2009 NISSAN LATIO ECU

DTC P0455 EVAP CONTROL SYSTEM
EC-849
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
OK or NG OK >> GO TO 3.
NG >> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until reteaching sound is heard. 3.
CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG OK >> GO TO 5.
NG >> GO TO 4. 4.
CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC-529, " Component Inspection " .
OK or NG OK >> GO TO 5.
NG >> Replace fuel filler cap with a genuine one. 5.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or
disconnection.
Refer to EC-527 .
OK or NG OK >> GO TO 6.
NG >> Repair or reconnect the hose. 6.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 7. 7.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control is installed properly. Refer to EC-531, " Removal and Installation " .
• EVAP canister vent control valve.
Refer to EC-821, " Component Inspection " .
OK or NG OK >> GO TO 8.
NG >> Repair or replace EVAP canister vent control valve and O-ring. 8.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.
For the location of EVAP service port (2), refer to EC-527, " Description " .
• EVAP canister purge volume control solenoid valve (1)
• : Vehicle front
NOTE:
Improper installation of the EV AP service port adapter to the
EVAP service port may cause leaking. BBIA0703E

EC-854< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0456 EVAP CONTROL SYSTEM
DTC Confirmation Procedure INFOID:0000000004537346
NOTE:
• If DTC P0456 is displayed with P0442, firs t perform trouble diagnosis for DTC P0456.
• After repair, make sure that the hoses and clips are installed properly.
• If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
• Open engine hood before conducting following procedure.
• If any of following conditions are met just befo re the DTC confirmation procedure, leave the vehicle
for more than 1 hour.
- Fuel filler cap is removed.
- Refilled or drained the fuel.
- EVAP component parts is/are removed.
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Make sure the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4V
COOLAN TEMP/S: 0 - 32 °C (32 - 90 °F)
FUEL T/TMP SE: 0 - 35 °C (32 - 95 °F)
INT/A TEMP SE: More than 0 °C (32 °F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining
fuel until the output voltage condition of the “FUE L LEVEL SE” meets within the range above and leave
the vehicle for more than 1 hour. Then start from step 1).
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select “EVAP V/S LEAK P0456” of “EVAPORATI VE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT-III.
Follow the instruction displayed.
6. Make sure that “OK” is displayed.
If “NG” is displayed, refer to EC-855, " Diagnosis Procedure " .
NOTE:
• If the engine speed cannot be maintained with in the range displayed on CONSULT-III screen, go
to EC-566, " Basic Inspection " .
• Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid
valve properly.
Overall Function Check INFOID:0000000004537347
WITH GST
Use this procedure to check the overall function of the EV AP very small leak function. During this check, a 1st
trip DTC might not be confirmed.
CAUTION:
• Never use compressed air, doing so may damage the EVAP system.
• Do not start engine.
• Do not exceeded 4.12 kPa (0.042 kg/cm 2
, 0.6 psi).
1. Attach the EVAP service port adapter securely to the EVAP ser- vice port (2).
- EVAP canister purge volume control solenoid valve (1)
- : Vehicle front BBIA0703E

EC-856< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0456 EVAP CONTROL SYSTEM 5.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port (2), refer to EC-527, " Description " .
• EVAP canister purge volume control solenoid valve (1)
• : Vehicle front NOTE:
Improper installation of the EV AP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-III>>GO TO 6.
Without CONSULT-III>>GO TO 7. 6.
CHECK FOR EVAP LEAK
With CONSULT-III
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-III.
3. Touch “START” and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
CAUTION:
• Never use compressed air or a high pressure pump.
• Do not exceed 4.12 kPa (0.042 kg/cm 2
, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details.
Refer to EC-527, " Description " .
OK or NG OK >> GO TO 8.
NG >> Repair or replace. 7.
CHECK FOR EVAP LEAK
Without CONSULT-III
1. Turn ignition switch OFF. BBIA0703E
SEF916U
SEF200U

