2007 NISSAN 350Z heater

EC-118
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-III screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-119, "
Freeze Frame Data and 1st Trip Freeze Frame Data" .
*3: Always “CMPLT” is displayed.
INSPECTION PROCEDURE
Refer to GI-36, "CONSULT-III/GST CHECKING SYSTEM" .
WORK SUPPORT MODE
Work Item
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Fuel injector××
Power transistor (Ignition timing)××
Throttle control motor relay××
Throttle control motor×
EVAP canister purge volume control
solenoid valve××××
Air conditioner relay×
Fuel pump relay×××
Cooling fan relay×××
Air fuel ratio (A/F) sensor 1 heater××
×*
3
Heated oxygen sensor 2 heater××
×*3
EVAP canister vent control valve×× ××
Intake valve timing control solenoid
valve×××
Exhaust valve timing control magnet
retarder×× ××
Calculated load value×× ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*
1FREEZE
FRAME
DATA*
2
SRT STA-
TUSDTC
WORK
SUP-
PORT
WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE

FUEL PUMP WILL STOP BY TOUCHING START DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.When releasing fuel pressure
from fuel line
IDLE AIR VOL LEARN

THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume
SELF-LEARNING CONT

THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When clearing the coefficient of
self-learning control value

TROUBLE DIAGNOSIS
EC-121
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EC
Revision: 2006 November2007 350Z
TP SEN 1-B1 [V]
The throttle position sensor signal voltage is dis-
played.
THRTL SEN 2-B1 signal is converted by ECM
internally. Thus, it differs from ECM terminal
voltage signal. TP SEN 2-B1 [V]
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 indi-
cated.
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 displayed
regardless of the starter signal.
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 as determined by the air conditioner signal.
P/N POSI SW
[ON/OFF]

Indicates [ON/OFF] condition from the park/neutral
position (PNP) switch signal.
PW/ST SIGNAL [ON/
OFF]

[ON/OFF] condition of the power steering system
(determined by the signal voltage of the power steer-
ing pressure sensor) 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
switch are OFF.
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 com-
puted value is indicated.
INJ PULSE-B2 [msec]
IGN TIMING [BTDC]

Indicates the ignition timing computed by ECM
according 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·m/
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
solenoid valve control value computed by the ECM
according to the input signals.

The opening becomes larger as the value increases.
INT/V TIM(B1) [°CA]

Indicates [°CA] of intake camshaft advanced angle.
INT/V TIM(B2) [°CA]
EXH/V TIM B1 [°CA]

Indicates [°CA] of exhaust camshaft retarded angle.
EXH/V TIM B2 [°CA] Monitored item [Unit] Description Remarks

EC-122
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
INT/V SOL(B1) [%]
The control value of the intake valve timing control
solenoid valve (determined by ECM according to the
input signals) is indicated.

The advance angle becomes larger as the value
increases. INT/V SOL(B2) [%]
EX VTC DTY B1 [%]

The control value of the exhaust valve timing control
magnet retarder (determined by ECM according to the
input signals) is indicated.

The retard angle becomes larger as the value
increases. EX VTC DTY B2 [%]
TP SEN 1-B2 [V]

The throttle position sensor signal voltage is dis-
played.
THRTL SEN 2-B2 signal is converted by ECM
internally. Thus, it differs from ECM terminal
voltage signal. TP SEN 2-B2 [V]
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 control motor relay control condi-
tion determined by the ECM according to the input sig-
nals.
COOLING FAN
[HI/LOW/OFF]

The control condition of the cooling fan (determined by
ECM according to the input signals) is indicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S2 HTR (B1) [ON/
OFF]

Indicates [ON/OFF] condition of heated oxygen sensor
2 heater determined by ECM according to the input
signals. HO2S2 HTR (B2) [ON/
OFF]
I/P PULLY SPD
[rpm]

Indicates the engine speed computed from the turbine
revolution sensor signal.
VEHICLE SPEED
[km/h] or [mph]

Indicates the vehicle speed computed from the revolu-
tion sensor signal.
IDL A/V LEARN [YET/
CMPLT]

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
performed successfully.
TRVL AFTER MIL [km]
or [mile]

Distance traveled while MIL is activated.
ENG OIL TEMP [°C] or
[°F]

The engine oil temperature (determined by the signal
voltage of the engine oil temperature sensor) is dis-
played.
A/F S1 HTR(B1) [%]

Indicates A/F sensor 1 heater control value computed
by ECM according to the input signals.

