2009 NISSAN LATIO Service Repair Manual

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Page 2001 of 4331

NISSAN LATIO 2009 Service Repair Manual EC
NP
O
DTC P0037, P0038 HO2S2 HEATER
Description INFOID:0000000004537096
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
am

EC
NP
O
DTC P0037, P0038 HO2S2 HEATER
Description INFOID:0000000004537096
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-III Reference Val ue in Data Monitor Mode INFOID:0000000004537097
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004537098
DTC Confirmation Procedure INFOID:0000000004537099
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, confi rm that battery voltage is between 10.5V and 16V 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 control Heated 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 ONMONITOR 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

Page 2002 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-646< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0037, P0038 HO2S2 HEATER
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

Page 2003 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0037, P0038
HO2S2 HEATER
EC-647
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Specification data are reference values
and are measured between each terminal and ground.
Pul

Page 2004 of 4331

NISSAN LATIO 2009 Service Repair Manual OK >> GO TO 4.
NG >> GO TO 3. OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Component Inspection " .
OK or NG OK >> GO TO 6.
NG >> Replace hea

Page 2005 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0037, P0038
HO2S2 HEATER
EC-649
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Component Inspection
INFOID:0000000004537102
HEATED OXYGEN SENSOR 2 HEATER 1. Check resistance

Page 2006 of 4331

NISSAN LATIO 2009 Service Repair Manual Diagnosis Procedure " .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
thro

Page 2007 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0075 IVT CONTROL SOLENOID VALVE
EC-651
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Wiring Diagram
INFOID:0000000004537108
Specification data are reference values and are m

Page 2008 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-652< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0075 IVT CONTROL SOLENOID VALVE
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECMs transis

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