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Infiniti FX35 / FX45. Manual - part 339

TROUBLE DIAGNOSIS

EC-117

< SERVICE INFORMATION >

[VQ35DE]

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

CONSULT-III Function (ENGINE)

INFOID:0000000001325936

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

• Diagnostic trouble codes

• 1st trip diagnostic trouble codes

• Freeze frame data

• 1st trip freeze frame data

• System readiness test (SRT) codes

• Test values

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

111

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition

switch OFF

0 - 1.5V

[Ignition switch: OFF]
• More than a few seconds after turning igni-

tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

113

GY/R

Fuel pump relay

[Ignition switch: ON]
• For 1 second after turning ignition switch ON
[Engine is running]

0 - 1.5V

[Ignition switch: ON]
• More than 1 second after turning ignition

switch ON

BATTERY VOLTAGE
(11 - 14V)

115
116

B/R
B/W

ECM ground

[Engine is running]
• Idle speed

Body ground

117

R/Y

EVAP canister vent control
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

119

120

R
R/B

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

121

R/W

Power supply for ECM
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.

Self-diagnostic results

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*

Data monitor

Input/Output data in the ECM can be read.

Active test

Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts
some parameters in a specified range.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

ECU part number

ECM part number can be read.

EC-118

< SERVICE INFORMATION >

[VQ35DE]

TROUBLE DIAGNOSIS

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOSTIC

RESULTS

DATA

MONI-

TOR

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC*

FREEZE

FRAME

DATA*

SRT

STATUS

DTC

WORK

SUP-

PORT

ENGINE CONTROL COMP

T P

INPUT

Crankshaft position sensor (POS)

Camshaft position sensor (PHASE)

Mass air flow sensor

Engine coolant temperature sensor

Air fuel ratio (A/F) sensor 1

Heated oxygen sensor 2

Vehicle speed sensor

Accelerator pedal position sensor

Throttle position sensor

Fuel tank temperature sensor

EVAP control system pressure sen-
sor

Intake air temperature sensor

Knock sensor

Refrigerant pressure sensor

Closed throttle position switch (ac-
celerator pedal position sensor sig-
nal)

Air conditioner switch

Park/neutral position (PNP) switch

Stop lamp switch

Power steering pressure sensor

Battery voltage

Load signal

Fuel level sensor

ICC steering switch

ASCD steering switch

ICC brake switch

ASCD brake switch

Snow mode switch

TROUBLE DIAGNOSIS

EC-119

< SERVICE INFORMATION >

[VQ35DE]

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 “Freeze Frame Data and 1st Trip Freeze Frame Data”.

*3: Always “CMPLT” is displayed.

WORK SUPPORT MODE

Work Item

ENGINE CONTROL COMPON

T P

TPUT

Fuel injector

Power transistor (Ignition timing)

Throttle control motor relay

Throttle control motor

EVAP canister purge volume con-
trol solenoid valve

Air conditioner relay

Fuel pump relay

Cooling fan relay

Air fuel ratio (A/F) sensor 1 heater

Heated oxygen sensor 2 heater

EVAP canister vent control valve

Intake valve timing control solenoid
valve

Calculated load value

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOSTIC

RESULTS

DATA

MONI-

TOR

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC*

FREEZE

FRAME

DATA*

SRT

STATUS

DTC

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

EC-120

< SERVICE INFORMATION >

[VQ35DE]

TROUBLE DIAGNOSIS

*: 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 Information"

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 0

C (32

F).

• NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-

TEM

• FUEL TANK TEMP. IS MORE THAN 0

C (32

F).

• WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-

TEM CLOSE”

• WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”

UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
III WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-III MAY DIS-
PLAY “BATTERY VOLTAGE IS LOW. CHARGE BAT-
TERY”, 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 is 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-17

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 [

• 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 sched-

ule.

S-FUEL TRM-B2 [%]

ENGINE SPEED [rpm]

• The engine speed at the moment a malfunction is detected is displayed.

VEHICL SPEED
[km/h] or [mph]

• The vehicle speed at the moment a malfunction is detected is displayed.

ABSOL TH-P/S [%]

• The throttle operating angle at the moment a malfunction is detected is displayed.

B/FUEL SCHDL
[msec]

• The base fuel schedule at the moment a malfunction is detected is displayed.

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