O2 sensor NISSAN LATIO 2010 Service Repair Manual

FUEL PUMPEC-431
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3. Check resistance between “fuel level sensor unit and fuel pump”
terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace “fuel level sensor unit and fuel pump”.
Terminals Resistance
1 and 3 0.2 - 5.0 Ω [at 25°C (77 °F)]
SEC918C
Revision: January 20102010 Versa

EC-444
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
B: Cannot refuel/Fuel odor from the fuel
filler opening is strong while refueling.
Which symptom is present?
A>>GO TO 2.
B>>GO TO 8.
2.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be l ess than 1.9 kg (4.2 lb).
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Check if water will drain from EVAP canister.
Does water drain from the EVAP canister?
YES >> GO TO 4.
NO >> GO TO 7.
4.REPLACE EVAP CANISTER
Replace EVAP canister with a new one.
>> GO TO 5.
5.CHECK DRAIN FILTER
Refer to EC-448, "
Component Inspection (Drain filter)".
Is the inspection result normal?
OK >> GO TO 6.
NO >> Replace drain filter.
6.DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
7.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-446, "
Component Inspection (Refueli ng EVAP vapor cut valve)".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
8.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be l ess than 1.9 kg (4.2 lb).
Is the inspection result normal?
PBIB1213E
Revision: January 20102010 Versa

EC-450
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REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
DescriptionINFOID:0000000005398631
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function CheckINFOID:0000000005398632
1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-451, "
Diagnosis Procedure".
PBIB2657E
ECM Ground Voltage
Connector Terminal
F11 41
(Refrigerant pressure sensor signal) Ground 1.0 - 4.0V
PBIA9574J
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REFRIGERANT PRESSURE SENSOREC-451
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Wiring DiagramINFOID:0000000005398633
Diagnosis ProcedureINFOID:0000000005398634
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
BBWA2662E
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EC-452
< COMPONENT DIAGNOSIS >[HR16DE]
REFRIGERANT PRESSURE SENSOR
4. Check ground connections E15, E24. Refer to
EC-119, "Ground Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F8, E8
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between refrigerant pre ssure sensor harness connector and ECM harness connec-
tor.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F8, E8
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK REFRIGERANT PRESSURE SENSOR INPU T SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between ECM harness connecto r and refrigerant pressure sensor harness connec-
tor.
2. Also check harness for short to ground and short to power.
Refrigerant pressure sensor Ground Voltage
Connector Terminal
E17 3Ground Approx. 5 V
SEF479Y
Refrigerant pressure sensor ECM
Continuity
Connector Terminal Connector Terminal
E17 1F11 48 Existed
Refrigerant pressure sensor ECM
Continuity
Connector Terminal Connector Terminal
E17 2F11 41 Existed
Revision: January 20102010 Versa

REFRIGERANT PRESSURE SENSOREC-453
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Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F8, E8
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-114, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace refrigerant pressure sensor.
NO >> Repair or replace.
Revision: January 20102010 Versa

EC-454
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ECM
ECU DIAGNOSIS
ECM
Reference ValueINFOID:0000000005398635
VALUES ON THE DIAGNOSIS TOOL
Remarks:
• Specification data are reference values.
• Specification data are output/input values which are
detected or supplied by the ECM at the connector.
*Specification data may not be directly relat ed to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before m onitoring IGN TIMING, because the monitor may show the
specification data in spite of the ignition timing not bei ng adjusted to the specification data. this IGN TIMING
monitors the data calculated by the ECM according to the signals input from the camshaft position sensor and
other ignition timing related sensors.
Monitor Item Condition Values/Status
ENG SPEED • Run engine an d compare CONSULT-III value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-107, "
Diagnosis Procedure".
B/FUEL SCHDL See EC-107, "
Diagnosis Procedure".
A/F ALPHA-B1 See EC-107, "
Diagnosis Procedure".
COOLAN TEMP/S • Engine: After warming up More than 70°C (158F)
A/F SEN1 (B1) • Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) • Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1) LEAN ←→ RICH
VHCL SPEED SE • Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication. Almost the same speed as
speedometer indication
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9 V
Accelerator pedal: Fully depressed 4.0 - 4.8 V
ACCEL SEN 2 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9 V
Accelerator pedal: Fully depressed 3.9 - 4.8 V
TP SEN 1-B1 • Ignition switch: ON
(Engine stopped)
• Selector lever position: D (A/T) or 1st (M/T) Accelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1 • Ignition switch: ON
(Engine stopped)
• Selector lever position: D (A/T) or 1st (M/T) Accelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
START SIGNAL • Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS • Ignition switch: ON
(Engine stopped) Accelerator pedal:
Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG • Engine: After warming up, idle the
engine Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.) ON
P/N POSI SW • Ignition switch: ON Selector lever position: P or N (A/T) or
Neutral (M/T)
ON
Selector lever position: Except above OFF
Revision: January 20102010 Versa

