2011 NISSAN LATIO engine

DTC P0031, P0032 A/F SENSOR 1 HEATEREC-649
< SERVICE INFORMATION > [MR18DE]
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DTC P0031, P0032 A/F SENSOR 1 HEATER
DescriptionINFOID:0000000006341773
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F
sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element at the specified range.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000006341774
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000006341775
DTC Confirmation ProcedureINFOID:0000000006341776
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following pr ocedure, confirm that battery voltage is between 10.5 V and 16 V at
idle.
1. Start engine and run it for at least 10 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-651, "
Diagnosis Procedure".
SensorInput Signal to ECM ECM
function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Air fuel ratio (A/F) sensor 1
heater control Air fuel ratio (A/F) sensor 1 heat-
er
Mass air flow sensor Amount of intake air
Monitor item ConditionSpecification
A/F S1 HTR (B1) • Engine: After warming up, idle the engine
(More than 140 seconds after starting engine.) 4 - 100%
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
P0031
0031 Air fuel ratio (A/F)
sensor 1 heater
control circuit low The current amperage in
the air fuel ratio (A/F)
sensor 1 heater circuit is out of the normal range.
[An excessively low voltage signal is sent to ECM
through the air fuel ratio (A/F) sensor 1 heater.] • Harness or connectors
[Air fuel ratio (A/F) sensor 1 heater circuit is
open or shorted.]
• Air fuel ratio (A/F) sensor 1 heater
P0032
0032 Air fuel ratio (A/F)
sensor 1 heater
control circuit high The current amperage in
the air fuel ratio (A/F)
sensor 1 heater circuit is out of the normal range.
[An excessively high voltage signal is sent to ECM
through the air fuel ratio (A/F) sensor 1 heater.] • Harness or connectors
[Air fuel ratio (A/F) sensor 1 heater circuit is
shorted.]
• Air fuel ratio (A/F) sensor 1 heater
Revision: May 2010 2011 Versa

DTC P0031, P0032 A/F SENSOR 1 HEATEREC-651
< SERVICE INFORMATION > [MR18DE]
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Do not use ECM ground terminals wh
en measuring input/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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000006341778
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A/F ) sensor 1 harness connector (1).
2. Turn ignition switch ON.
- Air fuel ratio (A/F) sensor 1 (2)
TERMI-
NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
3 G A/F sensor 1 heater [Engine is running]
•
Warm-up condition
• Idle speed (More than 140 seconds after starting
engine) Approximately 2.9 - 8.8 V
49 W A/F sensor 1 [Engine is running]
•
Warm-up condition
• Engine speed: 2,000 rpm Approximately 1.8 V
Output voltage varies with air fuel
ratio.
53 B A/F sensor 1 [Ignition switch: ON] Approximately 2.2 V
PBIA8148J
:Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
BBIA0699E
Revision: May 2010 2011 Versa

EC-654
< SERVICE INFORMATION >[MR18DE]
DTC P0037, P0038 HO2S2 HEATER
DTC P0037, P0038 HO2S2 HEATER
DescriptionINFOID:0000000006341781
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxy
gen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000006341782
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000006341783
DTC Confirmation ProcedureINFOID:0000000006341784
NOTE:
If DTC Confirmation Procedure has been previously conducted, 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 that battery voltage is between 10.5 V and 16 V at
idle.
1. Start engine and warm it up to the normal operating temperature.
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor (PHASE) Engine speed
Heated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater
Crankshaft position sensor (POS)
Engine coolant temperature sensor
Engine coolant tempera-
ture
Mass air flow sensor Amount of intake air
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,600 OFF
• 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
Monitor item
Condition Specification
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
• Engine speed: Above 3,600 rpm OFF
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
P0037
0037 Heated oxygen
sensor 2 heater
control circuit low The current amperage in the heated oxygen sensor
2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.) • Harness or connectors
(Heated oxygen sensor 2 heater circuit is
open or shorted.)
• Heated oxygen sensor 2 heater
P0038
0038 Heated oxygen
sensor 2 heater
control circuit high The current amperage in the heated oxygen sensor
2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.) • Harness or connectors
(Heated oxygen sensor 2 heater circuit is
shorted.)
• Heated oxygen sensor 2 heater
Revision: May 2010 2011 Versa

