2008 INFINITI FX35 Service Manual

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Page 1985 of 3924

INFINITI FX35 2008 Service Manual
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-745
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
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K L
M A
EC
NP
O
Check resistance between terminals 3 and 4.
Check continuity between termina

Page 1986 of 3924

INFINITI FX35 2008 Service Manual
EC-746
< SERVICE INFORMATION >[VK45DE]
DTC P0037, P
0038, P0057, P0058 HO2S2 HEATER
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
DescriptionINFOID:0000000001326570
SYSTEM DESCRIPTION
The ECM performs

EC-746
< SERVICE INFORMATION >[VK45DE]
DTC P0037, P
0038, P0057, P0058 HO2S2 HEATER
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
DescriptionINFOID:0000000001326570
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:0000000001326571
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000001326572
DTC Confirmation ProcedureINFOID:0000000001326573
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:
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 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)
HO2S2 HTR (B2) 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
(Bank 1) Heated oxygen
sensor 2 heater
control circuit low The current amperage in the heated oxygen sen-
sor 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
P0057
0057
(Bank 2)
P0038
0038
(Bank 1)
Heated oxygen
sensor 2 heater
control circuit high The current amperage in the heated oxygen sen-
sor 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
P0058
0058
(Bank 2)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 1987 of 3924

INFINITI FX35 2008 Service Manual
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-747
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Before performing the following procedure, confi
rm that battery voltage is between

Page 1988 of 3924

INFINITI FX35 2008 Service Manual
EC-748
< SERVICE INFORMATION >[VK45DE]
DTC P0037, P
0038, P0057, P0058 HO2S2 HEATER
Wiring Diagram
INFOID:0000000001326574
BANK 1
Specification data are reference values and are measured between each

Page 1989 of 3924

INFINITI FX35 2008 Service Manual
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-749
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
6R Heated oxygen sen

Page 1990 of 3924

INFINITI FX35 2008 Service Manual
EC-750
< SERVICE INFORMATION >[VK45DE]
DTC P0037, P
0038, P0057, P0058 HO2S2 HEATER
BANK 2
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not u

Page 1991 of 3924

INFINITI FX35 2008 Service Manual
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-751
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Diagnosis ProcedureINFOID:0000000001326575
1.CHECK GROUND CONNECTIONS
1. Turn ignit

Page 1992 of 3924

INFINITI FX35 2008 Service Manual
EC-752
< SERVICE INFORMATION >[VK45DE]
DTC P0037, P
0038, P0057, P0058 HO2S2 HEATER
2. Turn ignition switch ON.
3. Check voltage between HO2S2 terminal 2 and ground with
CONSULT-III or tester.
OK or

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