HO2s2 NISSAN LATIO 2011 Service Repair Manual

EC-2
System Diagram ....................................................56
System Description .................................................56
Component Parts Location ...................................57
Component Description ..........................................61
AIR CONDITIONING CUT CONTROL ..............63
System Diagram .................................................. ...63
System Description .................................................63
Component Parts Location ...................................64
Component Description ..........................................68
CAN COMMUNICATION ...................................70
System Description .................................................70
COOLING FAN CONTROL ...............................71
System Diagram .................................................. ...71
System Description .................................................71
Component Parts Location ...................................73
Component Description ..........................................77
EVAPORATIVE EMISSION SYSTEM ...............79
System Diagram .................................................. ...79
System Description .................................................79
Component Parts Location ...................................83
Component Description .........................................87
INTAKE VALVE TIMING CONTROL .................89
System Diagram .................................................. ...89
System Description .................................................89
Component Parts Location ...................................90
Component Description ..........................................94
ON BOARD DIAGNOSTIC (OBD) SYSTEM .....95
Diagnosis Description .......................................... ...95
GST (Generic Scan Tool) .......................................95
DIAGNOSIS SYSTEM (ECM) ............................96
DIAGNOSIS DESCRIPTION .................................. ...96
DIAGNOSIS DESCRIPTION : 1st Trip Detection
Logic and Two Trip Detection Logic .......................
96
DIAGNOSIS DESCRIPTION : DTC and Freeze
Frame Data .............................................................
96
DIAGNOSIS DESCRIPTION : Counter System .....97
DIAGNOSIS DESCRIPTION : Driving Pattern ......100
DIAGNOSIS DESCRIPTION : System Readiness
Test (SRT) Code ................................................. ..
101
DIAGNOSIS DESCRIPTION : Permanent Diag-
nostic Trouble Code (Permanent DTC) .................
102
DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL) ..................................................... ..
103
On Board Diagnosis Function ................................103
CONSULT-III Function ..........................................106
COMPONENT DIAGNOSIS .......................114
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ............................................................ .
114
Description ........................................................... ..114
Component Function Check ..................................114
Diagnosis Procedure .............................................115
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT .........................................................
122
Description ........................................................... .122
Diagnosis Procedure .............................................122
POWER SUPPLY AND GROUND CIRCUIT ....123
Wiring Diagram .................................................... .123
Diagnosis Procedure .............................................123
Ground Inspection .................................................127
U0101 CAN COMM CIRCUIT ...........................128
Description ........................................................... .128
DTC Logic .............................................................128
Wiring Diagram .....................................................129
Diagnosis Procedure .............................................129
U0140 CAN COMM CIRCUIT ...........................130
Description ........................................................... .130
DTC Logic .............................................................130
Wiring Diagram .....................................................131
Diagnosis Procedure .............................................131
U1001 CAN COMM CIRCUIT ...........................132
Description ........................................................... .132
DTC Logic .............................................................132
Wiring Diagram .....................................................133
Diagnosis Procedure .............................................133
P0011 IVT CONTROL ......................................134
DTC Logic ............................................................ .134
Diagnosis Procedure .............................................135
Component Inspection ..........................................136
P0031, P0032 A/F SENSOR 1 HEATER ..........138
Description ........................................................... .138
DTC Logic .............................................................138
Wiring Diagram .....................................................139
Diagnosis Procedure .............................................139
Component Inspection ..........................................141
P0037, P0038 HO2S2 HEATER .......................142
Description ........................................................... .142
DTC Logic .............................................................142
Wiring Diagram .....................................................143
Diagnosis Procedure .............................................143
Component Inspection ..........................................145
P0075 IVT CONTROL SOLENOID VALVE ......146
Description ........................................................... .146
DTC Logic .............................................................146
Wiring Diagram .....................................................147
Diagnosis Procedure .............................................147
Component Inspection ..........................................148
P0101 MAF SENSOR .......................................150
Description ........................................................... .150
DTC Logic .............................................................150
Component Function Check .................................151
Wiring Diagram .....................................................153
Diagnosis Procedure .............................................153
Component Inspection ..........................................155
Revision: May 2010 2011 Versa