DTC P0037, P0038 HO2S2 HEATER
EC-655
< SERVICE INFORMATION > [MR18DE]
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2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to
EC-656, "
Diagnosis Procedure".
Wiring DiagramINFOID:0000000006341785
BBWA2628E
Revision: May 2010 2011 Versa

EC-656
< SERVICE INFORMATION >[MR18DE]
DTC P0037, P0038 HO2S2 HEATER
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 ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000006341786
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
TER- MI-
NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
5G Heated oxygen sensor 2
heater [Engine is running]
• Engine speed: Below 3,600 rpm after the fol-
lowing 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)
50 W Heated oxygen sensor 2 [Engine is running]
• Revving engine from idle to 3,000 rpm quick-
ly 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. 0 - Approximately 1.0 V
59 O Sensor ground
(Heated oxygen sensor 2) [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
PBIA8148J
:
Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
Revision: May 2010 2011 Versa

DTC P0075 IVT CONTROL SOLENOID VALVEEC-659
< SERVICE INFORMATION > [MR18DE]
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DTC P0075 IVT CONTROL SOLENOID VALVE
Component DescriptionINFOID:0000000006341789
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
CONSULT-III Reference Val
ue in Data Monitor ModeINFOID:0000000006341790
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000006341791
DTC Confirmation ProcedureINFOID:0000000006341792
NOTE:
If DTC Confirmation Procedure has been previously conducted, alw ays turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
1. Start engine and let it idle for 5 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-661, "
Diagnosis Procedure".
PBIB1842E
Monitor item Condition Specification
INT/V SOL (B1) • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neu-
tral (M/T)
•No load Idle
0% - 2%
When revving engine up to 2,000 rpm
quickly Approx. 0% - 90%
DTC No. Trouble diagnosis name
DTC detecting condition Possible cause
P0075
0075 Intake valve timing control
solenoid valve circuit An improper voltage is sent to the ECM
through intake valve timing control solenoid
valve. • Harness or connectors
(Intake valve timing control solenoid valve
circuit is open or shorted.)
• Intake valve timing control solenoid valve
Revision: May 2010 2011 Versa

DTC P0075 IVT CONTROL SOLENOID VALVEEC-661
< SERVICE INFORMATION > [MR18DE]
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Do not use ECM ground terminals wh
en measuring input/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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000006341794
1.CHECK INTAKE VALVE TIMING CONTROL SO LENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake valve timing control solenoid valve (1) har- ness connector.
3. Turn ignition switch ON.
4. Check voltage between intake valve timing control solenoid valve terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.DETECT MALFUNCTION PART
Check the following.
TERMI- NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
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 ignition switch OFF BATTERY VOLTAGE
(11 - 14 V)
73 P Intake valve timing control
solenoid valve [Engine is running]
•
Warm-up condition
• Idle speed BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• When revving engine up to 2,000 rpm quickly 7 - 10 V
105 G Power supply for ECM [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
PBIA4937J
PBIB3323E
Voltage: Battery voltage
SEF212S
Revision: May 2010 2011 Versa

EC-664
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
DTC P0101 MAF SENSOR
Component DescriptionINFOID:0000000006341797
The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss.
Therefore, the electric current
supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000006341798
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000006341799
DTC Confirmation ProcedureINFOID:0000000006341800
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
PBIA9559J
Monitor item Condition Specification
MAS A/F SE-B1 • See EC-624
.
CAL/LD VALUE • Engine: After warming up
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Air conditioner switch: OFF
•No load Idle
10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW • Engine: After warming up
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Air conditioner switch: OFF
•No load Idle
1.0 - 4.0 g·m/s
2,500 rpm 4.0 - 10.0 g·m/s
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0101
0101 Mass air flow sensor cir-
cuit range/performance A)
A high voltage from the sensor is sent to ECM
under light load driving condition. • Harness or connectors
(Mass air flow sensor circuit is
open or shorted.)
• Mass air flow sensor
• EVAP control system pressure sensor
• Intake air temperature sensor
B) A low voltage from the sensor is sent to ECM un-
der heavy load driving condition. • Harness or connectors
(Mass air flow sensor circuit is
open or shorted.)
• Intake air leaks
• Mass air flow sensor
• EVAP control system pressure sensor
• Intake air temperature sensor
Revision: May 2010 2011 Versa