2009 NISSAN LATIO hood open

DTC P0420 THREE WAY CATALYST FUNCTION
EC-787
< SERVICE INFOMATION >
[MR TYPE 1] C
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DTC P0420 THREE WAY CATALYST FUNCTION
On Board Diagnosis Logic INFOID:0000000004537280
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decr eases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated
oxygen sensor 2 approaches a specified limit value, the three way
catalyst (manifold) malfunction is diagnosed.
DTC Confirmation Procedure INFOID:0000000004537281
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
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70 °C (158 °F).
If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches to 70°C (158 °F).
7. Open engine hood.
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUPPORT” mode with CONSULT-III.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator pedal completely.
If “INCMP” of “CATALYST” changed to “CMPLT”, go to step 12.
10. Wait 5 seconds at idle.
11. Rev engine up to 2,000 to 3,000 rpm and maintain it unt il “INCMP” of “CATALYST” changes to “CMPLT” (It
will take approximately 5 minutes).
If not “CMPLT”, stop engine and cool it down to less than 70 °C (158 °F) and then retest from step 1.
12. Check 1st trip DTC. If 1st trip DTC is detected, go to EC-788, " Diagnosis Procedure " .
Overall Function Check INFOID:0000000004537282
Use this procedure to check the overall function of the th ree way catalyst (manifold). During this check, a 1st
trip DTC might not be confirmed. SEF484YB
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420 Catalyst system efficiency
below threshold • Three way catalyst (manifold) does not operate
properly.
• Three way catalyst (manifold) does not have enough oxygen storage capacity. • Three way catalyst (manifold)
• Exhaust tube
• Intake air leaks
• Fuel injector
• Fuel injector leaks
• Spark plug
• Improper ignition timing

EC-788< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0420 THREE WAY CATALYST FUNCTION
WITH GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Open engine hood.
6. Set voltmeter probe between ECM terminals 50 (HO2S2 signal) and ground.
7. Keep engine speed at 2,500 rpm constant under no load.
8. Make sure that the voltage does not vary for more than 5 sec- onds.
If the voltage fluctuation cycle takes less than 5 seconds, go to
EC-788, " Diagnosis Procedure " .
• 1 cycle: 0.6 - 1.0 → 0 - 0.3 → 0.6 - 1.0
Diagnosis Procedure INFOID:00000000045372831.
CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
OK or NG OK >> GO TO 2.
NG >> Repair or replace. 2.
CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst (manifold).
OK or NG OK >> GO TO 3.
NG >> Repair or replace. 3.
CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG OK >> GO TO 4.
NG >> Repair or replace. 4.
CHECK IGNITION TIMING
Check the following items. Refer to EC-566, " Basic Inspection " . PBIB2996E
PBIB1216E

EC-798< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0442 EVAP CONTROL SYSTEM
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:
• Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed
on flat level surface.
• Always perform test at a temperature of 0 to 30 °C (32 to 86 °F).
• Open engine hood before conducting following procedure.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
4. Check the following conditions are met.
COOLAN TEMP/S: 0 - 70 °C (32 - 158 °F)
INT/A TEMP SE: 0 - 30 °C (32 - 86 °F)
5. Select “EVAP SML LEAK P0442/P1442” of “EV APORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within t he range displayed on the CONSULT-III screen, go to
EC-566, " Basic Inspection " .
6. Make sure that “OK” is displayed. If “NG” is displayed, refer to EC-798, " Diagnosis Procedure " .
NOTE:
Make sure that EVAP hoses are connected to th e EVAP canister purge volume control solenoid
valve properly.
WITH GST
NOTE:
Be sure to read the explanation of Driving Pattern on EC-542, " Emission-related Diagnostic Information "
before driving vehicle.
1. Start engine.
2. Drive vehicle according to Driving Pattern, EC-542, " Emission-related Diagnostic Information " .
3. Stop vehicle.
4. Turn ignition switch OFF and wait at leas t 10 seconds and then turn ignition switch ON.
5. Select Service $07 with GST.
- If P0442 is displayed on the screen, go to EC-798, " Diagnosis Procedure " .
- If P0441 is displayed on the screen, go to EC-793, " Diagnosis Procedure " for DTC P0441.
Diagnosis Procedure INFOID:00000000045372911.
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 proper ly 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. SEF915U