EC-3
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P0102, P0103 MAF SENSOR ........................ ..158
Description .......................................................... ..158
DTC Logic .............................................................158
Wiring Diagram .....................................................159
Diagnosis Procedure .............................................159
Component Inspection ..........................................161
P0112, P0113 IAT SENSOR ............................164
Description .......................................................... ..164
DTC Logic .............................................................164
Wiring Diagram .....................................................165
Diagnosis Procedure .............................................165
Component Inspection ..........................................166
P0116 ECT SENSOR .......................................168
Description .......................................................... ..168
DTC Logic .............................................................168
Diagnosis Procedure .............................................169
Component Inspection ..........................................169
P0117, P0118 ECT SENSOR ...........................170
Description .......................................................... ..170
DTC Logic .............................................................170
Wiring Diagram .....................................................171
Diagnosis Procedure .............................................171
Component Inspection ..........................................172
P0122, P0123 TP SENSOR .............................174
Description .......................................................... ..174
DTC Logic .............................................................174
Wiring Diagram .....................................................175
Diagnosis Procedure .............................................175
Component Inspection ..........................................177
Special Repair Requirement .................................177
P0125 ECT SENSOR ..................................... ..178
Description .......................................................... ..178
DTC Logic .............................................................178
Diagnosis Procedure .............................................179
Component Inspection ..........................................179
P0127 IAT SENSOR .........................................181
Description .......................................................... ..181
DTC Logic .............................................................181
Diagnosis Procedure .............................................182
Component Inspection ..........................................182
P0128 THERMOSTAT FUNCTION ..................183
DTC Logic ........................................................... ..183
Diagnosis Procedure .............................................183
Component Inspection ..........................................184
P0130 A/F SENSOR 1 ......................................185
Description ............................................................185
DTC Logic .............................................................185
Component Function Check ..................................186
Wiring Diagram .....................................................188
Diagnosis Procedure .............................................188
P0131 A/F SENSOR 1 ......................................191
Description ............................................................191
DTC Logic ............................................................ ..191
Wiring Diagram ......................................................193
Diagnosis Procedure .............................................193
P0132 A/F SENSOR 1 ....................................196
Description .............................................................196
DTC Logic ..............................................................196
Wiring Diagram ......................................................198
Diagnosis Procedure .............................................198
P0133 A/F SENSOR 1 ....................................201
Description .............................................................201
DTC Logic ..............................................................201
Wiring Diagram ......................................................203
Diagnosis Procedure .............................................204
P0137 HO2S2 ..................................................207
Description .............................................................207
DTC Logic ..............................................................207
Component Function Check ..................................208
Wiring Diagram ......................................................210
Diagnosis Procedure .............................................210
Component Inspection ...........................................212
P0138 HO2S2 ..................................................215
Description .............................................................215
DTC Logic ..............................................................215
Component Function Check ..................................216
Wiring Diagram ......................................................218
Diagnosis Procedure .............................................218
Component Inspection ...........................................221
P0139 HO2S2 ..................................................224
Description .............................................................224
DTC Logic ..............................................................224
Component Function Check ..................................225
Wiring Diagram ......................................................227
Diagnosis Procedure .............................................227
Component Inspection ...........................................229
P0171 FUEL INJECTION SYSTEM FUNC-
TION ................................................................
232
DTC Logic ..............................................................232
Wiring Diagram ......................................................234
Diagnosis Procedure .............................................234
P0172 FUEL INJECTION SYSTEM FUNC-
TION ................................................................
238
DTC Logic ..............................................................238
Wiring Diagram ......................................................240
Diagnosis Procedure .............................................240
P0181 FTT SENSOR .......................................244
Description .............................................................244
DTC Logic ..............................................................244
Wiring Diagram ......................................................246
Diagnosis Procedure .............................................246
Component Inspection ...........................................248
P0182, P0183 FTT SENSOR ..........................249
Description .............................................................249
Revision: May 2010 2011 Versa

