2009 NISSAN LATIO light

BASIC SERVICE PROCEDURE
EC-1083
< SERVICE INFOMATION >
[MR TYPE 2] C
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• : Vehicle front
2. Connect No. 4 ignition coil (1) and No. 4 spark plug with suitable high-tension wire (A) as shown, and attach timing light clamp (B) to this wire.
• : Vehicle front
3. Check ignition timing. • Timing indicator (1)
Procedure After Replacing ECM INFOID:0000000004499931
When replacing ECM, the following procedure must be performed.
1. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs.
Refer to BL-249, " ECM Re-communicating Function " .
2. Perform EC-1084, " VIN Registration " .
3. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
4. Perform EC-1084, " Throttle Valve Closed Position Learning " . PBIB3321E
PBIB3322E
PBIB3334E
PBIB3263E

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[Air conditioner, headlamp, rear window defogger]
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- Models with CONSULT-III (A/T and CVT models)
• Drive vehicle until “FLUID TEMP SE” in “DATA MONI TOR” mode of “A/T” or “CVT” system indicates less
than 0.9V.
- Models without CONSULT-III (A/T and CVT models) and M/T models
• Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-III
1. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
2. Perform EC-1084, " Throttle Valve Closed Position Learning " .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREP ARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEA RN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Vol-
ume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to
the DIAGNOSTIC PROCEDURE below.
8. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.
Refer to EC-1078, " Basic Inspection " .
Without CONSULT-III
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the di agnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
2. Perform EC-1084, " Throttle Valve Closed Position Learning " .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREP ARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully releas ed, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quick ly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.

BASIC SERVICE PROCEDURE
EC-1087
< SERVICE INFOMATION >
[MR TYPE 2] C
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1. Remove fuel pump fuse (1) located in IPDM E/R (2).
• : Vehicle front
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel pressure.
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK CAUTION:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
• Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because C11 models do not have fuel return system.
• The fuel hose connection method u sed when taking fuel pressure check must not be used for other
purposes.
• Be careful not to scratch or put debris around connection area when servicing, so that the quick
connector maintains seal abil ity with O-rings inside.
• Do not perform fuel pressure check with electrical syst ems operating (i.e. lights, rear defogger, A/C,
etc.) Fuel pressure gauge may indicate false readin gs due to varying engine load and changes in
manifold vacuum.
1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".
2. Prepare fuel hose for fuel pressure check B and fuel tube adapter (KV10118400) D, then connect fuel pressure gauge A.
• : To quick connector
• : To fuel tube (engine side)
• C: Clamp
• Use suitable fuel hose for fuel pressure check (genuine
NISSAN fuel hose without quick connector).
• To avoid unnecessary force or tension to hose, use moder- ately long fuel hose for fuel pressure check.
• Do not use the fuel hose for checking fuel pressure with dam- age or cracks on it.
• Use Pressure Gauge to check fuel pressure.
3. Remove fuel hose. Refer to EM-156, " Removal and Installation " .
• Do not twist or kink fuel hose because it is plastic hose.
4. Connect fuel hose for fuel pressure check (1) to fuel tube (engine side) with clamp (2) as shown in the figure.
• No.2 spool (5)
• Wipe off oil or dirt from hose insertion part using cloth moist-
ened with gasoline.
• Apply proper amount of gasoline between top of the fuel tube (3) and No.1 spool (4).
• Insert fuel hose for fuel pressure check until it touches the No.1 spool on fuel tube.
• Use NISSAN genuine hose clamp (part number: 16439 N4710
or 16439 40U00).
• When reconnecting fuel line, always use new clamps.
• Use a torque driver to tighten clamps.
• Install hose clamp to the positi on within 1 - 2 mm (0.04 - 0.08 in).
• Make sure that clamp screw does not contact adjacent parts. PBIB2958E
Tightening torque: 1 - 1.5 N·m
(0.1 - 0.15 kg-m, 9 - 13 in-lb) PBIB2982E
PBIB2983E

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• When there is an open circuit on MIL circuit, the ECM c
annot warn the driver by lighting up MIL when there
is malfunction on engine control system.
Therefore, when electrical controlled throttle and pa rt of ECM related diagnoses are continuously detected
as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnos es except MIL circuit are detected and demands the
driver to repair the malfunction.
Symptom Matrix Chart INFOID:0000000004499940
SYSTEM — BASIC ENGINE CONTROL SYSTEM P0117
P0118 Engine coolant temperature
sensor circuit Engine coolant temperature will be determined by ECM based on the following condi-
tion.
CONSULT-III displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START 40
°C (104 °F)
Approx. 4 minutes or more after
engine sarting. 80
°C (176 °F)
Except as shown above 40 - 80
°C (104 - 176 °F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cool-
ing fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2100
P2103 Throttle control relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control func- tion ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control actu- ator (When electric throttle control actuator does not function properly due to the return
spring malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control ac tuator by regulating the throttle opening to
20 degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P (A/T, CVT), Neutral (M/T) position, and engine speed
will not exceed 1,000 rpm or more.
P2122
P2123
P2127
P2128
P2138 Accelerator pedal position
sensor The ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
DTC No. Detected items Engine operating condition in fail-safe mode
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

EC-1110< SERVICE INFOMATION >
[MR TYPE 2]
TROUBLE DIAGNOSIS
4 P Throttle contro l motor (Close)[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released Approximately 1.8V
5 G Heated oxygen sensor 2
heater [Engine is running]
• Engine speed: 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 load. Approximately 10V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm. BATTERY VOLTAGE
(11 - 14V)
9 P EVAP canister purge volume
control solenoid valve [Engine is running]
• Idle speed
• Accelerator pedal: Not depressed even slightly, after engine starting. BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Engine speed: About 2,000 rpm (More than 100 seconds after starting engine) Approximately 10V
10 11 B
B ECM ground
[Engine is running]
• Idle speed Body ground
13 L Tachometer signal [Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle. 3 - 5V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm. 3 - 5V
TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage) PBIA8149J
PBIA8148J
PBIB0050E
PBIB0520E
PBIA8164J
PBIA8165J

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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) 94 R ASCD steering switch
[Ignition switch: ON]
• ASCD steering switch: OFF Approximately 4V
[Ignition switch: ON]
• MAIN switch: Pressed Approximately 0V
[Ignition switch: ON]
• CANCEL switch: Pressed Approximately 1V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: Pressed Approximately 3V
[Ignition switch: ON]
• SET/COAST switch: Pressed Approximately 2V
95 B Sensor ground
(ASCD steering switch) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
99 R Stop lamp switch [Ignition switch: OFF]
• Brake pedal: Fully released Approximately 0V
[Ignition switch: OFF]
• Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14V)
100 G ASCD brake switch [Ignition switch: ON]
• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal: Slightly de-
pressed (M/T) Approximately 0V
[Ignition switch: ON]
• Brake pedal: Fully released (A/T, CVT)
• Brake pedal and clutch pedal: Fully re-
leased (M/T) BATTTERY VOLTAGE
(11 - 14V)
102 SB Sensor power supply
(Accelerator pedal position
sensor 2) [Ignition switch: ON]
Approximately 5V
103 GR Accelerator pedal position
sensor 2 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.3 - 0.6V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 1.95 - 2.4V
104 Y Sensor ground
(Accelerator pedal position
sensor 2) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
105 G Power supply for ECM [Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
106 P Sensor power supply
(Accelerator pedal position
sensor 1) [Ignition switch: ON]
Approximately 5V
108 B ECM ground [Engine is running]
• Idle speed Body ground
110 G Accelerator pedal position
sensor 1 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.6 - 0.9V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 3.9 - 4.7V
111 R Sensor ground
(Accelerator pedal position
sensor 1) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)

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FUEL T/TMP SE
[ ° C] or [ °F] • The fuel temperature (determined by the signal voltage of the
fuel tank temperature sensor) is displayed.
INT/A TEMP SE
[ ° C] or [ °F] • The intake air temperature (determined by the signal voltage
of the intake air temperature sensor) is indicated.
EVAP SYS PRES
[V] • The signal voltage of EVAP control system pressure sensor
is displayed.
FUEL LEVEL SE
[V] • The signal voltage of the fuel level sensor is displayed.
START SIGNAL
[ON/OFF] • Indicates start signal status [ON/OFF] computed by the ECM
according to the signals of engine speed and battery voltage. • After starting the engine, [OFF] is displayed
regardless of the starter signal.
CLSD THL POS
[ON/OFF] • Indicates idle position [ON/OFF] computed by the ECM ac-
cording to the accelerator pedal position sensor signal.
AIR COND SIG
[ON/OFF] • Indicates [ON/OFF] condition of the air conditioner switch as
determined by the air conditioner signal.
P/N POSI SW
[ON/OFF] • Indicates [ON/OFF] condition from the park/neutral position
(PNP) switch signal.
PW/ST SIGNAL
[ON/OFF] • [ON/OFF] condition of the power steering system (deter-
mined by the signal sent from EPS control unit) is indicated.
LOAD SIGNAL
[ON/OFF] • Indicates [ON/OFF] condition from the electrical load signal.
ON: Rear window defogger switch is ON and/or lighting
switch is in 2nd position.
OFF: Both rear window defogger switch and lighting switch
are OFF.
IGNITION SW
[ON/OFF] • Indicates [ON/OFF] condition from ignition switch.
HEATER FAN SW
[ON/OFF] • Indicates [ON/OFF] condition from the heater fan switch sig-
nal.
BRAKE SW
[ON/OFF] • Indicates [ON/OFF] condition from the stop lamp switch sig-
nal.
INJ PULSE-B1
[msec] • Indicates the actual fuel injection pulse width compensated
by ECM according to the input signals. • When the engine is stopped, a certain com-
puted value is indicated.
IGN TIMING
[BTDC] • Indicates the ignition timing computed by ECM according to
the input signals. • When the engine is stopped, a certain value
is indicated.
CAL/LD VALUE
[%] • “Calculated load value” indicates the value of the current air-
flow divided by peak airflow.
MASS AIRFLOW
[g·m/s] • Indicates the mass airflow computed by ECM according to
the signal voltage of the mass air flow sensor.
PURG VOL C/V
[%] • Indicates the EVAP canister purge volume control solenoid
valve control value computed by the ECM according to the in-
put signals.
• The opening becomes larger as the value increases.
INT/V TIM (B1)
[ ° CA] • Indicates [
°CA] of intake camshaft advanced angle.
INT/V SOL (B1)
[%] • The control value of the intake valve timing control solenoid
valve (determined by ECM according to the input signal) is in-
dicated.
• The advance angle becomes larger as the value increases
AIR COND RLY
[ON/OFF] • The air conditioner relay control condition (determined by
ECM according to the input signals) is indicated.
FUEL PUMP RLY
[ON/OFF] • Indicates the fuel pump relay control condition determined by
ECM according to the input signals.
Monitored item [Unit] Description Remarks

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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item AT OD CANCEL
[ON/OFF] • Indicates [ON/OFF] condition of A/T O/D cancel signal sent
from the TCM. • For M/T models always “OFF” is displayed
CRUISE LAMP
[ON/OFF] • Indicates [ON/OFF]
condition of CRUISE lamp determined
by the ECM according to the input signals.
SET LAMP
[ON/OFF] • Indicates [ON/OFF] condition of SET lamp determined by the
ECM according to the input signals.
A/F ADJ-B1 • Indicates the correction factor stored in ECM. The factor is
calculated from the difference between the target air/fuel ratio
stored in ECM and the air/fuel ratio calculated from air fuel ra-
tio (A/F) sensor 1 signal.
Monitored item [Unit] Description Remarks TEST ITEM CONDITION JUDGMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION • Engine: Return to the original
trouble condition
• Change the amount of fuel injec- tion using CONSULT-III. 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-III. 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-III. 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-III. 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-III. 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-III 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-III. Engine speed changes according to
the opening percent. • Harness and connectors
• EVAP canister purge volume con- trol solenoid valve
FUEL/T TEMP
SEN • Change the fuel tank temperature using CONSULT-III.