Infiniti M35/M45 Y50. Manual — part 588

TROUBLE DIAGNOSIS

EC-825

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

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

*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to

SC-5, "SPECIFIC GRAVITY CHECK"

.

102

G

PNP switch

[Ignition switch: ON]

●

Selector lever: P or N

Approximately 0V

[Ignition switch: ON]

●

Selector lever: Except above

BATTERY VOLTAGE
(11 - 14V)

104

O

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

106

LG

Accelerator pedal position
sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully released

0.4 - 1.1V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully depressed

3.7 - 4.8V

107

V/W

Fuel tank temperature sen-
sor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.

108

BR

ICC brake switch (models
witch ICC system)
ASCD brake switch (models
witch ASCD system)

[Ignition switch: ON]

●

Brake pedal: Slightly depressed

Approximately 0V

[Ignition switch: ON]

●

Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14V)

109

L

Ignition switch

[Ignition switch: OFF]

0V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

111

SB

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

GR

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
B

ECM ground

[Engine is running]

●

Idle speed

Body ground

117

GR/L

EVAP canister vent control
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

119

120

R
R

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

121

L

Power supply for ECM
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-826

[VK45DE]

TROUBLE DIAGNOSIS

CONSULT-II Function (ENGINE)

NBS005AN

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.

TROUBLE DIAGNOSIS

EC-827

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOS-

TIC 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

COMPONENT P

ARTS

IN

P

U

T

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

×

×

Intake valve timing control position
sensor

×

×

×

Fuel level sensor

×

×

×

Battery current sensor

×

×

×

ICC steering switch

×

×

×

ASCD steering switch

×

×

×

ICC brake switch

×

×

×

ASCD brake switch

×

×

×

EC-828

[VK45DE]

TROUBLE DIAGNOSIS

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-762, "FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME

DATA"

.

*3: Always “CMPLT” is displayed.

INSPECTION PROCEDURE

Refer to

GI-38, "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 control module

×

×

×

×

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

×

×

×

×

VIAS control solenoid valve

×

×

×

×

Alternator

×

×

×

Calculated load value

×

×

×

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOS-

TIC 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