2008 NISSAN LATIO coolant

EC-94
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
: Vehicle front
1. Mass air flow sensor
(with intake air temperature sensor)2. Engine coolant temperature sensor 3. Electric throttle control actuator
(with built in throttle position sensor,
throttle control motor)
4. PCV valve 5. Cooling fan motor 6. Resistor
7. Refrigerant pressure sensor
BBIA0724E

TROUBLE DIAGNOSIS
EC-105
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
33 LG Throttle position sensor 1[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully releasedMore than 0.36V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressedLess than 4.75V
34 O Throttle position sensor 2[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully releasedLess than 4.75V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressedMore than 0.36V
36 YSensor ground
(Throttle position sensor)[Engine is running]
•Warm-up condition
• Idle speedApproximately 0V
37 W Knock sensor[Engine is running]
• Idle speedApproximately 2.5V
38 PEngine coolant temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with en-
gine coolant temperature.
40 —Sensor ground
(Knock sensor)[Engine is running]
•Warm-up condition
• Idle speedApproximately 0V
41 GR Refrigerant pressure sensor[Engine is running]
•Warm-up condition
• Both A/C switch and blower fan switch: ON
(Compressor operates.)1.0 - 4.0V
42 VEVAP control system pres-
sure sensor[Ignition switch: ON]Approximately 1.8 - 4.8V
43 PFuel tank temperature sen-
sor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature
44 BSensor ground
(Engine coolant temperature
sensor)[Engine is running]
•Warm-up condition
• Idle speedApproximately 0V
45 G Mass air flow sensor[Engine is running]
•Warm-up condition
• Idle speed0.8 - 1.1V
[Engine is running]
•Warm-up condition
• Engine speed: 2,500 rpm1.4 - 1.7V
46 VIntake air temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
48 BRSensor ground
(Refrigerant pressure sen-
sor)[Engine is running]
•Warm-up condition
• Idle speed
Approximately 0V
49 W A/F sensor 1[Engine is running]
•Warm-up condition
• Engine speed: 2,000 rpmApproximately 1.8V
Output voltage varies with air fuel
ratio. TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)

EC-110
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*
1 FREEZE
FRAME
DATA*
2
SRT
STATUSDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)××××
Camshaft position sensor (PHASE)××××
Mass air flow sensor×××
Engine coolant temperature sensor×××××
Air fuel ratio (A/F) sensor 1×××××
Heated oxygen sensor 2×××××
Wheel sensor××××
Accelerator pedal position sensor×××
Throttle position sensor× ×××
Fuel tank temperature sensor××××
EVAP control system pressure sen-
sor×××
Intake air temperature sensor××××
Knock sensor×
Refrigerant pressure sensor××
Closed throttle position switch (Ac-
celerator pedal position sensor sig-
nal)××
Air conditioner switch××
Park/neutral position (PNP) switch×××
Stop lamp switch×××
Battery voltage××
Load signal ××
Fuel level sensor×××
ASCD steering switch×××
ASCD brake switch×××
ASCD clutch switch×××
EPS control unit××

EC-112
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to EC-47, "Emission-related Diagnostic Information".
Freeze Frame Data and 1st Trip Freeze Frame Data
EVAP SYSTEM CLOSE CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.
•IGN SW “ON”
• ENGINE NOT RUNNING
• AMBIENT TEMPERATURE IS ABOVE 0°C (32°F).
• NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM
• FUEL TANK TEMP. IS MORE THAN 0°C (32°F).
• WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”
• WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
II WILL DISCONTINUE IT AND DISPLAY APPROPRIATE
INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN IN USING CHARGED BATTERY.When detecting EVAP vapor leak
point of EVAP system
TARGET IDLE RPM ADJ* • IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ* • IDLE CONDITION When adjusting target ignition tim-
ing
VIN REGISTRATION • IN THIS MODE, VIN IS REGISTERED IN ECM. When registering VIN in ECMWORK ITEM CONDITION USAGE
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX]• The engine control component part/control system has a trouble code, it is displayed as PXXXX.
(Refer to EC-9
)
FUEL SYS-B1• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One mode in the following is displayed.
Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop
CAL/LD VALUE [%] • The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP
[°C] or [°F]• The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]• “Long-term fuel trim” at the moment a malfunction is detected is displayed.
• The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule than
short-term fuel trim.
S-FUEL TRM-B1 [%]• “Short-term fuel trim” at the moment a malfunction is detected is displayed.
• The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel sched-
ule.
ENGINE SPEED [rpm] • The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED
[km/h] or [mph]• The vehicle speed at the moment a malfunction is detected is displayed.
ABSOL TH-P/S [%] • The throttle valve opening angle at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]• The base fuel schedule at the moment a malfunction is detected is displayed.

