2007 NISSAN 350Z Engine Control Workshop Manual

TROUBLE DIAGNOSIS
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Revision: 2006 November2007 350Z
INT/V TIM(B1)
INT/V TIM(B2)

Engine: After warming up

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

Air conditioner switch: OFF

No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 30°CA
EXH/V TIM B1
EXH/V TIM B2

Engine: After warming up

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

Air conditioner switch: OFF

No loadIdle−5° - 5°CA
Around 2,500 rpm while the engine
speed is risingApprox. 0° - 30°CA
INT/V SOL(B1)
INT/V SOL(B2)

Engine: After warming up

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

Air conditioner switch: OFF

No loadIdle 0% - 2%
2,000 rpm Approx. 0% - 50%
EX VTC DTY B1
EX VTC DTY B2

Engine: After warming up

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

Air conditioner switch: OFF

No loadIdle 0% - 2%
Around 2,500 rpm while the engine
speed is risingApprox. 0% - 70%
TP SEN 1-B2
TP SEN 2-B2*
1

Ignition switch: ON
(Engine stopped)

Shift lever: D (A/T) or 1st (M/T)
positionAccelerator pedal: Fully released More than 0.36V
Accelerator pedal: Fully depressed Less than 4.75V
AIR COND RLY

Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF
VENT CONT/V

Ignition switch: ON OFF
THRTL RELAY

Ignition switch: ON ON
COOLING FAN

Engine: After warming up, idle
the engine

Air conditioner switch: OFFEngine coolant temperature is 97°C
(206°F) or lessOFF
Engine coolant temperature is between
98°C (208°F) and 99°C (210°F)LOW
Engine coolant temperature is 100°C
(212°F) or moreHI
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
I/P PULLY SPD

Vehicle speed: More than 20 km/h (12 MPH)Almost the same speed as the
tachometer indication
VEHICLE SPEED

Turn drive wheels and compare CONSULT-III value with the speedometer
indication.Almost the same speed as the
speedometer indication MONITOR ITEM CONDITION SPECIFICATION

EC-130
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
IDL A/V LEARN
Engine: RunningIdle air volume learning has not been
performed yet.YET
Idle air volume learning has already
been performed successfully.CMPLT
ENG OIL TEMP

Engine: After warming up More than 70°C (158°F)
TRVL AFTER MIL

Ignition switch: ONVehicle has traveled after MIL has
turned ON.0 - 65,535 km
(0 - 40,723 mile)
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%
AC PRESS SEN

Engine: Idle

Both A/C switch and blower switch are ON.
(Compressor operates.)1.0 - 4.0V
VHCL SPEED SE

Turn drive wheels and compare CONSULT-III value with the speedometer
indication.Almost the same speed as the
speedometer indication
SET VHCL SPD

Engine: Running ASCD: OperatingThe preset vehicle speed is
displayed.
MAIN SW

Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW

Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW

Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch:
ReleasedOFF
SET SW

Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
BRAKE SW1
(ASCD brake switch)

Ignition switch: ON

Brake pedal: Fully released (A/T)

Brake pedal and clutch pedal: Fully
released (M/T)ON

Brake pedal: Slightly depressed (A/T)

Brake pedal and/or clutch pedal:
Slightly depressed (M/T)OFF
BRAKE SW2
(Stop lamp switch)

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
VHCL SPD CUT

Ignition switch: ON NON
LO SPEED CUT

Ignition switch: ON NON
AT OD MONITOR

Ignition switch: ON OFF
AT OD CANSEL

Ignition switch: ON OFF
CRUISE LAMP

Ignition switch: ONMAIN switch: Pressed at the 1st time →
at the 2nd timeON → OFF
SET LAMP

MAIN switch: ON

When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89MPH)ASCD: Operating ON
ASCD: Not operating OFF
EXH V/T LEARN

Engine: RunningExhaust Valve Timing Control Learning
has not been performed yet.YET
Exhaust Valve Timing Control Learning
has not been performed yet.CMPLT
A/F ADJ B1

Engine: Running –0.330 - 0.330
A/F ADJ B2

Engine: Running –0.330 - 0.330 MONITOR ITEM CONDITION SPECIFICATION

TROUBLE DIAGNOSIS
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Revision: 2006 November2007 350Z
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.

