................... 575
Diagnostic Procedure ........................................... 576
Removal and Installation ...................................... 577
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................. 578
Description ..........................................................
. 578
On Board Diagnosis Logic ................................... 578
DTC Confirmation Procedure ............................... 578
Wiring Diagram .................................................... 579
Diagnostic Procedure ........................................... 580
Component Inspection ......................................... 584
Removal and Installation ...................................... 584
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .................................................................... 585
Component Description ........................................ 585
CONSULT-II Reference Value in Data Monitor Mode .585
On Board Diagnosis Logic ....................................585
DTC Confirmation Procedure ...............................585
Wiring Diagram .....................................................587
Diagnostic Procedure ...........................................588
Component Inspection ..........................................590
DTC P1128 THROTTLE CONTROL MOTOR .........591
Component Description ........................................591
On Board Diagnosis Logic ....................................591
DTC Confirmation Procedure ...............................591
Wiring Diagram .....................................................592
Diagnostic Procedure ...........................................593
Component Inspection ..........................................594
Removal and Installation ......................................595
DTC P1217 ENGINE OVER TEMPERATURE ........596
System Description ...............................................596
CONSULT-II Reference Value in Data Monitor Mode
.596
On Board Diagnosis Logic ....................................597
Overall Function Check ........................................597
Wiring Diagram .....................................................599
Diagnostic Procedure ...........................................600
Main 12 Causes of Overheating ...........................605
Component Inspection ..........................................606
DTC P1223, P1224 TP SENSOR ............................607
Component Description ........................................607
CONSULT-II Reference Value in Data Monitor Mode
.607
On Board Diagnosis Logic ....................................607
DTC Confirmation Procedure ...............................607
Wiring Diagram .....................................................609
Diagnostic Procedure ...........................................610
Component Inspection ..........................................612
Removal and Installation ......................................612
DTC P1225 TP SENSOR ........................................613
Component Description ........................................613
On Board Diagnosis Logic ....................................613
DTC Confirmation Procedure ...............................613
Diagnostic Procedure ...........................................614
Removal and Installation ......................................614
DTC P1226 TP SENSOR .......................................
.615
Component Description ........................................615
On Board Diagnosis Logic ....................................615
DTC Confirmation Procedure ...............................615
Diagnostic Procedure ...........................................616
Removal and Installation ......................................616
DTC P1227, P1228 APP SENSOR .........................617
Component Description ........................................617
CONSULT-II Reference Value in Data Monitor Mode
.617
On Board Diagnosis Logic ....................................617
DTC Confirmation Procedure ...............................617
Wiring Diagram .....................................................619
Diagnostic Procedure ...........................................620
Component Inspection ..........................................622
Removal and Installation ......................................623
DTC P1229 SENSOR POWER SUPPLY ................624
On Board Diagnosis Logic ....................................624
DTC Confirmation Procedure ...............................624

ENGINE CONTROL SYSTEM
EC-23
[QG (WITH EURO-OBD)]
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System ChartEBS00K34
*1: This sensor is not used to control the engine system under normal conditions.
*2: The signals are sent to the ECM through CAN communication line.
*3: The output signals are sent from the ECM through CAN communication line.
Multiport Fuel Injection (MFI) SystemEBS00K35
INPUT/OUTPUT SIGNAL CHART
*1: Under normal conditions, this sensor is not for engine control operation.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
Input (Sensor) ECM Function Output (Actuator)
●Camshaft position sensor (PHASE)
●Crankshaft position sensor (POS)
●Mass air flow sensor
●Engine coolant temperature sensor
●Heated oxygen sensor 1
●Throttle position sensor
●Accelerator pedal position sensor
●Park/neutral position (PNP) switch
●Intake air temperature sensor
●Power steering pressure sensor
●Ignition switch
●Stop lamp switch
●Battery voltage
●Knock sensor
●Refrigerant pressure sensor
●Heated oxygen sensor 2*1
●TCM (Transmission control module)*2
●Air conditioner switch*2
●Vehicle speed signal*2
●Electrical load signal*2
Fuel injection & mixture ratio control Fuel injectors
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
On board diagnostic system
MI (On the instrument panel)
*3
Intake valve timing controlIntake valve timing control solenoid
valve
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control
Air conditioner relay
*3
Cooling fan control
Cooling fan relay*3
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
*3 and piston position
Fuel injection & mixture
ratio controlFuel injectors Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery
Battery voltage
*3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2
*1Density of oxygen in exhaust gas
Vehicle speed signal
*2Vehicle speed
Air conditioner switch
*2Air conditioner operation