EC-8
Idle Air Volume Learning .......................................580
Fuel Pressure Check .............................................582
TROUBLE DIAGNOSIS ...................................585
Trouble Diagnosis Introduction ............................ ..585
DTC Inspection Priority Chart ................................590
Fail-Safe Chart ......................................................590
Symptom Matrix Chart ...........................................592
Engine Control Component Parts Location ...........596
Vacuum Hose Drawing ..........................................602
Circuit Diagram .................................................... ..603
ECM Harness Connector Terminal Layout ............605
ECM Terminal and Reference Value ................... ..605
CONSULT-III Function (ENGINE) .........................612
Generic Scan Tool (GST) Function .......................618
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
620
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE .............................................................
624
Description ........................................................... ..624
Testing Condition ...................................................624
Inspection Procedure .............................................624
Diagnosis Procedure .............................................624
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT ........................................................
632
Description ........................................................... ..632
Diagnosis Procedure .............................................632
POWER SUPPLY AND GROUND CIRCUIT ...633
Wiring Diagram .................................................... ..633
Diagnosis Procedure .............................................634
Ground Inspection .................................................638
DTC U0101 CAN COMMUNICATION LINE ....639
Description ........................................................... ..639
On Board Diagnosis Logic .....................................639
DTC Confirmation Procedure ................................639
Wiring Diagram ......................................................640
Diagnosis Procedure .............................................640
DTC U0140 CAN COMMUNICATION LINE ....641
Description ........................................................... ..641
On Board Diagnosis Logic .....................................641
DTC Confirmation Procedure ................................641
Wiring Diagram ......................................................642
Diagnosis Procedure .............................................642
DTC U1001 CAN COMMUNICATION LINE ....643
Description ........................................................... ..643
On Board Diagnosis Logic .....................................643
DTC Confirmation Procedure ................................643
Wiring Diagram ......................................................644
Diagnosis Procedure .............................................644
DTC P0011 IVT CONTROL .............................645
Description ........................................................... ..645
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
645
On Board Diagnosis Logic .....................................646
DTC Confirmation Procedure ............................... .646
Diagnosis Procedure .............................................647
Component Inspection ..........................................648
Removal and Installation .......................................648
DTC P0031, P0032 A/F SENSOR 1 HEATER ..649
Description ........................................................... .649
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
649
On Board Diagnosis Logic ....................................649
DTC Confirmation Procedure ................................649
Wiring Diagram .....................................................650
Diagnosis Procedure .............................................651
Component Inspection ..........................................652
Removal and Installation .......................................653
DTC P0037, P0038 HO2S2 HEATER ............ ..654
Description ........................................................... .654
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
654
On Board Diagnosis Logic ....................................654
DTC Confirmation Procedure ................................654
Wiring Diagram .....................................................655
Diagnosis Procedure .............................................656
Component Inspection ..........................................658
Removal and Installation .......................................658
DTC P0075 IVT CONTROL SOLENOID
VALVE ............................................................ ..
659
Component Description ....................................... .659
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
659
On Board Diagnosis Logic ....................................659
DTC Confirmation Procedure ................................659
Wiring Diagram .....................................................660
Diagnosis Procedure .............................................661
Component Inspection ..........................................662
Removal and Installation .......................................663
DTC P0101 MAF SENSOR ............................ ..664
Component Description ....................................... .664
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
664
On Board Diagnosis Logic ....................................664
DTC Confirmation Procedure ................................664
Overall Function Check .........................................665
Wiring Diagram .....................................................667
Diagnosis Procedure .............................................668
Component Inspection ..........................................670
Removal and Installation .......................................671
DTC P0102, P0103 MAF SENSOR ................ ..672
Component Description ....................................... .672
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
672
On Board Diagnosis Logic ....................................672
DTC Confirmation Procedure ................................672
Wiring Diagram .....................................................674
Diagnosis Procedure .............................................675
Component Inspection ..........................................677
Revision: May 2010 2011 Versa