TROUBLE DIAGNOSIS
EC-113
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODE
Monitored Item
×: Applicable
INT/A TEMP SE
[°C] or [°F]• The intake air temperature at the moment a malfunction is detected is displayed.
FUEL SYS-B2
• Always a certain value is displayed.
• These items can not efficiently for C11 models. L-FUEL TRM-B2 [%]
S-FUEL TRM-B2 [%]
INT MANI PRES [kPa]
FTFMCH1Freeze frame data
item*Description
Monitored item [Unit]ECM IN-
PUT SIG-
NALSMAIN
SIG-
NALSDescription Remarks
ENG SPEED [rpm]×ו Indicates the engine speed computed from the
signals of the crankshaft position sensor (POS)
and camshaft position sensor (PHASE).• Accuracy becomes poor if engine
speed drops below the idle rpm.
• If the signal is interrupted while
the engine is running, an abnor-
mal value may be indicated.
MAS A/F SE-B1 [V]×ו The signal voltage of the mass air flow sensor
is displayed.• When the engine is stopped, a
certain value is indicated.
B/FUEL SCHDL
[msec]ו “Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.
A/F ALPHA-B1 [%]ו The mean value of the air-fuel ratio feedback
correction factor per cycle is indicated.• When the engine is stopped, a
certain value is indicated.
• This data also includes the data
for the air/fuel ratio learning con-
trol.
COOLAN TEMP/S
[°C] or [°F]×ו The engine coolant temperature (determined
by the signal voltage of the engine coolant tem-
perature sensor) is displayed.• When the engine coolant temper-
ature sensor is open or short-cir-
cuited, ECM enters fail-safe
mode. The engine coolant tem-
perature determined by the ECM
is displayed.
A/F SEN1 (B1) [V]×ו The A/F signal computed from the input signal
of the A/F sensor 1 is displayed.
HO2S2 (B1) [V]ו The signal voltage of the heated oxygen sensor
2 is displayed.
HO2S2 MNTR (B1)
[RICH/LEAN]ו Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
way catalyst is relatively small.
LEAN: means the amount of oxygen after three
way catalyst is relatively large.• When the engine is stopped, a
certain value is indicated.
VHCL SPEED SE
[km/h] or [mph]×ו The vehicle speed computed from the vehicle
speed signal is displayed.
BATTERY VOLT [V]×ו The power supply voltage of ECM is displayed.
ACCEL SEN 1 [V]××
• The accelerator pedal position sensor signal
voltage is displayed.• ACCEL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. ACCEL SEN 2 [V]×
THRTL SEN 1 [V]××
• The throttle position sensor signal voltage is
displayed.• THRTL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. THRTL SEN 2 [V]×