EC-848< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0455 EVAP CONTROL SYSTEM
• Make sure that EVAP hose are connected to EVAP canister purge volume control solenoid valve
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:
• Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed
on flat level surface.
• Open engine hood before conducting the following procedure.
WITH CONSULT-III
1. Tighten fuel filler cap securely until reteaching sound is heard.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
5. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70 °C (32 - 158 °F)
INT/A TEMP SE: 0 - 60 °C (32 - 140 °F)
6. Select “EVAP SML LEAK P0442/P1442” of “EV APORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within t he range displayed on the CONSULT-III screen, go to
EC-566, " Basic Inspection " .
7. Make sure that “OK” is displayed.
If “NG” is displayed, select “SELF-DIAG RESULT S” mode with CONSULT-III and make sure that “EVAP
GROSS LEAK [P0455]” is displayed. If it is displayed, refer to EC-848, " Diagnosis Procedure " .
If P0442 is displayed, perform Diagnostic Procedure for DTC P0442, EC-798, " Diagnosis Procedure " .
WITH GST
NOTE:
Be sure to read the explanation of Driving Pattern on EC-542, " Emission-related Diagnostic Information "
before driving vehicle.
1. Start engine.
2. Drive vehicle according to Driving Pattern, EC-542, " Emission-related Diagnostic Information " .
3. Stop vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ignition switch ON.
5. Select Service $07 with GST.
• If P0441 is displayed on the screen, go to EC-793, " Diagnosis Procedure " for DTC P0441.
• If P0442 is displayed on the screen, go to EC-798, " Diagnosis Procedure " for DTC P0442.
• If P0455 is displayed on the screen, go to EC-848, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045373441.
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 proper ly by rotating the cap clockwise. SEF915U

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

Idle Air Volume Learning " ,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-1012 .
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10 °C (14 °F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-868, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004537372OK >> GO TO 2.
NG >> Discover air leak location and repair. ECM Re-communicating Function " .
4. Perform EC-572, " VIN Registration " .
5. Perform EC-572, " Accelerator Pedal Released Position Learning " .
6. Perform EC-572, " Throttle Valve Closed Position Learning " .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0506
0506 Idle speed control sys-
tem RPM lower than ex-
pected The idle speed is less than the target idle speed
by 100 rpm or more. • Electric throttle control actuator
• Intake air leak

Idle Air Volume Learning " ,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-1012 .
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10 °C (14 °F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-870, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004537376OK >> GO TO 2.
NG >> Repair or replace. OK >> GO TO 3.
NG >> Discover air leak location and repair.

EC-1078< SERVICE INFOMATION >
[MR TYPE 2]
BASIC SERVICE PROCEDURE
BASIC SERVICE PROCEDURE
Basic Inspection INFOID:00000000044999291.
INSPECTION START
1. Check service records for any recent repairs that ma y indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
- Harness connectors for improper connections
- Wiring harness for improper connections, pinches and cut
- Vacuum hoses for splits, kinks and improper connections
- Hoses and ducts for leaks
- Air cleaner clogging
- Gasket
3. Confirm that electrical or mechanical loads are not applied.
- Headlamp switch is OFF.
- Air conditioner switch is OFF.
- Rear window defogger switch is OFF.
- Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no load.
6. Make sure that no DTC is displayed with CONSULT-III or GST.
OK or NG OK >> GO TO 3.
NG >> GO TO 2. 2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3. 3.
CHECK TARGET IDLE SPEED
With CONSULT-III
1. Run engine at about 2,000 rpm for about 2 minutes under no load. SEF983U
SEF976U
SEF977U