EC-9
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Removal and Installation
.......................................
678
DTC P0112, P0113 IAT SENSOR .................. ..679
Component Description ....................................... ..679
On Board Diagnosis Logic ....................................679
DTC Confirmation Procedure ................................679
Wiring Diagram .....................................................680
Diagnosis Procedure .............................................680
Component Inspection ..........................................682
Removal and Installation .......................................682
DTC P0116 ECT SENSOR ............................. ..683
Component Description ....................................... ..683
On Board Diagnosis Logic ....................................683
DTC Confirmation Procedure ................................683
Diagnosis Procedure .............................................684
Component Inspection ..........................................684
Removal and Installation .......................................685
DTC P0117, P0118 ECT SENSOR ................ ..686
Component Description ....................................... ..686
On Board Diagnosis Logic ....................................686
DTC Confirmation Procedure ................................687
Wiring Diagram .....................................................688
Diagnosis Procedure .............................................688
Component Inspection ..........................................690
Removal and Installation .......................................690
DTC P0122, P0123 TP SENSOR ................... ..691
Component Description ....................................... ..691
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
691
On Board Diagnosis Logic ....................................691
DTC Confirmation Procedure ................................691
Wiring Diagram .....................................................692
Diagnosis Procedure .............................................693
Component Inspection ..........................................695
Removal and Installation .......................................695
DTC P0125 ECT SENSOR ............................. ..696
Component Description ....................................... ..696
On Board Diagnosis Logic ....................................696
DTC Confirmation Procedure ................................696
Diagnosis Procedure .............................................697
Component Inspection ..........................................698
Removal and Installation .......................................698
DTC P0127 IAT SENSOR .............................. ..699
Component Description ....................................... ..699
On Board Diagnosis Logic ....................................699
DTC Confirmation Procedure ................................699
Diagnosis Procedure .............................................700
Component Inspection ..........................................700
Removal and Installation .......................................701
DTC P0128 THERMOSTAT FUNCTION ........ ..702
On Board Diagnosis Logic .................................. ..702
DTC Confirmation Procedure ................................702
Diagnosis Procedure .............................................702
Component Inspection ..........................................703
Removal and Installation ..................................... ..703
DTC P0130 A/F SENSOR 1 ............................704
Component Description .........................................704
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
704
On Board Diagnosis Logic .....................................704
DTC Confirmation Procedure ................................704
Overall Function Check .........................................705
Wiring Diagram ......................................................706
Diagnosis Procedure .............................................707
Removal and Installation .......................................709
DTC P0131 A/F SENSOR 1 ............................710
Component Description .........................................710
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
710
On Board Diagnosis Logic .....................................710
DTC Confirmation Procedure ................................710
Wiring Diagram ......................................................712
Diagnosis Procedure .............................................713
Removal and Installation .......................................715
DTC P0132 A/F SENSOR 1 ............................716
Component Description .........................................716
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
716
On Board Diagnosis Logic .....................................716
DTC Confirmation Procedure ................................716
Wiring Diagram ......................................................718
Diagnosis Procedure .............................................719
Removal and Installation .......................................721
DTC P0137 HO2S2 .........................................722
Component Description .........................................722
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
722
On Board Diagnosis Logic .....................................722
DTC Confirmation Procedure ................................723
Overall Function Check .........................................723
Wiring Diagram ......................................................725
Diagnosis Procedure .............................................726
Component Inspection ...........................................728
Removal and Installation .......................................730
DTC P0138 HO2S2 .........................................731
Component Description .........................................731
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
731
On Board Diagnosis Logic .....................................731
DTC Confirmation Procedure ................................732
Overall Function Check .........................................732
Wiring Diagram ......................................................734
Diagnosis Procedure .............................................735
Component Inspection ...........................................738
Removal and Installation .......................................740
DTC P0139 HO2S2 .........................................741
Component Description .........................................741
Revision: May 2010 2011 Versa

