2008 NISSAN LATIO Service Repair Manual

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Page 1225 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0031, P0032 A/F SENSOR 1 HEATER
EC-151
< SERVICE INFORMATION >
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DTC P0031, P0032 A/F SENSOR 1 HEATER
DescriptionINFOID:0000000001702624
SYSTEM DESCRIPTION
The ECM p

DTC P0031, P0032 A/F SENSOR 1 HEATER
EC-151
< SERVICE INFORMATION >
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DTC P0031, P0032 A/F SENSOR 1 HEATER
DescriptionINFOID:0000000001702624
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-II Reference Value in Data Monitor ModeINFOID:0000000001702625
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702626
DTC Confirmation ProcedureINFOID:0000000001702627
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, confirm that battery voltage is between 10.5V and 16V at
idle.
With CONSULT-II
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine and run it for at least 10 seconds at idle speed.
3. If 1st trip DTC is detected, go to EC-153, "
Diagnosis Procedure".
Sensor Input Signal to ECMECM
functionActuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speed
Air fuel ratio (A/F) sensor 1
heater controlAir fuel ratio (A/F) sensor 1 heat-
er
Mass air flow sensor Amount of intake air
MONITOR ITEM CONDITION SPECIFICATION
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
nameDTC detecting condition Possible cause
P0031
0031Air fuel ratio (A/F)
sensor 1 heater
control circuit lowThe 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
0032Air fuel ratio (A/F)
sensor 1 heater
control circuit highThe 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
SEF058Y

Page 1226 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-152
< SERVICE INFORMATION >
DTC P0031, P0032 A/F SENSOR 1 HEATER
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Wiring DiagramINFOID:0000000001702628
Specification data are reference v

Page 1227 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0031, P0032 A/F SENSOR 1 HEATER
EC-153
< SERVICE INFORMATION >
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Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring inpu

Page 1228 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-154
< SERVICE INFORMATION >
DTC P0031, P0032 A/F SENSOR 1 HEATER
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)
3

Page 1229 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0031, P0032 A/F SENSOR 1 HEATER
EC-155
< SERVICE INFORMATION >
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1. Check resistance between A/F sensor 1 terminals as follows.
2. If NG, replace air fuel ratio (A/F

Page 1230 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-156
< SERVICE INFORMATION >
DTC P0037, P0038 HO2S2 HEATER
DTC P0037, P0038 HO2S2 HEATER
DescriptionINFOID:0000000001702632
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen se

EC-156
< SERVICE INFORMATION >
DTC P0037, P0038 HO2S2 HEATER
DTC P0037, P0038 HO2S2 HEATER
DescriptionINFOID:0000000001702632
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702633
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702634
DTC Confirmation ProcedureINFOID:0000000001702635
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, confirm that battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT-II
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 sensorEngine coolant tempera-
ture
Mass air flow sensor Amount of intake air
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,600OFF
• 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 loadON
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
nameDTC detecting condition Possible cause
P0037
0037Heated oxygen
sensor 2 heater
control circuit lowThe 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
0038Heated oxygen
sensor 2 heater
control circuit highThe 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

Page 1231 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0037, P0038 HO2S2 HEATER
EC-157
< SERVICE INFORMATION >
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1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
2. Start engine and warm it

Page 1232 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-158
< SERVICE INFORMATION >
DTC P0037, P0038 HO2S2 HEATER
Wiring Diagram
INFOID:0000000001702636
Specification data are reference values and are measured between each terminal and ground.
Pulse sig

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