The current flow to the heater becomes larger as the
value increases. A/F S1 HTR(B2) [%]
AC PRESS SEN [V]

The signal voltage from the refrigerant pressure sen-
sor is displayed. Monitored item [Unit] Description Remarks

EC-128
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
EVAP SYS PRES
Ignition switch: ON Approx. 1.8 - 4.8V
FUEL LEVEL SE

Ignition switch: ONDepending on fuel level of fuel
tank
START SIGNAL

Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG

Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW

Ignition switch: ONShift lever: P or N (A/T), Neutral (M/T)
positionON
Shift lever: Except above position OFF
PW/ST SIGNAL

Engine: After warming up, idle
the engineSteering wheel: Not being turned OFF
Steering wheel: Being turned ON
LOAD SIGNAL

Ignition switch: ONRear window defogger switch: ON and/
or lighting switch: 2nd positionON
Rear window defogger switch and light-
ing switch: OFFOFF
IGNITION SW

Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW

Engine: After warming up, idle
the engineHeater fan switch: ON ON
Heater fan switch: OFF OFF
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1
INJ PULSE-B2

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T) position

Air conditioner switch: OFF

No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T) position

Air conditioner switch: OFF

No loadIdle 6° - 16° BTDC
2,000 rpm 25° - 45° BTDC
CAL/LD VALUE

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T) position

Air conditioner switch: OFF

No loadIdle 5% - 35%
2,500 rpm 5% - 35%
MASS AIRFLOW

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T) position

Air conditioner switch: OFF

No loadIdle 2.0 - 6.0 g·m/s
2,500 rpm 7.0 - 20.0 g·m/s
PURG VOL C/V

Engine: After warming up

Shift lever: P or N (A/T), Neutral
(M/T) position

Air conditioner switch: OFF

No loadIdle
(Accelerator pedal is not depressed
even slightly, after engine starting)0%
2,000 rpm — MONITOR ITEM CONDITION SPECIFICATION

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-165
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Revision: 2006 November2007 350Z
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATERPFP:22693
DescriptionNBS000B6
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-III Reference Value in Data Monitor ModeNBS000B7
Specification data are reference values.
On Board Diagnosis LogicNBS000B8
DTC Confirmation ProcedureNBS000B9
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-III
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-170, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speedAir fuel ratio (A/F)
sensor 1 heater
controlAir fuel ratio (A/F) sensor 1 heater
Mass air flow sensor Amount of intake air
MONITOR ITEM CONDITION SPECIFICATION
A/F S1 HTR(B1)
A/F S1 HTR(B2)

Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)4 - 100%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0031
0031
(Bank 1)Air fuel ratio (A/F) sensor
1 heater control circuit
low inputThe 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 A/F sensor 1 heater.)

Harness or connectors
(The A/F sensor 1 heater circuit is
open or shorted.)

Air fuel ratio (A/F) sensor 1 heater P0051
0051
(Bank 2)
P0032
0032
(Bank 1)Air fuel ratio (A/F) sensor
1 heater control circuit
high inputThe 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 A/F sensor 1 heater.)

Harness or connectors
(The A/F sensor 1 heater circuit is
shorted.)

Air fuel ratio (A/F) sensor 1 heater P0052
0052
(Bank 2)

EC-166
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
Revision: 2006 November2007 350Z
Wiring DiagramNBS000BA
BANK 1
TBWT1617E

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-167
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Revision: 2006 November2007 350Z
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1W/RA/F sensor 1 heater
(bank 1)[Engine is running]

Warm-up condition

Idle speed
(More than 140 seconds after starting
engine)2.9 - 8.8V
57 L A/F sensor 1 (bank 1)[Ignition switch: ON]2.2V
61 R A/F sensor 1 (bank 1)[Ignition switch: ON]

Warm-up condition

Engine speed: 2,000 rpm1.8V
Output voltage varies with air
fuel ratio.
PBIB3538E

EC-168
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
Revision: 2006 November2007 350Z
BANK 2
TBWT1618E