DIAGNOSIS SYSTEM (ECM)EC-109
< FUNCTION DIAGNOSIS > [HR16DE]
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OA/F ALPHA-B1
%• The mean value of the air-fuel ratio feedback correc-
tion factor per cycle is indicated. • When the engine is stopped, a certain
value is indicated.
• This data also includes the data for the air-fuel ratio learning control.
• When engine is running specification
range is indicated in “SPEC”.
COOLAN TEMP/S °C or °F • The engine coolant temperature (determined by the
signal voltage of the engine coolant temperature sen-
sor) is displayed. • When the engine coolant temperature
sensor is open or short-circuited,
ECM enters fail-safe mode. The en-
gine coolant temperature determined
by the ECM is displayed.
A/F SEN1 (B1) V• The A/F signal computed from the input signal of the
air fuel ratio (A/F) se nsor 1 is displayed.
HO2S2 (B1) V• The signal voltage of the heated oxygen sensor 2 is
displayed.
HO2S2 MNTR(B1) RICH/
LEAN • Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three way
catalyst is relatively small.
LEAN: means the amount of oxygen after three way
catalyst is relatively large. • When the engine is stopped, a certain
value is indicated.
VHCL SPEED SE km/h or
mph • The vehicle speed computed from the vehicle speed
signal sent from combination meter is displayed.
BATTERY VOLT V • The power supply voltage of ECM is displayed.
ACCEL SEN 1 V• The accelerator pedal position sensor signal voltage is
displayed. • ACCEL SEN 2 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
ACCEL SEN 2
TP SEN 1-B1
V• The throttle position sensor signal voltage is dis-
played. • TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1
FUEL T/TMP SE
°C or °F • The fuel temperature (determined by the signal volt-
age of the fuel tank temperature sensor) is displayed.
INT/A TEMP SE °C or °F • The intake air temperature (determined by the signal
voltage of the intake air temperature sensor) is indicat-
ed.
EVAP SYS PRES V • The signal voltage of EVAP control system pressure
sensor is displayed.
FUEL LEVEL SE V • The signal voltage of the fuel level sensor is displayed.
START SIGNAL ON/OFF • Indicates start signal status [ON/OFF] computed by
the ECM according to the signals of engine speed and
battery voltage. • After starting the engine, [OFF] is dis-
played regardless of the starter sig-
nal.
CLSD THL POS ON/OFF • Indicates idle position [ON/OFF] computed by ECM
according to the accelerator pedal position sensor sig-
nal.
AIR COND SIG ON/OFF • Indicates [ON/OFF] condition of the air conditioner
switch determined by the air conditioner ON signal.
P/N POSI SW ON/OFF • Indicates [ON/OFF] condit
ion from the park/neutral
position (PNP) signal.
PW/ST SIGNAL ON/OFF • [ON/OFF] condition of the power steering system (de-
termined by the signal sent from EPS control unit) is
indicated.
LOAD SIGNAL ON/OFF • Indicates [ON/OFF] condition from the electrical load
signal.
ON: Rear window defogger switch is ON and/or light-
ing switch is in 2nd position.
OFF: Both rear window defogger switch and lighting
swi t
ch

are OFF.
Monitored item Unit
DescriptionRemarks
Revision: May 2010 2011 Versa

EC-110
< FUNCTION DIAGNOSIS >[HR16DE]
DIAGNOSIS SYSTEM (ECM)
IGNITION SW ON/OFF• Indicates [ON/OFF] condition from ignition switch sig-
nal.
HEATER FAN SW ON/OFF • Indicates [ON/OFF] condition from the heater fan
switch signal.
BRAKE SW ON/OFF• Indicates [ON/OFF] condition from the stop lamp
switch signal.
INJ PULSE-B1 msec • Indicates the actual fuel injection pulse width compen-
sated by ECM according to the input signals. • When the engine is stopped, a certain
computed value is indicated.
IGN TIMING BTDC• Indicates the ignition timing computed by ECM ac-
cording to the input signals. • When the engine is stopped, a certain
value is indicated.
CAL/LD VALUE %• “Calculated load value” indicates the value of the cur-
rent air flow divided by peak air flow.
MASS AIRFLOW g/s • Indicates the mass air flow computed by ECM accord-
ing to the signal voltage of the mass air flow sensor.
PURG VOL C/V % • Indicates the EVAP canister purge volume control so-
lenoid valve control value computed by the ECM ac-
cording to the input signals.
• The opening becomes larger as the value increases.
INT/V TIM(B1) °CA • Indicates [ °CA] of intake camshaft advance angle.
INT/V SOL(B1) %• The control value of the intake valve timing control so-
lenoid valve (determined by ECM according to the in-
put signals) is indicated.
• The advance angle becomes larger as the value in-
creases.
AIR COND RLY ON/OFF • The air conditioner relay control condition (determined
by ECM according to the input signals) is indicated.
FUEL PUMP RLY ON/OFF • Indicates the fuel pump relay control condition deter-
mined by ECM according to the input signals.
VENT CONT/V ON/OFF • The control condition of the EVAP canister vent control
valve (determined by ECM according to the input sig-
nals) is indicated.
ON: Closed
OFF: Open
THRTL RELAY ON/OFF • Indicates the throttle contro
l motor relay control condi-
tion determined by the ECM according to the input sig-
nals.
COOLING FAN HI/LOW/
OFF• Indicates the condition of the cooling fan (determined
by ECM according to the input signals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S2 HTR (B1) ON/OFF • Indicates [ON/OFF] condition of heated oxygen sen-
sor 2 heater determined by ECM according to the in-
put signals.
I/P PULLY SPD rpm • Indicates the engine speed computed from the prima-
ry sped sensor signal.
VEHICLE SPEED km/h or
mph • The vehicle speed computed from the vehicle speed
signal sent from TCM is displayed.
IDL A/V LEARN YET/CM-
PLT • Display the condition of Idle Air Volume Learning
YET: Idle air volume learning has not been performed
yet.
CMPLT: Idle air volume learning has already been per-
formed successfully.
TRVL AFTER MIL km or
mile • Distance traveled while MIL is activated.
Monitored item Unit
DescriptionRemarks
Revision: May 2010 2011 Versa

