2009 NISSAN LATIO ESP

EC-232< COMPONENT DIAGNOSIS >
[HR16DE]
P0171 FUEL INJECTION SYSTEM FUNCTION
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected? YES >> Repair or replace.
NO >> GO TO 2. 2.
CHECK FOR INTAKE AIR LEAK
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
Intake air leak detected? YES >> Repair or replace.
NO >> GO TO 3. 3.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
5. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
6. Also check harness for short to power.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK FUEL PRESSURE
1. Check fuel pressure. Refer to EC-498, " Inspection " .
Is the inspection result normal? YES >> GO TO 6. PBIB1216E
A/F sensor 1 ECM
Continuity
Connector Terminal Connector Terminal
F12 1
F11 49
Existed
2 53
A/F sensor 1 Ground Continuity
Connector Terminal
F12 1
Ground Not existed
2
ECM Ground Continuity
Connector Terminal
F11 49
Ground Not existed
53

EC-238< COMPONENT DIAGNOSIS >
[HR16DE]
P0172 FUEL INJECTION SYSTEM FUNCTION
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected? YES >> Repair or replace.
NO >> GO TO 2. 2.
CHECK FOR 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 3. 3.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
5. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
6. Also check harness for short to power.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK FUEL PRESSURE
1. Check fuel pressure. Refer to EC-498, " Inspection " .
Is the inspection result normal? YES >> GO TO 6.
NO >> GO TO 5. PBIB1216E
A/F sensor 1 ECM
Continuity
Connector Terminal Connector Terminal
F12 1
F11 49
Existed
2 53
A/F sensor 1 Ground Continuity
Connector Terminal
F12 1
Ground Not existed
2
ECM Ground Continuity
Connector Terminal
F11 49
Ground Not existed
53

P0222, P0223 TP SENSOR
EC-249
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
P0222, P0223 TP SENSOR
Description INFOID:0000000004780147
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC Logic INFOID:0000000004780148
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
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 8 V at idle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected? YES >> Go to
EC-250, " Diagnosis Procedure " .
NO >> INSPECTION END PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0222 Throttle position sensor
1 circuit low input An excessively low voltage from the TP sensor
1 is sent to ECM. • Harness or connectors
(TP sensor 1 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 1)
P0223 Throttle position sensor
1 circuit high input An excessively high voltage from the TP sensor
1 is sent to ECM.

EC
NP
O
P0447 EVAP CANISTER VENT CONTROL VALVE
Description INFOID:0000000004780183
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
DTC Logic INFOID:0000000004780184
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE YES >> Go to
EC-302, " Diagnosis Procedure " .
NO >> INSPECTION END

EC-306< COMPONENT DIAGNOSIS >
[HR16DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
P0448 EVAP CANISTER VENT CONTROL VALVE
Description INFOID:0000000004780187
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
DTC Logic INFOID:0000000004780188
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
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.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON and wait at least 5 seconds.
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. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures three times.
- Increase the engine speed up to 3,000 to 3,500 rpm and keep it for 2 minutes and 50 seconds to 3 min-
utes.
Never exceed 3 minutes.
- Fully released accelerator pedal and keep engine idle for about 5 seconds.
6. Repeat next procedure 20 times.
- Quickly increase the engine speed up to 4,000 to 4, 500 rpm or more and keep it for 25 to 30 seconds. PBIB1263E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0448 EVAP canister vent control
valve close EVAP canister vent control valve remains
closed under specified driving conditions. • EVAP canister vent control valve
• EVAP control system pressure sensor and the circuit
• Blocked rubber tube to EVAP canister
vent control valve
• EVAP canister is saturated with water

P0456 EVAP CONTROL SYSTEM
EC-335
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
P0456 EVAP CONTROL SYSTEM
DTC Logic INFOID:0000000004780206
DTC DETECTION LOGIC This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume
control solenoid valve, using the intake manifold vac uum in the same way as conventional EVAP small leak
diagnosis.
If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.
If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.
If ECM judges there are no leaks, the diagnosis will be OK.
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.
• If the fuel filler cap is not tigh tened properly, the MIL may come on.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0456 Evaporative emission
control system very
small leak (negative
pressure check) • EVAP system has a very small leak.
• EVAP 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 miss-
ing or damaged
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling EVAP vapor cut valve
• ORVR system leaks
• Fuel level sensor and the circuit
• Foreign matter caught in EVAP canister purge vol- ume control solenoid valve
• Drain filter PBIB1026E

EC
NP
O
P1148 CLOSED LOOP CONTROL
DTC Logic INFOID:0000000004780249
DTC DETECTION LOGIC NOTE:
DTC P1148 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosi s for the corresponding DTC.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1148 Closed loop control function The closed loop control function for bank 1 does
not operate even when vehicle is driving in the
specified condition. • Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
• A/F sensor 1
• A/F sensor 1 heater
The closed loop control function for bank 2 does
not operate even when vehicle is driving in the
specified condition.

EC-372< COMPONENT DIAGNOSIS >
[HR16DE]
P1225 TP SENSOR
P1225 TP SENSOR
Description INFOID:0000000004780253
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC Logic INFOID:0000000004780254
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
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 10 V at idle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
Is 1st trip DTC detected? YES >> Go to
EC-372, " Diagnosis Procedure " .
NO >> INSPECTION END
Diagnosis Procedure INFOID:00000000047802551.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct. PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1225 Closed throttle position
learning performance Closed throttle position learning value is excessively
low. • Electric throttle control actuator
(TP sensor 1 and 2)