2007 NISSAN 350Z sensor

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-171
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Revision: 2006 November2007 350Z
2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check voltage between air fuel ratio sensor (A/F) sensor 1 ter-
minal 4 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E12, F3

15A fuse

Harness for open or short between air fuel ratio (A/F) sensor 1 and fuse
>> Repair or replace harness or connectors.
4. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 (bank 1) or 5 (bank 2) and air fuel ratio (A/F) sensor 1
terminal 3.
Refer to Wiring Diagram.
4. Also check harness for short to ground or short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
1. A/F sensor 1 (bank 1) harness con-
nector2. A/F sensor 1 (bank 2) harness con-
nector
:Ve h ic le f o rn t
Voltage: Battery voltage
PBIB3516E
PBIB3308E
Continuity should exist.

EC-172
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
Revision: 2006 November2007 350Z
5. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to EC-172, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning air fuel ratio (A/F) sensor 1.
6. CHECK INTERMITTENT INCIDENT
Perform EC-141, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS000BC
AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Check resistance between terminals 3 and 4.
Check continuity between terminals 3 and 1, 2, terminals 4 and 1, 2.
If NG, replace the air fuel ratio (A/F) sensor 1.
CAUTION:

Discard any A/F 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 A/F sensor, clean exhaust system
threads using Heated Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Removal and Installation NBS000BD
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST" . Resistance: 1.8 - 2.44Ω [at 25°C (77°F)]
Continuity should not exist.
PBIB3309E

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-173
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Revision: 2006 November2007 350Z
DTC P0037, P0038, P0057, P0058 HO2S2 HEATERPFP:226A0
DescriptionNBS0004J
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 (HO2S2) heater corresponding to the
engine speed, amount of intake air and engine coolant temperature.
OPERATION
CONSULT-III Reference Value in Data Monitor ModeNBS0004K
Specification data are reference values.
On Board Diagnosis LogicNBS0004L
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Engine speed
Heated oxygen sensor 2
(HO2S2) heater controlHeated oxygen sensor 2
(HO2S2) 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)
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 loadON

Engine speed: Above 3,600 rpm OFF
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0037
0037
(Bank 1)
HO2S2 heater
control circuit lowThe current amperage in the HO2S2 heater cir-
cuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the HO2S2 heater.)

Harness or connectors
(The HO2S2 heater circuit is open or
shorted.)

HO2S2 heater P0057
0057
(Bank 2)
P0038
0038
(Bank 1)
HO2S2 heater
control circuit highThe current amperage in the HO2S2 heater cir-
cuit is out of the normal range.
(An excessively high voltage signal is sent to
ECM through the HO2S2 heater.)

Harness or connectors
(The HO2S2 heater circuit is shorted.)

HO2S2 heater P0058
0058
(Bank 2)

EC-176
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2006 November2007 350Z
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
17 PHeated oxygen sensor 2
heater (bank 1)[Engine is running]

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.0 - 14V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
76 W/RHeated oxygen sensor 2
(bank 1)[Engine is running]

Revving engine from idle to 3,000 rpm
quickly 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 - 1.0V
84 GSensor ground
(Heated oxygen sensor 2,
Engine coolant temperature
sensor, Engine oil tempera-
ture sensor)[Engine is running]

Warm-up condition

Idle speed0V
PBIB3545E

EC-178
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2006 November2007 350Z
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
33 PU/WHeated oxygen sensor 2
heater (bank 2)[Engine is running]

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.0 - 14V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
80 R/YHeated oxygen sensor 2
(bank 2)[Engine is running]

Revving engine from idle to 3,000 rpm
quickly 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 - 1.0V
84 GSensor ground
Heated oxygen sensor 2,
Engine coolant temperature
sensor, Engine oil tempera-
ture sensor)[Engine is running]

Warm-up condition

Idle speed0V
PBIB3545E

EC-180
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2006 November2007 350Z
2. CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Disconnect heated oxygen sensor 2 harness connector.
2. Turn ignition switch ON.
3. Check voltage between HO2S2 terminal 2 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E12, F3

15A fuse

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.
1. Heated oxygen sensor 2 (bank 2) 2. Heated oxygen sensor 2 (bank 2)
harness connector3. Heated oxygen sensor 2 (bank 1)
4. Heated oxygen sensor 2 (bank 1)
harness connector
:Vehicle front
Voltage: Battery voltage
PBIB3502E
MBIB0186E

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-181
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EC
Revision: 2006 November2007 350Z
4. CHECK HO2S2 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> 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-181, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 2.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-141, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS0004P
HEATED OXYGEN SENSOR 2 HEATER
1. Check resistance between HO2S2 terminals as follows.
2. If NG, replace heated oxygen sensor 2.
CAUTION:

Discard any heated oxygen sensor which has been dropped
from a height of more than 0.5 m (19.7 in) onto a hard sur-
face such as a concrete floor; use a new one.

Before installing new oxygen sensor, clean exhaust system
threads using Oxygen Sensor Thread Cleaner tool J-43897-
18 or J-43897-12 and approved anti-seize lubricant.
DTCTe r m i n a l s
Bank
ECM Sensor
P0037, P0038 17 3 1
P0057, P0058 33 3 2
Continuity should exist.
Terminal No. Resistance
2 and 3 3.4 - 4.4 Ω [at 25°C (77°F)]
1 and 2, 3, 4
∞ Ω
(Continuity should not exist)
4 and 1, 2, 3
PBIB3310E

EC-182
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2006 November2007 350Z
Removal and InstallationNBS0004Q
HEATED OXYGEN SENSOR 2
Refer to EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .