NISSAN LATIO 2009 Service Repair Manual

EC
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Item
DIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF DIAGNOSTIC
RESULT DATA
MONI-
TOR ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC* 1 FREEZE
FRAME
DATA* 2 SRT
STATUS DTC
WORK
SUP-
PORTENGINE 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 × × × ×
Vehicle speed signal × × ×
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 × ×
Power steering operation signal ×

Emission-related Diagnostic Information " .
*3: Always “COMPLT” is displayed.
WORK SUPPORT MODE
Work ItemENGINE CONTROL COMPONENT PARTS OUTPUT
Fuel injector × ×
Power transistor (Ignition timing) × ×
Throttle contro l motor relay × ×
Throttle control motor ×
EVAP canister purge volume con-
trol solenoid valve × × × ×
Air conditioner relay ×
Fuel pump relay × × ×
Cooling fan relay × × ×
Air fuel ratio (A/F) sensor 1 heater × ×
×*3
Heated oxygen sensor 2 heater × ×
×*3
EVAP canister vent control valve × × × ×
Intake valve timing control solenoid
valve × × ×
Calculated load value × ×
Item
DIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF DIAGNOSTIC
RESULT DATA
MONI- TOR ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC* 1 FREEZE
FRAME
DATA* 2 SRT
STATUS DTC
WORK SUP-
PORT WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE • FUEL PUMP WILL STOP BY TOUCHING “START” DUR- ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS. When releasing fuel pressure from
fuel line
IDLE AIR VOL LEARN • THE IDLE AIR VOLUME THAT KEEPS THE ENGINE WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM. When learning the idle air volume
SELF-LEARNING CONT • THE COEFFICI ENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT. When clearing the coefficient of
self-learning control value

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*: 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-542, " 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-
III WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-III MAY DIS-
PLAY “BATTERY VOLTAGE IS LOW. CHARGE BAT-
TERY”, 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 Wh en adjusting target ignition tim-
ing
VIN REGISTRATION • IN THIS MODE, VIN IS REGISTERED IN ECM. When registering VIN in ECM WORK ITEM CONDITION USAGE )
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 schedule.
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 th e moment a malfunction is detected is displayed.
B/FUEL SCHDL [msec] • The ba se fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE
[ ° C] or [ °F] • The intake air temperature at the moment a malfunction is detected is displayed.

Monitored item [Unit] Description Remarks
ENG SPEED
[rpm] • Indicates the engine speed computed from the signals of the
crankshaft position sensor (POS) and camshaft position sen-
sor (PHASE). • Accuracy becomes poor if engine speed
drops below the idle rpm.
• If the signal is interrupted while the engine is running, an abnormal value may be indicat-
ed.
MAS A/F SE-B1
[V] • The signal voltage of the mass air flow sensor is displayed. • When the engine is stopped, a certain value
is indicated.
• When engine is running, specification range is indicated in "SPEC".
B/FUEL SCHDL
[msec] • “Base fuel schedule” indicates the fuel injection pulse width
programmed into ECM, prior to any learned on board correc-
tion. • When engine is running, specification range
is indicated in "SPEC".
A/F ALPHA-B1
[%] • The mean value of the air-fuel ratio feedback correction fac-
tor 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 control.
• When engine is running, specification range
is indicated in "SPEC".
COOLAN TEMP/S
[ ° C] or [ °F] • The engine coolant temperature (determined by the signal
voltage of the engine coolant temperature sensor) is dis-
played. • When the engine coolant temperature sen-
sor is open or short-circuited, ECM enters
fail-safe mode. The engine coolant temper-
ature determined by the ECM is displayed.
A/F SEN1 (B1)
[V] • The A/F signal computed from the input signal of the A/F sen-
sor 1 is displayed.
HO2S2 (B1)
[V] • The signal voltage of the heated oxygen sensor 2 is dis-
played.
HO2S2 MNTR (B1)
[RICH/LEAN] • 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] • The vehicle speed computed from the vehicle speed signal is
displayed.
BATTERY VOLT
[V] • The power supply voltage of ECM is displayed.
ACCEL SEN 1
[V] • The accelerator pedal position sensor signal voltage is dis-
played. • ACCEL SEN 2 signal is converted by ECM
internally. Thus, it differs from ECM terminal
voltage signal.
ACCEL SEN 2
[V]
TP SEN 1-B1
[V] • The throttle position sensor signal voltage is displayed. • TP SEN 2-B1 signal is converted by ECM in-
ternally. Thus, it differs from ECM terminal
voltage signal.
TP SEN 2-B1
[V]

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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 JUDGEMENT 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.

