2009 NISSAN LATIO check engine

EC-754< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0181 FTT SENSOR
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit and fuel pump” harness con- nector (1).
- : Vehicle front
3. Turn ignition switch ON.
4. Check voltage between “fuel level sensor unit and fuel pump” terminal 4 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 4.
NG >> GO TO 3. 3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness connectors M69, E7
• Harness connectors B102, M13
• Harness for open or short between ECM and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connector. 4.
CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF. :
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E
BBIA0702E
Voltage: Approximately 5V
PBIB0932E

EC-758< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0182, P0183 FTT SENSOR
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect “fuel level sensor unit and fuel pump” harness con- nector (1).
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between “fuel level sensor unit and fuel pump” terminal 4 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 4.
NG >> GO TO 3. 3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness connectors M69, E7
• Harness connectors B102, M13
• Harness for open or short to ground or short between ECM and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connector. 4.
CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination meter harness connector.
3. Check harness continuity between “fuel level sens or unit and fuel pump” terminal 5 and combination
meter terminal 24. Refer to Wiring Diagram. :
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E
BBIA0702E
Voltage: Approximately 5V
PBIB0932E

DTC P0222, P
0223 TP SENSOR
EC-761
< SERVICE INFOMATION >
[MR TYPE 1] C
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1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to EC-762, " Diagnosis Procedure " .
Wiring Diagram INFOID:0000000004537250 BBWA2655E

EC-762< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0222, P0223 TP SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
Diagnosis Procedure INFOID:00000000045372511.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK THROTTLE POSITION SE NSOR 1 POWER SUPPLY CIRCUIT-I
TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
33 LG Throttle position sensor 1 [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released More than 0.36V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressed Less than 4.75V
34 O Throttle position sensor 2 [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released Less than 4.75V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressed More than 0.36V
36 Y Sensor ground
(Throttle position sensor) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
72 V Sensor power supply
(Throttle position sensor) [Ignition switch: ON]
Approximately 5V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

EC
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DTC P0300 - P0304 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 4 CYLINDER
MISFIRE
On Board Diagnosis Logic INFOID:0000000004537254
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary , ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage) On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor (POS) signal every 200 engine revo-
lutions for a change.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration) For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. Du ring this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure INFOID:0000000004537255
CAUTION:
Always drive vehicle in safe manner according to traf fic conditions and obey all traffic laws when driv-
ing.
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 warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Restart engine and let it idle for about 15 minutes.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to EC-766, " Diagnosis Procedure " .
NOTE:
If 1st trip DTC is not detected during above proc edure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditi ons to (1st trip) Freeze Frame Data for a certain
time. Refer to table below. Sensor Input Signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300
0300 Multiple cylinder misfire
detected Multiple cylinder misfire.
• Improper spark plug
• Insufficient compression
• Incorrect fuel pressure
• Fuel injector circuit is open or shorted
• Fuel injector
• Intake air leak
• The ignition signal circuit is open or shorted
• Lack of fuel
• Drive plate or flywheel
• Air fuel ratio (A/F) sensor 1
• Incorrect PCV hose connection
P0301
0301 No.1 cylinder misfire de-
tected No. 1 cylinder misfires.
P0302
0302 No. 2 cylinder misfire
detected No. 2 cylinder misfires.
P0303
0303 No. 3 cylinder misfire
detected No. 3 cylinder misfires.
P0304
0304 No. 4 cylinder misfire
detected No. 4 cylinder misfires.

DTC P0300 - P0304 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-767
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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No >> GO TO 9. 4.
CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No Yes >> GO TO 5.
No >> Check fuel injector(s) and circuit(s). Refer to EC-986 .
5.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pres-
sure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
- : Vehicle front
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 avoid the electri- cal 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 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:
• Do not approach to the spar k plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the el ectrical discharge voltage
becomes 20kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG OK >> GO TO 9.
NG >> GO TO 6. 6.
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. PBIB3332E
Spark should be generated. PBIB2958E
PBIB2325E

EC-768< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0300 - P0304 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
OK or NG OK >> GO TO 7.
NG >> Check ignition coil, power transistor and their circuits. Refer to EC-996 .
7.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG OK >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-227, " Standard and Limit " .
NG >> 1. Repair or clean spark plug.
2. GO TO 8. 8.
CHECK FUNCTION OF IGNITION COIL-III
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.
OK or NG OK >>
INSPECTION END
NG >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-227, " Standard
and Limit " .
9.
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-185, " On-Vehicle Service " .
OK or NG OK >> GO TO 10.
NG >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets. 10.
CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-574, " Fuel Pressure Check " .
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-574, " Fuel Pressure Check " .
OK or NG OK >> GO TO 12.
NG >> GO TO 11. 11.
DETECT MALFUNCTIONING PART
Check the following.
• Fuel pump and circuit (Refer to EC-991 .)
• Fuel pressure regulator (Refer to EC-574, " Fuel Pressure Check " .)
• Fuel lines (Refer to EM-156 .)
• Fuel filter for clogging
>> Repair or replace. 12.
CHECK IGNITION TIMING
Check the following items. Refer to EC-566, " Basic Inspection " .
Spark should be generated.
SEF156I
Spark should be generated.
At idling: Approximately 350 kPa (3.57 kg/cm 2
, 51 psi)

DTC P0300 - P0304 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-769
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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OK or NG OK >> GO TO 13.
NG >> Follow the EC-566, " Basic Inspection " .
13.
CHECK AIR FUEL RATIO (A/F) SENS OR 1 CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect air fuel ratio (A/F ) sensor 1 harness connector (1).
- Air fuel ratio (A/F) sensor 1 (2)
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
5. Check harness continuity between ECM terminals 49, 53 or A/F sensor 1 terminals 1, 2 and ground.
Refer to Wiring Diagram.
6. Also check harness for short to power.
OK or NG OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 14.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to EC-643, " Component Inspection " .
OK or NG OK >> GO TO 16.
NG >> GO TO 15. 15.
REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1.
CAUTION:
• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
• Before installing new A/F senso r, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>> INSPECTION END 16.
CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-III. Items Specifications
Target idle speed A/T: 700
± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)
M/T: 700 ± 50 rpm (in Neutral position)
Ignition timing A/T: 13
± 5 ° BTDC (in P or N position)
CVT: 13 ± 5 ° BTDC (in Neutral position)
M/T: 13 ± 5 ° BTDC (in Neutral position) A/F sensor 1 terminal ECM terminal
1 49
2 53
Continuity should exist.
Continuity should not exist. BBIA0699E