2003 NISSAN ALMERA N16 Engine compartment

ATC-30
TROUBLE DIAGNOSIS
Component Parts and Harness Connector Location
EJS001ZD
ENGINE COMPARTMENT
RJIA1678E

ATC-100
TROUBLE DIAGNOSIS
Ambient Sensor Circuit
EJS001ZV
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor is attached on the radiator core upper support. It
detects ambient temperature and converts it into a resistance value
which is then input into the auto amplifier.
AMBIENT TEMPERATURE INPUT PROCESS
The automatic amplifier includes a processing circuit for the ambient sensor input. However, when the temper-
ature detected by the ambient sensor increases quickly, the processing circuit retards the auto amp. function.
It only allows the auto amp. to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 seconds.
As an example, consider stopping for a cup of coffee after high speed driving. Although the actual ambient
temperature has not changed, the temperature detected by the ambient sensor will increase. This is because
the heat from the engine compartment can radiate to the front grille area, location of the ambient sensor.
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR
SYMPTOM: Ambient sensor circuit is open or shorted. (21 or -21 is
indicated on auto amp. As a result of conducting Self-diagnosis
STEP 2.)
1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR HARNESS CONNECTOR AND GROUND
Disconnect ambient sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA1712E
RHA051GA
Terminal
Voltage (+)
(-)
Ambient sen-
sor connectorTerminal No.
(Wire color)
E219 1 (W/G) Ground Approx. 5V
RJIA0681E

REFRIGERANT LINES
ATC-145
C
D
E
F
G
H
I
K
L
MA
B
AT C
2. Install the evaporator to heater & cooling unit.
3. Install the lower cover, then slide evaporator to forward.
4. Install the expansion valve from engine compartment
Checking for Refrigerant LeaksEJS0020U
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent
dye leak detector.
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
Checking System for Leaks Using the Fluorescent Leak DetectorEJS0020V
1. Check A/C system for leaks using the UV lamp and safety glasses (J-42220) in a low sunlight area (area
without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a bright
green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain opening indi-
cates an evaporator core assembly (tubes, core or expansion valve) leak.
2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth, with the UV lamp for dye residue.
3. After the leak is repaired, remove any residual dye using dye cleaner (J-43872) to prevent future misdiag-
nosis.
4. Perform a system performance check and verify the leak repair with an approved electronic refrigerant
leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.
RJIA0841E
Expansion valve mounting bolts
Tightening torque :2.9 - 5.0 N·m (0.30 - 0.50 kg·m, 26
- 44 in-lb)
RJIA0842E

BODY (ALIGNMENT)<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011>4
Alignment <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011[.............74ENGINE COMPARTMENT........................................75
UNDERBODY<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011001100110011>7
CONTENTS(Cont’d)
BT-2

Checking Body CorrosionNJBT0033Visually check the body sheet metal panel for corrosion, paint damage (scratches, chipping, rubbing, etc.) or
damage to the anti-corrosion materials. In particular, check the following locations.
Hemmed portion
Hood front end, door lower end, trunk lid rear end, etc.
Panel joint
Side sill of rear fender and center pillar, rear wheel housing of rear fender, around strut tower in engine
compartment, etc.
Panel edge
Trunk lid opening, sunroof opening, fender wheelarch flange, fuel fillerlid flange, around holes in panel, etc.
Parts contact
Waist molding, windshield molding, bumper, etc.
Protectors
Damage or condition of mudguard, fender protector, chipping protector, etc.
Anti-corrosion materials
Damage or separation of anti-corrosion materials under the body.
Drain holes
Condition of drain holes at door and side sill.
When repairing corroded areas, refer to the Corrosion Repair Manual.
CHASSIS AND BODY MAINTENANCE
Checking Body Corrosion
BT-6

ENGINE COMPARTMENTNJBT0026S01MeasurementNJBT0026S0101
SBT008A
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
HA
SC
EL
IDX
BODY (ALIGNMENT)
Alignment (Cont’d)
BT-75

