2006 INFINITI M35 fuel pressure

EC-114
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
: Vehicle front
1. Mass air flow sensor (With intake air
temperature sensor)2. Electric throttle control actuator 3. Cooling fan motor-2 harness con-
nector
4. Cooling fan motor-1 harness con-
nector5. Cooling fan control module 6. Refrigerant pressure sensor har-
ness connector
7. PCV valve 8. Engine coolant temperature sensor
harness connector9. Fuel dumper
PBIB2787E

EC-120
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
: Vehicle front
1. Fuel level sensor unit and fuel pump
harness connector2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
4. Fuel tank temperature sensor 5. FPCM 6. Dropping resistor
PBIB2681E

EC-128
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
33 LGCamshaft position sensor
(PHASE) (bank 1)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle1.0 - 4.0V
[Engine is running]
Engine speed is 2,000 rpm1.0 - 4.0V
34 Y/GIntake air temperature sen-
sor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
38 G/RFuel pump control module
(FPCM) check[When cranking engine]Approximately 0V
[Engine is running]
Warm-up condition
Idle speed4 - 6V
39 B/RFuel pump control module
(FPCM)[When cranking engine]0 - 0.5V
[Engine is running]
Warm-up condition
Idle speed8 - 12V
45 VEVAP canister purge vol-
ume control solenoid valve[Engine is running]
Idle speed
Accelerator pedal: Not depressed even
slightly, after engine startingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)BATTERY VOLTAGE
(11 - 14V)
47 LSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
48 L/BSensor power supply
(EVAP control system pres-
sure sensor)[Ignition switch: ON]Approximately 5V
49 B/YSensor power supply
(Refrigerant pressure sen-
sor, Battery current sensor)[Ignition switch: ON]Approximately 5V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB1039E
PBIB1040E
SEC990C
SEC991C

EC-134
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOS-
TIC RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT
STATUSDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)
Camshaft position sensor
(PHASE)
Mass air flow sensor
Engine coolant temperature sen-
sor
Air fuel ratio (A/F) sensor 1
Heated oxygen sensor 2
Wheel sensor
Accelerator pedal position sensor
Throttle position sensor
Fuel tank temperature sensor
EVAP control system pressure
sensor
Intake air temperature sensor
Knock sensor
Refrigerant pressure sensor
Closed throttle position switch
(accelerator pedal position sensor
signal)
Air conditioner switch
Park/neutral position (PNP) switch
Stop lamp switch
Power steering pressure sensor
Battery voltage
Load signal
Fuel level sensor
Battery current sensor
ICC steering switch
ASCD steering switch
ICC brake switch
ASCD brake switch

EC-136
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ENGINE”.
If “ENGINE” is not indicated, go to GI-40, "
CONSULT-II Data
Link Connector (DLC) Circuit" .
6. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual.
WORK SUPPORT MODE
Work Item
BCIA0029E
BCIA0030E
BCIA0031E
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-137
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Revision: 2006 January2006 M35/M45
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to EC-55, "EMISSION-RELATED DIAGNOSTIC INFORMA-
TION ITEMS" .)
Freeze Frame Data and 1st Trip Freeze Frame Data
EVAP SYSTEM CLOSE CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.
IGN SW ON
ENGINE NOT RUNNING
AMBIENT TEMPERATURE IS ABOVE 0C (32F).
NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM
FUEL TANK TEMP. IS MORE THAN 0C (32F).
WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”
WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
II WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN IN USING CHARGED BATTERY.When detecting EVAP vapor leak
point of EVAP system
VIN REGISTRATION
IN THIS MODE VIN IS REGISTERED IN ECM When registering VIN in ECM
TARGET IDLE RPM ADJ*
IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ*
IDLE CONDITION When adjusting target ignition tim-
ing WORK ITEM CONDITION USAGE
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX]
The engine control component part/control system has a trouble code, it is displayed as PXXXX. (Refer to
EC-55, "
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS" .)
FUEL SYS-B1
“Fuel injection system status” at the moment a malfunction is detected is displayed.
One mode in the following is displayed.
Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop FUEL SYS-B2
CAL/LD VALUE [%]
The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [
C]
or [
F]The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]
“Long-term fuel trim” at the moment a malfunction is detected is displayed.
The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim. L-FUEL TRM-B2 [%]
S-FUEL TRM-B1 [%]
“Short-term fuel trim” at the moment a malfunction is detected is displayed.
The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule. S-FUEL TRM-B2 [%]
ENGINE SPEED
[rpm]
The engine speed at the moment a malfunction is detected is displayed.