EC-860< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0460 FUEL LEVEL SENSOR
DTC P0460 FUEL LEVEL SENSOR
Component Description INFOID:0000000004537349
The fuel level sensor (3) is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
• Fuel level sensor unit and fuel pump (1)
• Fuel pressure regulator (2)
• Fuel tank temperature sensor (4)
On Board Diagn osis Logic INFOID:0000000004537350
NOTE:
• If DTC P0460 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-633 .
• If DTC P0460 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-635 .
• When the vehicle is parked, naturally the fuel level in the fuel tank is stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshi ng signal from the sensor, fuel level sensor malfunc-
tion is detected.
DTC Confirmation Procedure INFOID:0000000004537351
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
1. Start engine and wait maximum of 2 consecutive minutes.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-860, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045373521.
CHECK FUEL GAUGE OPERATION
Refer to DI-10, " Self-Diagnosis Mode of Combination Meter " .
OK or NG OK >> GO TO 2.
NG >> Follow the instruction of DI-10, " Self-Diagnosis Mode of Combination Meter " .
2.
CHECK FUEL LEVEL SENSOR AND CIRCUIT
Refer to DI-16, " Fuel Level Sensor Signal Inspection " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace malfunctioning parts. BBIA0704E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0460
0460 Fuel level sensor circuit
noise Even though the vehicle is parked, a signal be-
ing varied is sent from the fuel level sensor to
ECM. • Harness or connectors
(CAN communication line is open or
shorted)
• Harness or connectors
(Fuel level sensor circuit is open or short-
ed)
• Combination meter
• Fuel level sensor

.
• If DTC P0500 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-635 .
The vehicle speed signal is sent from “ABS actuator and electric unit (control unit)” or combination meter
through CAN communication line.
On Board Diagn osis Logic INFOID:0000000004537365
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode.
DTC Confirmation Procedure INFOID:0000000004537366
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels li fted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-III
1. Start engine.
2. Read “VHCL SPEED SE” in “DATA MONITOR” m ode with CONSULT-III. The vehicle speed on CON-
SULT-III should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to EC-867, " Diagnosis Procedure " .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC. DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0500
0500 Vehicle speed sensor The almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM even
when vehicle is being driven. • Harness or connectors
(CAN communication line is open or shorted.)
• Harness or connectors (Vehicle speed signal circuit is open or shorted)
• ABS actuator and electric unit (control unit)
• Combination meter Detected item Engine operating condition in fail-safe mode
Vehicle speed sensor When the fail-safe system for vehicle speed sensor is activated, the cooling fan operates
(High) while engine is running. ENG SPEED More th
an 1,600 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 5.5 - 31.8 msec
Shift lever Suitable position
PW/ST SIGNAL OFF

EC
NP
O
DTC P0850 PNP SWITCH
Component Description INFOID:0000000004537385
When the shift lever position is P or N (A/T, CVT), Neut ral (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004537386
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004537387
DTC Confirmation Procedure INFOID:0000000004537388
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode wit h CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
If NG, go to EC-882, " Diagnosis Procedure " .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to EC-882, " Diagnosis Procedure " .
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW • Ignition switch: ON Shift lever: P or N (A/T, CVT),
Neutral (M/T) ON
Shift lever: Except above OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850 Park/neutral position switch The signal of the park/neutral position (PNP)
switch is not changed in the process of en-
gine starting and driving. • Harness or connectors
[Park/neutral position (PNP) switch circuit
is open or shorted.]
• Park/neutral position (PNP) switch
• TCM (CVT models) Position (Shift lever) Known-good signal
N or P position (A/T, CVT)
Neutral position (M/T) ON
Except above OFF
ENG SPEED More than 1,100 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 3.5 - 31.8 msec
VHCL SPEED SE More than 64km/h (29 MPH)
Shift lever Suitable position

EC
NP
O
DTC P1572 ASCD BRAKE SWITCH
Component Description INFOID:0000000004537422
When the brake pedal is depressed, ASCD brake switch (2) is
turned OFF and stop lamp switch (1) is turned ON. ECM detects the
state of the brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-524 for the ASCD function.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004537423
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004537424
This self-diagnosis has the on e trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
• If DTC P1572 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-872 .
• This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when igniti on switch OFF. And even when ma lfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory. DTC No.
Trouble Diagnosis
Name DTC Detecting Condition Possible Cause
P1572
1572 ASCD brake switch A)
When the vehicle speed is above 30km/h (19
MPH), ON signals from the stop lamp switch
and the ASCD brake switch are sent to ECM
at the same time. • Harness or connectors
(Stop lamp switch circuit is shorted.)
• Harness or connectors (ASCD brake switch circuit is shorted.)
• Harness or connectors
(ASCD clutch switch circuit is shorted.)
(M/T)
• Stop lamp switch
• ASCD brake switch
• ASCD clutch switch (M/T)
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• Incorrect ASCD clutch switch installation (M/T)
• ECM
B)
ASCD brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving

Diagnosis Procedure " .
If 1st trip DTC is not detec ted, go to the following step.
6. Drive the vehicle for at least 5 consecutive seconds under the following condition.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-910, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III” above.