EC-132
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 November2007 350Z
TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionNBS0003R
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” in “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
in “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the
value in “SPEC” in “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have
one or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

MAS A/F SE-B1/B2 (The signal voltage of the mass air flow sensor)
Testing ConditionNBS0003S

Vehicle driven distance: More than 5,000 km (3,107 miles)

Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2 , 14.25 - 15.12 psi)

Atmospheric temperature: 20 - 30°C (68 - 86°F)

Engine coolant temperature: 75 - 95°C (167 - 203°F)

Transmission: Warmed-up
–For A/T models: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF
TEMP 1” (A/T fluid temperature sensor signal) indicates more than 60°C (140°F).
–For M/T models: After the engine is warmed up to normal operating temperature, drive vehicle for 5 min-
utes.

Electrical load: Not applied
–Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

Engine speed: Idle
Inspection ProcedureNBS0003T
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform EC-71, "
Basic Inspection" .
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”, “MAS A/F SE-B1” and “MAS A/F SE-B2” in
“SPEC” of ”DATA MONITOR” mode with CONSULT-III.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-133, "
Diagnostic Procedure" .

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-133
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Diagnostic ProcedureNBS0003U
OVERALL SEQUENCE
PBIB2268E

EC-134
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 November2007 350Z
PBIB3531E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-135
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DETAILED PROCEDURE
1. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-132, "
Testing Condition" .
3. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” in mode, and make sure that the each indication is
within the SP value.
NOTE:
Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1 minute because they may fluctuate. It is NG
if the indication is out of the SP value even a little.
OK or NG
OK >> GO TO 17.
NG (Less than the SP value)>>GO TO 2.
NG (More than the SP value)>>GO TO 3.
2. CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of "DATA MONITOR" mode, and make sure that the indication is within the
SP value.
OK or NG
OK >> GO TO 4.
NG (More than the SP value)>>GO TO 19.
3. CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of "DATA MONITOR" mode, and make sure that the indication is within the
SP value.
OK or NG
OK >> GO TO 6.
NG (More than the SP value)>>GO TO 6.
NG (Less than the SP value)>>GO TO 25.
4. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Stop the engine.
2. Disconnect PCV hose, and then plug it.
3. Start engine.
4. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of "DATA MONITOR" mode, and make sure that the
each indication is within the SP value.
OK or NG
OK >> GO TO 5.
NG >> GO TO 6.
5. CHANGE ENGINE OIL
1. Stop the engine.
2. Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
dition.
>>INSPECTION END

EC-136
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 November2007 350Z
6. CHECK FUEL PRESSURE
Check fuel pressure. (Refer to EC-79, "
Fuel Pressure Check" .)
OK or NG
OK >> GO TO 9.
NG (Fuel pressure is too high)>>Replace fuel pressure regulator, refer to EC-79, "
Fuel Pressure Check" .
GO TO 8.
NG (Fuel pressure is too low)>>GO TO 7.
7. DETECT MALFUNCTIONING PART
1. Check the following.
–Clogged and bent fuel hose and fuel tube
–Clogged fuel filter
–Fuel pump and its circuit (Refer to EC-691, "FUEL PUMP" .)
2. If NG, repair or replace the malfunctioning part. (Refer to EC-79, "
Fuel Pressure Check" .)
If OK, replace fuel pressure regulator.
>> GO TO 8.
8. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of "DATA MONITOR" mode, and make sure that the
each indication is within the SP value.
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9. PERFORM POWER BALANCE TEST
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Make sure that the each cylinder produces a momentary engine speed drop.
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
1. Check the following.
–Ignition coil and its circuit (Refer to EC-698, "IGNITION SIGNAL" .)
–Fuel injector and its circuit (Refer to EC-686, "FUEL INJECTOR" .)
–Intake air leakage
–Low compression pressure (Refer to EM-89, "CHECKING COMPRESSION PRESSURE" .)
2. If NG, repair or replace the malfunctioning part.
If OK, replace fuel injector. (It may be caused by leakage from fuel injector or clogging.)
>> GO TO 11.