NISSAN LATIO 2009 Service Repair Manual

DTC P0181 FTT SENSOR
EC-755
< SERVICE INFOMATION >
[MR TYPE 1] C
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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.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 6.
NG >> GO TO 5. 5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B102, M13
• Harness for open or short between “fuel level sensor unit and fuel pump” and ground.
>> Repair open circuit or short to ground or short to power in harness or connectors. 6.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to, EC-755, " Component Inspection " .
OK or NG OK >> GO TO 7.
NG >> Replace “fuel level sensor unit and fuel pump”. 7.
CHECK INTERMITTENT INCIDENT
Perform EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537237
FUEL TANK TEMPERATURE SENSOR 1. Check resistance between “fuel level sensor unit and fuel pump” terminal 4 and 5 by heating with hot water as shown in the fig-
ure.
2. If NG, replace “fuel level sensor unit and fuel pump”.
Removal and Installation INFOID:0000000004537238
FUEL TANK TEMPERATURE SENSOR Refer to FL-5 .
Continuity should exist.
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90 PBIB0931E

EC-756< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0182, P0183 FTT SENSOR
DTC P0182, P0183 FTT SENSOR
Component Description INFOID:0000000004537239
The fuel tank temperature sensor (4) is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The elec trical resistance of the ther-
mistor decreases as temperature increases.
• Fuel level sensor unit and fuel pump (1)
• Fuel pressure regulator (2)
• Fuel level sensor (3)

*: This data is reference values and is measured between ECM terminal 43 (Fuel
tank temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result da mage the ECM's transistor. Use
ground other than ECM, such as ground.
On Board Diagn osis Logic INFOID:0000000004537240
DTC Confirmation Procedure INFOID:0000000004537241
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. 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-757, " Diagnosis Procedure " . BBIA0704E
Fluid temperature
°C ( °F) Voltage*
V Resistance
kΩ
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90 SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0182
0182 Fuel tank temperature
sensor circuit low input An excessively low voltage from the sensor is
sent to ECM. • Harness or connectors
(Fuel tank temperature sensor circuit is
open or shorted.)
• Fuel tank temperature sensor
P0183
0183 Fuel tank temperature
sensor circuit high input An excessively high voltage from the sensor is
sent to ECM.

DTC P0182, P0183 FTT SENSOR
EC-757
< SERVICE INFOMATION >
[MR TYPE 1] C
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Wiring Diagram
INFOID:0000000004537242
Diagnosis Procedure INFOID:00000000045372431.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " . BBWA2636E

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 P0182, P0183 FTT SENSOR
EC-759
< SERVICE INFOMATION >
[MR TYPE 1] C
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4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 6.
NG >> GO TO 5. 5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B102, M13
• Harness for open or short between “fuel level sensor unit and fuel pump” and ground
>> Repair open circuit or short to ground or short to power in harness or connector. 6.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to, EC-759, " Component Inspection " .
OK or NG OK >> GO TO 7.
NG >> Replace “fuel level sensor unit and fuel pump”. 7.
CHECK INTERMITTENT INCIDENT
Perform EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537244
FUEL TANK TEMPERATURE SENSOR 1. Check resistance between “fuel level sensor unit and fuel pump” terminal 4 and 5 by heating with hot water as shown in the fig-
ure.
2. If NG, replace “fuel level sensor unit and fuel pump”.
Removal and Installation INFOID:0000000004537245
FUEL TANK TEMPERATURE SENSOR Refer to FL-5 .
Continuity should exist.
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90 PBIB0931E

EC-760< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0222, P0223 TP SENSOR
DTC P0222, P0223 TP SENSOR
Component Description INFOID:0000000004537246
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 potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
CONSULT-III Reference Value in Data Monitor Mode INFOID:0000000004537247
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
On Board Diagn osis Logic INFOID:0000000004537248
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P0222 or P0223 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-874 .
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure INFOID:0000000004537249
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 8V at idle. PBIB0145E
MONITOR ITEM CONDITION SPECIFICATION
TP SEN 1-B1
TP SEN 2-B1* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released More than 0.36V
• Shift lever: D (A/T, CVT), 1st (M/T) Accelerator pedal: Fully depressed Less than 4.75VDTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0222
0222 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.)
(APP sensor 2 circuit is shorted.)
• Electric throttle control actuator (TP sensor 1)
• Accelerator pedal position sensor
(APP sensor 2)
P0223
0223 Throttle position sensor
1 circuit high input An excessively high voltage from the TP sensor
1 is sent to ECM. Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

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

DTC P0222, P
0223 TP SENSOR
EC-763
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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1. Disconnect electric throttle c
ontrol actuator (1) harness connec-
tor.
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between electric throttle control actuator terminal 2 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness connectors. 3.
CHECK THROTTLE POSITI ON SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 36 and electric throttle control actuator terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground or short to power.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK THROTTLE POSI TION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 33 and electric throttle control actuator terminal 1.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK THROTTLE POSITION SENSOR
Refer to EC-764, " Component Inspection " .
OK or NG OK >> GO TO 7.
NG >> GO TO 6. 6.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-572, " Throttle Valve Closed Position Learning " .
3. Perform EC-572, " Idle Air Volume Learning " . PBIB3325E
Voltage: Approximately 5V
PBIB3311E
Continuity should exist.
Continuity should exist.

EC-764< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0222, P0223 TP SENSOR
>> INSPECTION END 7.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537252
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-572, " Throttle Valve Closed Position Learning " .
3. Turn ignition switch ON.
4. Set shift lever to D position (A/T, CVT) or 1st position (M/T).
5. Check voltage between ECM terminals 33 (TP sensor 1 signal), 34 (TP sensor 2 signal) and ground under the following condi-
tions.
6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform EC-572, " Throttle Valve Closed Position Learning " .
8. Perform EC-572, " Idle Air Volume Learning " .
Removal and Installation INFOID:0000000004537253
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-141 .
Terminal Accelerator pedal Voltage
33
(Throttle position sensor 1) Fully released More than 0.36V
Fully depressed Less than 4.75V
34
(Throttle position sensor 2) Fully released Less than 4.75V
Fully depressed More than 0.36V PBIB3038E