EC-456
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ECM
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they
differ from
ECM terminals voltage signal.
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values and are measured between each terminal and ground.
• Pulse signal is measured by CONSULT-III.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doi ng so may result in dam-
age to the ECMs transistor. Use a ground ot her than ECM terminals, such as the ground.
COOLING FAN• Engine: After warning up, idle the
engine
• Air conditioner switch: OFF Engine coolant temperature is 98
°C
(208 °F) or less OFF
Engine coolant temperature is between
98 °C (208 °F) and 99 °C (210 °F) LOW
Engine coolant temperature is 100 °C
(212 °F) or more HIGH
HO2S2 HTR (B1) • Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load ON
VEHICLE SPEED • Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication. Almost the same speed as
the speedometer indication
IDL A/V LEARN • Engine: running Idle air volume learning has not been per-
formed yet.
YET
Idle air volume learning has already been
performed successfully. CMPLT
TRVL AFTER MIL • Ignition switch: ON Vehicle has traveled after MIL has turned
ON.0 - 65,535 km
(0 - 40,723 miles)
A/F S1 HTR (B1) • Engine: After warming up, idle the engine 40 - 100%
AC PRESS SEN • Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
HO2 S2 DIAG2 (B1) NOTE:
The item is indicated, but not used. —
Monitor Item
Condition Values/Status
PBIA9221J
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ECM
EC-457
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CONDITION DATA (DC Voltage)
1L Throttle control motor
(Open) [Ignition switch: ON]
• Engine stopped
• Selector lever position
: D (A/T), 1st (M/T)
• Accelerator pedal: Fully depressed Approximately 3.2 V
2SB Throttle contro
l motor power
supply [Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
3 G A/F sensor 1 heater [Engine is running]
•
Warm-up condition
• Idle speed (More than 140 seconds after starting en-
gine) Approximately 2.9 - 8.8 V
4 P Throttle contro l motor (Close)[Ignition switch: ON]
• Engine stopped
• Selector lever position
: D (A/T), 1st (M/T)
• Accelerator pedal: Fully released 0 - 14 V
5G Heated oxygen sensor 2
heater [Engine is running]
• Engine speed: Below 3,600 rpm after the
following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load. Approximately 10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm. BATTERY VOLTAGE
(11 - 14 V)
PBIA8150J
PBIA8148J
PBIA8149J
PBIA8148J
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ECM
EC-459
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L Fuel injector No. 4
Fuel injector No. 3
Fuel injector No. 2
Fuel injector No. 1 [Engine is running]
•
Warm-up condition
• Idle speed NOTE:
The pulse cycle changes depending on rpm
at idle. BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm BATTERY VOLTAGE
(11 - 14 V)
28 W EVAP canister vent control
valve [Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
32 P ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF 0 - 1.0 V
[Ignition switch: OFF]
• More than a few seconds after turning igni- tion switch OFF BATTERY VOLTAGE
(11 - 14 V)
33 LG Throttle position sensor 1 [Ignition switch: ON]
• Engine stopped
• Selector lever position
: D (A/T), 1st (M/T)
• Accelerator pedal: Fully released More than 0.36 V
[Ignition switch: ON]
• Engine stopped
• Selector lever position : D (A/T), 1st (M/T)
• Accelerator pedal: Fully depressed Less than 4.75 V
34 O Throttle position sensor 2 [Ignition switch: ON]
• Engine stopped
• Selector lever position
: D (A/T), 1st (M/T)
• Accelerator pedal: Fully released Less than 4.75 V
[Ignition switch: ON]
• Engine stopped
• Selector lever position : D (A/T), 1st (M/T)
• Accelerator pedal: Fully depressed More than 0.36 V
36 Y Sensor ground
(Throttle position sensor) [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
37 W Knock sensor [Engine is running]
• Idle speed
Approximately 2.5 V
38 P Engine coolant temperature
sensor
[Engine is running] Approximately 0 - 4.8 V
Output voltage varies with en-
gine coolant temperature.
40 — Sensor ground
(Knock sensor) [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
TERMI-
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NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)PBIB0529E
PBIA4943J
Revision: January 20102010 Versa