2009 NISSAN LATIO check engine

P0420 THREE WAY CATALYST FUNCTION
EC-275
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
Diagnosis Procedure
INFOID:00000000047801681.
CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
Is the inspection result normal? YES >> GO TO 2.
NO >> 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).
Is exhaust gas leak detected? YES >> Repair or replace.
NO >> GO TO 3. 3.
CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected? YES >> Repair or replace.
NO >> GO TO 4. 4.
CHECK IDLE SPEED AND IGNITION TIMING
For procedure, refer to EC-30, " IGNITION TIMING : Special Repair Requirement " .
For specification, refer to EC-504, " Idle Speed " and
EC-504, " Ignition Timing " .
Is the inspection result normal? YES >> GO TO 5.
NO >> Follow the instruction of EC-26, " BASIC INSPECTION : Special Repair Requirement " .
5.
CHECK FUEL INJECTOR
1. Stop engine and then turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground.
Is the inspection result normal? YES >> GO TO 6.
NO >> Perform EC-431, " Diagnosis Procedure " .
6.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION: PBIB1216E
ECM
Ground Voltage
Connector Terminal
F10 25
Ground Battery voltage
29
30
31 JMBIA2201GB

EC-276< COMPONENT DIAGNOSIS >
[HR16DE]
P0420 THREE WAY CATALYST FUNCTION
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoi d the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
CAUTION:
• During the operation, always stay 0.5 m (19.7 in) away from the spark plug and the ig nition coil. Be careful not to
get an electrical shock wh ile checking, because the elec-
trical discharge voltage becomes 20 kV or more.
• It might cause to damage the igni tion coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the sp ark might be generated even if the coil is mal-
functioning.
Is the inspection result normal? YES >> GO TO 10.
NO >> GO TO 7. 7.
CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.
Is the inspection result normal? YES >> GO TO 8.
NO >> Check ignition coil, power transistor and their circuits. Refer to EC-441, " Diagnosis Procedure " .
8.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal? YES >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-117, " Spark Plug " .
NO >> Repair or clean spark plug. Then GO TO 9. 9.
CHECK FUNCTION OF IGNITION COIL-III Spark should be generated. JMBIA0066GB
Spark should be generated.
SEF156I

EC
NP
O
1. Reconnect the initial spark plugs.
2. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-117, " Spark
Plug " .
Removal and Installation " .
2. Remove fuel injector assembly. Keep fuel hose and all fuel injectors connected to fuel tube.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
Does fuel drip from fuel injector? YES >> GO TO 11.
NO >> Replace the fuel injector(s) from which fuel is dripping. Diagnosis Procedure " .
Is the inspection result normal? YES >> Replace three way catalyst assembly.
NO >> Repair or replace harness or connector Spark should be generated.

YES >> INSPECTION END
NO >> Go to EC-280, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004780171YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO >> Replace EVAP canister. System
Description " .
2. Start engine and let it idle.
3. Select “PURG VOL CONT/V” in “A CTIVE TEST” mode with CONSULT-III.
4. Rev engine up to 2,000 rpm.
5. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG VOL C/V” opening and check vacuum
existence.
Is the inspection result normal? YES >> GO TO 7.
NO >> GO TO 4.

EC
NP
O
3. Disconnect vacuum hose connected to EVAP canister
purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to EC-74, " System
Description " .
4. Start engine and let it idle.
Do not depress accelerator pedal even slightly.
5. Check vacuum gauge indication before 60 seconds passed after starting engine.
6. Revving engine up to 2,000rpm after 100 seconds passed after starting engine.
Is the inspection result normal? YES >> GO TO 7.
NO >> GO TO 4. System Description " .
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair it. YES-1 >> With CONSULT-III: GO TO 6.
YES-2 >> Without CONSULT-III: GO TO 7.
NO >> Repair or clean hoses and/or purge port. YES >> GO TO 8.
NO >> GO TO 7. Vacuum should not exist.
Vacuum should exist. SEF368U