EC-612< SERVICE INFOMATION >
[MR TYPE 1]
TROUBLE DIAGNOSIS
*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer to EC-542, " Emission-related Diagnostic Information " .
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
DTC WORK SUPPORT Mode
*: DTC P1442 and P1456 does not apply to C11 models but appears in DTC Work Support Mode screens.
Generic Scan Tool (GST) Function INFOID:0000000004537061
DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
8 different functions explained below.
ISO 15765-4 is used as the protocol.
The name GST or Generic Scan Tool is used in this service manual.
FUNCTION VENT CON-
TROL/V • Ignition switch: ON
(Engine stopped)
• Turn solenoid valve “ON” and “OFF” with the CONSULT-III and
listen to operating sound. Solenoid valve makes an operating
sound. • Harness and connectors
• EVAP canister vent control valve
V/T ASSIGN AN-
GLE • Engine: Return to the original
trouble condition
• Change intake valve timing using CONSULT-III. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Intake valve timing control sole-
noid valve
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY) Test mode Test item Corresponding DTC No. Reference page
EVAPORATIVE SYS-
TEM PURG FLOW P0441 P0441
EC-792EVP SML LEAK P0442/P1442*
P0442
EC-797 P0455
EC-847 EVP V/S LEAK P0456/P1456* P0456
EC-853PURG VOL CN/V P1444 P0443
EC-804A/F SEN1
A/F SEN1 (B1) P1276 P0130
EC-692A/F SEN1 (B1) P1278/P1279 P0133
EC-710HO2S2
HO2S2 (B1) P0139 P0139
EC-733HO2S2 (B1) P1146 P0138
EC-724HO2S2 (B1) P1147 P0137
EC-717 SEF139P

TROUBLE DIAGNOSIS
EC-613
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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G H
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K L
M A EC
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INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect GST to data link connector (1), which is located under LH dash panel.
3. Turn ignition switch ON.
4. Enter the program according to instruction on the screen or in the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.) Diagnostic test mode Function
Service $01 READINESS TESTS This diagnostic service gains access to current emission-related data values, including an-
alog inputs and outputs, digital inputs and outputs, and system status information.
Service $02 (FREEZE DATA) This diagnostic service gains access to emission-related data value which were stored by
ECM during the freeze frame. For details, refer to EC-604, " CONSULT-III Function (EN-
GINE) " .
Service $03 DTCs This diagnostic service gains access to emission-related power train trouble codes which
were stored by ECM.
Service $04 CLEAR DIAG INFO This diagnostic service can clear all emission-related diagnostic information. This in-
cludes:
• Clear number of diagnostic trouble codes (Service $01)
• Clear diagnostic trouble codes (Service $03)
• Clear trouble code for freeze frame data (Service $01)
• Clear freeze frame data (Service $02)
• Reset status of system monitoring test (Service $01)
• Clear on board monitoring test results (Service $06 and $07)
Service $06 (ON BOARD TESTS) This diagnostic service accesses the results of on board diagnostic monitoring tests of
specific components/systems that are not continuously monitored.
Service $07 (ON BOARD TESTS) This diagnostic service enables the off board test drive to obtain test results for emission-
related powertrain components/systems that are continuously monitored during normal
driving conditions.
Service $08 — This diagnostic service can close EVAP system in ignition switch ON position (Engine
stopped). When this diagnostic service is performed, EVAP canister vent control valve can
be closed. In the following conditions, this diagnostic service cannot function.
• Low ambient temperature
• Low battery voltage
• Engine running
• Ignition switch OFF
• Low fuel temperature
• Too much pressure is applied to EVAP system
Service $09 (CALIBRATION ID) This diagnostic service enables the off-board test device to request specific vehicle infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs. BBIA0734E
SEF398S

.
B/FUEL SCHDL See EC-618 .
A/F ALPHA-B1 See EC-618 .
COOLAN TEMP/S • Engine: After warming up More than 70 °C (158 °F)
A/F SEN1 (B1) • Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2V
HO2S2 (B1) • Revving engine from idle to 3,000 rpm quickly 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 0 - 0.3V
←→ Approx. 0.6 -
1.0V
HO2S2 MNTR (B1) LEAN ←→ RICH
VHCL SPEED SE • Turn drive wheels and compare CONSULT-III value with the speedometer
indication. Almost the same speed as the
speedometer indication.
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14V
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 4.0 - 4.8V
ACCEL SEN 2* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 3.9 - 4.8V
EVAP SYS PRES • Ignition switch: ON Approx. 1.8 - 4.8V
TP SEN 1-B1
TP SEN 2-B1* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released More than 0.36V
• Shift lever: D (A/T, CVT), 1st (M/T) Accelerator pedal: Fully depressed Less than 4.75V
START SIGNAL • Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS • Ignition switch: ON Accelerator
pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG • Engine: After warming up, idle the
engine Air conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.) ON