TROUBLE DIAGNOSIS
EC-139
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Revision: 2006 January2006 M35/M45THRTL SEN 1 [V]The throttle position sensor signal voltage
is displayed.THRTL SEN 2 signal is converted by
ECM internally. Thus, they differs from
ECM terminal voltage signal. THRTL SEN 2 [V]
FUEL T/TMP SE
[
C] or [F]
The fuel temperature (determined by the
signal voltage of the fuel tank tempera-
ture sensor) is displayed.
INT/A TEMP SE
[
C] or [F]
The intake air temperature (determined
by the signal voltage of the intake air tem-
perature sensor) is indicated.
EVAP SYS PRES
[V]
The signal voltage of EVAP control sys-
tem pressure sensor is displayed.
FPCM DR VOLT
[V]
The voltage between fuel pump and
FPCM 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 volt-
age.
After starting the engine, [OFF] is dis-
played regardless of the starter signal.
CLSD THL POS
[ON/OFF]
Indicates idle position [ON/OFF] com-
puted by ECM according to the accelera-
tor pedal position sensor signal.
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 steering pressure sensor
signal) is indicated.
LOAD SIGNAL
[ON/OFF]
Indicates [ON/OFF] condition from the
electrical load signal.
ON: Rear window defogger switch is ON
and/or lighting 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 igni-
tion switch signal.
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 compensated by ECM according to
the input signals.When the engine is stopped, a certain
computed 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 current air flow divided by
peak air flow. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSDescription Remarks

TROUBLE DIAGNOSIS
EC-141
[VQ35DE]
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Revision: 2006 January2006 M35/M45TRVL AFTER MIL
[km] or [mile]Distance traveled while MIL is activated.
A/F S1 HTR (B1)
[%]
Air fuel ratio (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 sensor is displayed.
VHCL SPEED SE
[km/h] or [mph]
The vehicle speed computed from the
vehicle speed signal sent from combina-
tion meter is displayed.
SET VHCL SPD
[km/h] or [mph]
The preset vehicle speed is displayed.
MAIN SW
[ON/OFF]
Indicates [ON/OFF] condition from MAIN
switch signal.
CANCEL SW
[ON/OFF]
Indicates [ON/OFF] condition from CAN-
CEL switch signal.
RESUME/ACC SW
[ON/OFF]
Indicates [ON/OFF] condition from
RESUME/ACCELERATE switch signal.
SET SW
[ON/OFF]
Indicates [ON/OFF] condition from SET/
COAST switch signal.
BRAKE SW1
[ON/OFF]
Indicates [ON/OFF] condition from ASCD
brake switch signal.
BRAKE SW2
[ON/OFF]
Indicates [ON/OFF] condition of stop
lamp switch signal.
DIST SW
[ON/OFF]
Indicates [ON/OFF] condition from DIS-
TANCE switch signal.
CRUISE LAMP
[ON/OFF]
Indicates [ON/OFF] condition of CRUISE
lamp determined by the ECM according
to the input signals.
SET LAMP
[ON/OFF]
Indicates [ON/OFF] condition of SET
lamp determined by the ECM according
to the input signals.
FAN D UTY
Indicates a command value for cooling
fan. The value is calculated by ECM
based on input signals.
AC EVA TEMP
Indicates A/C evaporator temperature
sent from “unified meter and A/C amp.”.
AC EVA TARGET
Indicates target A/C evaporator tempera-
ture sent from “unified meter and A/C
amp.”.
ALTDUTY [%]
Indicates the duty ratio of the power gen-
eration command value. The ratio is cal-
culated by ECM based on the battery
current sensor signal.
BAT CUR SEN
[mV]
The signal voltage of battery current sen-
sor is displayed. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSDescription Remarks