EC-284< COMPONENT DIAGNOSIS >
[HR16DE]
P0442 EVAP CONTROL SYSTEM
P0442 EVAP CONTROL SYSTEM
DTC Logic INFOID:0000000004780172
DTC DETECTION LOGIC
NOTE:
If DTC P0442 is displayed with DTC P0456, first pe rform the trouble diagnosis for DTC P0456. Refer to
EC-335, " DTC Logic " .
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for l eaks in the line between the fuel tank and EVAP canister
purge volume control solenoid valve, under the following “Vacuum test” conditions.
The EVAP canister vent control valve is closed to s hut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold
vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.
CAUTION:
• Use only a genuine NISSAN fuel filler cap as a replacemen t. If an incorrect fuel filler cap is used, the
MIL may come on. DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0442 EVAP control system
small leak detected
(negative pressure) EVAP control system has a leak, EVAP
control system does not operate prop-
erly. • Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
• Foreign matter caught in EVAP canister vent con- trol valve.
• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid
valve and the circuit
• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is
missing or damaged
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Fuel level sensor and the circuit
• Refueling EVAP vapor cut valve
• ORVR system leaks
• Drain filter PBIB1026E

P0443 EVAP CANISTER PURGE VOLU
ME CONTROL SOLENOID VALVE
EC-295
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
2. Reconnect harness connectors disconnected.
3. Start engine.
4. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT- III. Check that engine speed var-
ies according to the valve opening.
Is the inspection result normal? YES >> GO TO 8.
NO >> GO TO 7. 7.
CHECK EVAP CANISTER PURGE VO LUME CONTROL SOLENOID VALVE
Refer to EC-296, " Component Inspection " .
Is the inspection result normal? YES >> GO TO 8.
NO >> Replace EVAP canister purge volume control solenoid valve. 8.
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EV AP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal? YES >> GO TO 9.
NO >> Clean the rubber tube using an air blower. 9.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-304, " Component Inspection " .
Is the inspection result normal? YES >> GO TO 10.
NO >> Replace EVAP canister vent control valve. 10.
CHECK IF EVAP CANISTER IS SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent c ontrol valve and EVAP control system pressure sensor
attached.
2. Check if water will drain from EVAP canister.
Does water drain from the EVAP canister?YES >> GO TO 11.
NO >> GO TO 13. 11.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EV AP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 1.9 kg (4.2 lb).
Is the inspection result normal? YES >> GO TO 13.
NO >> GO TO 12. 12.
DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and vehi cle frame for clogging or poor connection
>> Repair hose or replace EVAP canister. 13.
CHECK INTERMITTENT INCIDENT PBIB1213E

P0444, P0445 EVAP CANISTER PURG
E VOLUME CONTROL SOLENOID
VALVE
EC-297
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
P0444, P0445 EVAP CANISTER PU
RGE VOLUME CONTROL SOLENOID
VALVE
Description INFOID:0000000004780179
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel v apor from the EVAP canister. The EVAP
canister purge volume control solenoid valve is moved by ON/OFF
pulses from the ECM. The longer the ON pulse, the greater the
amount of fuel vapor that will flow through the valve.
DTC Logic INFOID:0000000004780180
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
CONDITIONING
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, confi rm battery voltage is more than 11 V at idle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 13 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected? YES >> Go to
EC-298, " Diagnosis Procedure " .
NO >> INSPECTION END JMBIA0069ZZ
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0444 EVAP canister purge volume
control solenoid valve circuit
open An excessively low voltage signal is sent
to ECM through the valve • Harness or connectors
(The solenoid valve circuit is open or
shorted.)
• EVAP canister purge volume control so- lenoid valve
P0445 EVAP canister purge volume
control solenoid valve circuit
shorted An excessively high voltage signal is sent
to ECM through the valve • Harness or connectors
(The solenoid valve circuit is shorted.)
• EVAP canister purge volume control so- lenoid valve