TROUBLE DIAGNOSIS
EC-117
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]×ו Indicates the engine speed computed
from the signal of the crankshaft position
sensor (POS) and camshaft position
sensor (PHASE).
MAS A/F SE-B1 [V]×ו The signal voltage of the mass air flow
sensor specification is displayed.• When engine is running specification
range is indicated.
B/FUEL SCHDL
[msec]ו “Base fuel schedule” indicates the fuel in-
jection pulse width programmed into
ECM, prior to any learned on board cor-
rection.• When engine is running specification
range is indicated.
A/F ALPHA-B1 [%]ו The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.• When engine is running specification
range is indicated.
• This data also includes the data for the
air-fuel ratio learning control.
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION• Engine: Return to the original
trouble condition
• Change the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING• Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Perform Idle Air Volume Learning.
POWER BAL-
ANCE• Engine: After warming up, idle the
engine.
• A/C switch OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Cut off each fuel injector signal
one at a time using CONSULT-II.Engine runs rough or dies.• Harness and connectors
• Compression
• Fuel injector
• Power transistor
•Spark plug
• Ignition coil
COOLING FAN*• Ignition switch: ON
• Turn the cooling fan “LOW”, “HI”
and “OFF” with CONSULT-II.Cooling fan moves and stops.• Harness and connectors
• Cooling fan relay
• Cooling fan motor
ENG COOLANT
TEMP• Engine: Return to the original
trouble condition
• Change the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL PUMP RE-
LAY• Ignition switch: ON
(Engine stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT-II and lis-
ten to operating sound.Fuel pump relay makes the operat-
ing sound.• Harness and connectors
• Fuel pump relay
PURG VOL
CONT/V• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.Engine speed changes according to
the opening percent.• Harness and connectors
• EVAP canister purge volume con-
trol solenoid valve

TROUBLE DIAGNOSIS
EC-123
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
INT/V SOL (B1)• Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 90%
AIR COND RLY• Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY• For 1 second after turning ignition switch ON
• Engine running or crankingON
• Except above conditions OFF
VENT CONT/V • Ignition switch: ON OFF
THRTL RELAY • Ignition switch: ON ON
COOLING FAN• Engine: After warming up, idle the
engine
• Air conditioner switch: OFFEngine coolant temperature: 97°C
(207°F) or lessOFF
Engine coolant temperature: Between
98°C (208°F) and 99°C (210°F)LOW
Engine coolant temperature: 100°C
(212°F) or moreHIGH
HO2S2 HTR (B1)• Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no loadON
• Engine speed: Above 3,600 rpm OFF
I/P PULLY SPD • Vehicle speed: More than 20 km/h (12 MPH)Almost the same speed as the
tachometer indication
VEHICLE SPEED• Turn drive wheels and compare CONSULT-II value with the speedometer
indication.Almost the same speed as the
speedometer indication
TRVL AFTER MIL • Ignition switch: ONVehicle has traveled after MIL has
turned ON.0 - 65,535 km
(0 - 40,723 mile)
A/F S1 HTR (B1)• Engine: After warming up, idle the engine
(More than 140 seconds after starting engine.)4 - 100%
AC PRESS SEN• Engine: Idle
• Air conditioner switch: ON (Compressor operates)1.0 - 4.0V
VHCL SPEED SE• Turn drive wheels and compare speedometer indication with the CONSULT-
II value.Almost the same speed as the
speedometer indication
SET VHCL SPD • Engine: Running ASCD: OperatingThe preset vehicle speed is
displayed.
MAIN SW • Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW • Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW • Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW • Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF MONITOR ITEM CONDITION SPECIFICATION

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-127
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000001702599
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-
tion)
• A/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)
• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionINFOID:0000000001702600
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm
2, 14.25 - 15.12 psi)
• Atmospheric temperature: 20 - 30°C (68 - 86°F)
• Engine coolant temperature: 75 - 95°C (167 - 203°F)
• Transmission: Warmed-up
- A/T and CVT models: After the engine is warmed up to normal operating temperature, drive vehicle until
“FLUID TEMP SE” (A/T or CVT) fluid temperature sensor signal) indicates more than 60°C (140°F).
- M/T models: After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
• Engine speed: Idle
Inspection ProcedureINFOID:0000000001702601
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-69, "
Basic Inspection".
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-
B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-127, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001702602
OVERALL SEQUENCE
SEF601Z