Driving Test <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[..........499
Example of Symptoms Judged Not Abnormal ........500
Program Loading .....................................................508
CAN COMMUNICATION.............................................509
System Description ..................................................509
CAN Communication Unit........................................509
CAN SYSTEM (TYPE 1)..............................................512
Component Parts and Harness Connector
Location <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011[............512
System Description ..................................................512
Wiring Diagram - CAN - ..........................................513
Trouble Diagnoses...................................................515
Component Inspection .............................................529
CAN SYSTEM (TYPE 2)..............................................530
Component Parts and Harness Connector
Location <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011[............530
System Description ..................................................530
Wiring Diagram - CAN - ..........................................531
Trouble Diagnoses...................................................533
Component Inspection .............................................542
ELECTRICAL UNITS LOCATION...............................543
Engine Compartment ...............................................543Passenger Compartment/LHD Models ....................546
Passenger Compartment/RHD Models ...................548
HARNESS LAYOUT<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011>0
How to Read Harness Layout .................................550
Outline/Sedan ..........................................................551
Outline/Hatchback....................................................553
Main Harness<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.......556
Engine Room Harness ............................................560
Engine Control Harness/QG Engine Models...........566
Engine Control Harness/YD Engine Models ...........570
Body Harness/Sedan ...............................................578
Body Harness/Hatchback ........................................586
Room Lamp Harness...............................................590
Front Door Harness/LHD Models ............................591
Front Door Harness/RHD Models ...........................593
Rear Door Harness..................................................595
Back Door Harness .................................................597
BULB SPECIFICATIONS............................................598
Headlamp<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011[..........598
Exterior Lamp <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11[.......598
Interior Lamp<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11[.........598
WIRING DIAGRAM CODES (CELL CODES).............599
CONTENTS(Cont’d)
EL-4

System DescriptionNJEL0571MULTIFUNCTION SWITCH SYSTEMNJEL0571S01Refer to Owner′s Manual for multifunction switch operating instruc-
tions.
Using the multifunction switch at the center of the instrument panel,
the controls of the following systems are centralized:
Auto A/C system
Vehicle information system
Audio system
Navigation system
PRECAUTION OF LCD MONITORNJEL0571S02When passenger compartment temperature is low, the LCD
monitor sometimes dims because of the brightness of the back
light (small fluorescent light) integrated into the LCD monitor
decrease. In this case, the refreshing rate of the picture also
becomes low because of the low response of the LCD moni-
tor. When passenger compartment becomes warm, however,
the LCD recovers the normal display.
Sometimes, black or bright dots peculiar to LCD monitor can
be seen on the display.
Back light sometimes flickers or darkens according to the total
consumption hours and the number of ON and OFF switching.
In this case, the back light should be replaced (display unit
assembly).
POWER SUPPLY AND GROUNDNJEL0571S03Power is Supplied at All TimesNJEL0571S0301through 15A fuse (No. 40, located in fuse and fusible link box)
to display unit terminals 21 and 23
to audio unit terminals 3 and 4.
When Ignition Switch is in ACC or ON Position, Power
is Supplied
NJEL0571S0302through 10A fuse [No. 1, located in fuse block (J/B)]
to display unit terminal 19,
to multifunction switch terminal 6 and
to audio unit terminal 2.
When Ignition Switch is in ON or START Position,
Power is Supplied
NJEL0571S0303through 10A fuse [No. 10, located in fuse block (J/B)]
to display unit terminal 27.
Ground is SuppliedNJEL0571S0304to multifunction switch terminal 1 and
to display unit terminals 22 and 24
through body grounds M28, M67 and F118 (QG engine mod-
els).
AV COMMUNICATION LINENJEL0571S04Display unit is controlled by the following unit with AV communica-
tion line.
Multifunction switch
Audio unit
AV and NAVI control unit
LCD DISPLAY
System Description
EL-238