DIAGNOSIS SYSTEM (ECM)EC-113
< FUNCTION DIAGNOSIS > [HR16DE]
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DTC WORK SUPPORT Mode
*: DTC P1442 and P1456 does not apply to C11 model
s but appears in DTC Work Support Mode screens.
Test modeTest itemCorresponding DTC No. Reference page
EVAPORATIVE SYSTEM EVP SML LEAK P044
2/P1442* P0455EC-333
EVP V/S LEAK P0456/P1456* P0442
EC-288P0456EC-339
A/F SEN1 A/F SEN1 (B1) P1278/P1279 P0133
EC-201A/F SEN1 (B1) P1276P0130EC-185
HO2S2 HO2S2 (B1) P1146
P0138EC-215HO2S2 (B1) P1147 P0137EC-207
HO2S2 (B1) P139 P0139EC-224
Revision: May 2010 2011 Versa

EC-142
< COMPONENT DIAGNOSIS >[HR16DE]
P0037, P0038 HO2S2 HEATER
P0037, P0038 HO2S2 HEATER
DescriptionINFOID:0000000005929823
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
DTC LogicINFOID:0000000005929824
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Heated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
Engine speed Heated oxygen sensor 2 heater
Above 3,600 rpm 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
DTC No. Trouble diagnosis name
DTC detecting conditionPossible cause
P0037 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
(The heated oxygen sensor 2 heater
circuit is open or shorted.)
• Heated oxygen sensor 2 heater
P0038 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
(The heated oxygen sensor 2 heater
circuit is shorted.)
• Heated oxygen sensor 2 heater
Revision: May 2010 2011 Versa

P0037, P0038 HO2S2 HEATEREC-143
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YES >> Go to EC-143, "Diagnosis Procedure".
NO >> INSPECTION END
Wiring DiagramINFOID:0000000005929825
Diagnosis ProcedureINFOID:0000000005929826
1.CHECK GROUND CONNECTION
BBWA2628E
Revision: May 2010 2011 Versa

EC-144
< COMPONENT DIAGNOSIS >[HR16DE]
P0037, P0038 HO2S2 HEATER
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. Refer to
EC-127, "
Ground Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
2. Turn ignition switch ON.
3. Check the voltage between HO2S2 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 E8, F8
• IPDM E/R connector E45
• 10 A fuse (No. 54)
• Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between HO2S2 harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to EC-145, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to EX-5, "
Component".
CAUTION:
• Discard any 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 sensor, clean exhaust system threads usi ng Oxygen Sensor Thread Cleaner
[commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial
service tool).
HO2S2 Ground Voltage
Connector Terminal
F13 2 Ground Battery voltage
MBIB0186E
HO2S2 ECM
Continuity
Connector Terminal Connector Terminal
F13 3F10 5Existed
Revision: May 2010 2011 Versa