NISSAN LATIO 2009 Service Repair Manual

DTC P0456 EVAP CONTROL SYSTEM
EC-855
< SERVICE INFOMATION >
[MR TYPE 1] C
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2. Set the pressure pump and a hose.
3. Also set the pressure pump with pressure gauge to the EVAP service port adapter.
4. Turn ignition switch ON.
5. Connect GST and select Service $08.
6. Using Service $08 control the EVAP canister vent control valve
(close).
7. Apply pressure and make sure the following conditions are sat- isfied.
Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg)
Time to be waited after the pressure drawn in to the EVAP
system and the pressure to be dropped: 60 seconds and
the pressure should not be dropped more than 0.4 kPa (3 mmHg, 0.12 inHg).
If NG, go to EC-855, " Diagnosis Procedure " .
If OK, go to next step.
8. Disconnect GST.
9. Start engine and warm it up to normal operating temperature.
10. Turn ignition switch OFF and wait at least 10 seconds.
11. Restart engine and let it idle for 90 seconds.
12. Keep engine speed at 2,000 rpm for 30 seconds.
13. Turn ignition switch OFF. NOTE:
For more information, refe r to GST Instruction Manual.
Diagnosis Procedure INFOID:00000000045373481.
CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
OK or NG OK >> GO TO 2.
NG >> Replace with genuine NISSAN fuel filler cap. 2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
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. SEF462UI
SEF915U

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

DTC P0456 EVAP CONTROL SYSTEM
EC-857
< SERVICE INFOMATION >
[MR TYPE 1] C
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2. Apply 12 volts DC to EVAP canister vent control valve (3). The
valve will close. (Continue to apply 12 volts until the end of test.)
- EVAP control system pressure sensor (1)
- EVAP canister (2)
3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and EVAP service port adapter.
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. 8.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control valve 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 9.
NG >> Repair or replace EVAP canister vent control valve and O-ring. 9.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent c ontrol valve and EVAP control system pressure sensor
attached.
2. Does water drain from the EVAP canister?
Yes or No Yes >> GO TO 10.
No (With CONSULT-III)>>GO TO 12.
No (Without CONSULT-III)>>GO TO 13. 10.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EV AP canister vent control valve and EVAP control system pressure sensor
attached. BBIA0693E
SEF200U
PBIB1213E

OK (With CONSULT-III)>>GO TO 12.
OK (Without CONSULT-III)>>GO TO 13.
NG >> GO TO 11. OK >> GO TO 15.
NG >> GO TO 14. OK >> GO TO 16.
NG >> GO TO 14. Vacuum Hose Drawing " .
OK or NG OK >> GO TO 15.
NG >> Repair or reconnect the hose. Component Inspection " .
OK or NG OK >> GO TO 16.
NG >> Replace EVAP canister purge volume control solenoid valve. Component Inspection " .
OK or NG OK >> GO TO 17.
NG >> Replace fuel level sensor unit. Vacuum should exist.
Vacuum should exist.

EC
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OK or NG OK >> GO TO 18.
NG >> Replace EVAP control system pressure sensor. Description " .
OK or NG OK >> GO TO 19.
NG >> Repair or reconnect the hose. .
OK or NG OK >> GO TO 21.
NG >> Repair or replace hoses and tubes. OK >> GO TO 22.
NG >> Repair or replace hose, tube or filler neck tube. Component Inspection " .
OK or NG OK >> GO TO 23.
NG >> Replace refueling EVAP vapor cut valve with fuel tank. .
OK or NG OK >> GO TO 24.
NG >> Replace fuel level sensor unit. .
>> INSPECTION END

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

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>> INSPECTION END
Removal and Installation INFOID:0000000004537353
FUEL LEVEL SENSOR Refer to FL-5 .

EC-862< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0461 FUEL LEVEL SENSOR
DTC P0461 FUEL LEVEL SENSOR
Component Description INFOID:0000000004537354
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:0000000004537355
NOTE:
• If DTC P0461 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-633 .
• If DTC P0461 is displayed with DT C U1010, first perform the trouble diagnosis for DTC U1010. Refer
to EC-635 .
• This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.Driving long distances naturally affect fuel gauge level.
Overall Function Check INFOID:0000000004537356
Use this procedure to check the overall function of the f uel level sensor function. During this check, a 1st trip
DTC might not be confirmed.
WARNING:
When performing following procedure, be sure to observe the handling of the fuel.
Refer to FL-4 .
TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.
WITH CONSULT-III
NOTE:
Start from step 10, if it is possibl e to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line, refer to EC-574, " Fuel Pressure Check " .
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
6. Select “FUEL LEVEL SE” in “DAT A MONITOR” mode with CONSULT-III.
7. Check “FUEL LEVEL SE” output voltage and note it.
8. Select “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-III.
9. Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
10. Check “FUEL LEVEL SE” output voltage and note it. BBIA0704E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0461
0461 Fuel level sensor circuit
range/performance The output signal of the fuel level sensor does
not change within the specified range even
though the vehicle has been driven a long dis-
tance. • 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

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11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12. If NG, go to EC-863, " Diagnosis Procedure " .
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line, refer to EC-574, " Fuel Pressure Check " .
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies.
10. If NG, go to EC-863, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004537357Self-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 " .
Fuel Level Sensor Signal Inspection " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace malfunctioning parts. .
>> INSPECTION END
Removal and Installation INFOID:0000000004537358
FUEL LEVEL SENSOR Refer to FL-5 .

EC-864< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0462, P0463
FUEL LEVEL SENSOR
DTC P0462, P0463 FUEL LEVEL SENSOR
Component Description INFOID:0000000004537359
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:0000000004537360
NOTE:
• If DTC P0462 or P0463 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for
DTC U1000, U1001. Refer to EC-633 .
• If DTC P0462 or P0463 is displayed with DTC U1010, first perform the trouble diagnosis for DTC
U1010. Refer to EC-635 .
DTC Confirmation Procedure INFOID:0000000004537361
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:
Before performing the following procedure, confirm that battery voltage is more than 11V at ignition
switch ON.
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-864, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045373621.
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
P0462
0462 Fuel level sensor circuit
low input An excessively low voltage from the sensor is
sent 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
P0463
0463 Fuel level sensor circuit
high input An excessively high voltage from the sensor is
sent to ECM.