Infiniti Q45. Manual - part 369

TROUBLE DIAGNOSIS

EC-115

C

D

E

F

G

H

I

J

K

L

M

A

EC

CONSULT-II Function (ENGINE)

NBS001R8

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

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the 
indications on the CONSULT-II 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.

Data monitor (SPEC)

Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the 
other data monitor items can be read.

CAN diagnostic support 
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Active test

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

DTC & SRT confirmation

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

Function test

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

ECM part number

ECM part number can be read.

EC-116

TROUBLE DIAGNOSIS

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK 

SUP-

PORT

SELF-DIAGNOSTIC 

RESULTS

DATA 

MONI-

TOR

DATA 

MONI-

TOR 

(SPEC)

ACTIVE 

TEST

DTC & SRT

CONFIRMATION

DTC*1

FREEZE 

FRAME 
DATA*2

SRT 

STATUS

DTC 

WORK 

SUP-

PORT

ENGINE CONTROL 

COM

P

ONENT

 P

ARTS

IN

P

U

T

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

×

×

×

×

×

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

×

×

Intake valve timing control position 
sensor

×

×

×

Fuel level sensor

×

×

×

ICC steering switch

×

×

×

ASCD steering switch

×

×

×

ICC brake switch

×

×

×

ASCD brake switch

×

×

×

TROUBLE DIAGNOSIS

EC-117

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D

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EC

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-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to 

EC-118

 .

*3: Always “CMPLT” is displayed.

INSPECTION PROCEDURE

Refer to 

GI-36, "CONSULT-II Start Procedure"

 .

WORK SUPPORT MODE
Work Item

ENGI

NE CONTROL CO

MPONENT P

ARTS

OUTPUT

Fuel injector

×

×

×

Power transistor (Ignition timing)

×

×

×

Throttle control motor relay

×

×

×

Throttle control motor

×

EVAP canister purge volume con-
trol solenoid valve

×

×

×

×

×

FPCM

×

×

×

×

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

×

×

×

×

×

Vacuum cut valve bypass valve

×

×

×

×

×

×

Intake valve timing control solenoid 
valve

×

×

×

×

VIAS control solenoid valve

×

×

×

×

Calculated load value

×

×

×

Item

DIAGNOSTIC TEST MODE

WORK 

SUP-

PORT

SELF-DIAGNOSTIC 

RESULTS

DATA 

MONI-

TOR

DATA 

MONI-

TOR 

(SPEC)

ACTIVE 

TEST

DTC & SRT

CONFIRMATION

DTC*1

FREEZE 

FRAME 
DATA*2

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-118

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-48, "EMISSION-RELATED DIAGNOSTIC INFORMA-

TION ITEMS"

 .

Freeze Frame Data and 1st Trip Freeze Frame Data

EVAP SYSTEM CLOSE

OPEN THE VACUUM CUT VALVE BYPASS VALVE AND 
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

●

TANK FUEL 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-
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 IGNITION TIMING 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-9, "INDEX FOR DTC"

 .)

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.