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Infiniti M35/M45 Y50. Manual - part 590

TROUBLE DIAGNOSIS

EC-833

[VK45DE]

VEHICLE SPEED
[km/h] or [MPH]

●

The vehicle speed computed from the
vehicle speed signal sent from TCM is
displayed.

IDL A/V LEARN
[YET/CMPLT]

●

Display the condition of idle air volume
learning
YET: Idle air volume learning has not
been performed yet.
CMPLT: Idle air volume learning has
already been performed successfully.

TRVL 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 DUTY
[%]

●

Indicates a command value for cooling
fan. The value is calculated by ECM
based on input signals.

AC EVA TEMP
[

C] or [

●

Indicates A/C evaporator temperature
sent from “unified meter and A/C amp.”.

AC EVA TARGET
[

C] or [

●

Indicates target A/C evaporator tempera-
ture sent from “unified meter and A/C
amp.”.

Monitored item

[Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

EC-834

[VK45DE]

TROUBLE DIAGNOSIS

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

DATA MONITOR (SPEC) MODE
Monitored Item

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ALT DUTY [%]

●

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.

ALT DUTY SIG
[ON/OFF]

●

The control condition of the power gener-
ation voltage variable control (determined
by ECM according to the input signals) is
indicated.
ON: Power generation voltage variable
control is active.
OFF: Power generation voltage variable
control is inactive.

A/F ADJ-B1

●

Indicates the correction factor stored in
ECM. The factor is calculated from the
difference between the target air/fuel ratio
stored in ECM and the air-fuel ratio calcu-
lated from air fuel ratio (A/F) sensor 1 sig-
nal.

A/F ADJ-B2

Voltage [V]

●

Voltage, frequency, duty cycle or pulse
width measured by the probe.

●

Only “#” is displayed if item is unable to
be measured.

●

Figures with “#”s are temporary ones.
They are the same figures as an actual
piece of data which was just previously
measured.

Frequency [msec],
[Hz] or [%]

DUTY-HI

DUTY-LOW

PLS WIDTH-HI

PLS WIDTH-LOW

Monitored item

[Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

Monitored item [Unit]

ECM
input

signals

Main

signals

Description

Remarks

ENG SPEED [rpm]

●

Indicates the engine speed computed
from the signal of the crankshaft position
sensor (POS) and camshaft position
sensor (PHASE).

MAS A/F SE-B1 [V]

●

The signal voltage of the mass air flow
sensor specification is displayed.

●

When engine is running specification
range is indicated.

B/FUEL SCHDL
[msec]

●

“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.

●

When engine is running specification
range is indicated.

A/F ALPHA-B1 [%]
A/F ALPHA-B2 [%]

●

The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.

●

When engine is running specification
range is indicated.

●

This data also includes the data for the
air-fuel ratio learning control.

TROUBLE DIAGNOSIS

EC-835

[VK45DE]

ACTIVE TEST MODE
Test Item

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

●

Engine: Return to the original
trouble condition

●

Change the amount of fuel injec-
tion using CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Fuel injector

●

Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

●

Engine: Return to the original
trouble condition

●

Timing light: Set

●

Retard the ignition timing using
CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Perform Idle Air Volume Learning.

POWER BAL-
ANCE

●

Engine: After warming up, idle
the engine.

●

A/C switch OFF

●

Selector lever: P or N

●

Cut off each fuel injector signal
one at a time using CONSULT-II.

Engine runs rough or dies.

●

Harness and connectors

●

Compression

●

Fuel injector

●

Power transistor

●

Spark plug

●

Ignition coil

ENG COOLANT
TEMP

●

Engine: Return to the original
trouble condition

●

Change the engine coolant tem-
perature using CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Engine coolant temperature sen-
sor

●

Fuel injector

FUEL PUMP
RELAY

●

Ignition switch: ON (Engine
stopped)

●

Turn the fuel pump relay ON and
OFF using CONSULT-II and lis-
ten to operating sound.

Fuel pump relay makes the operat-
ing sound.

●

Harness and connectors

●

Fuel pump relay

VIAS SOL VALVE

●

Ignition switch: ON

●

Turn solenoid valve ON and OFF
with CONSULT-II and listen to
operating sound.

Solenoid valve makes an operating
sound.

●

Harness and connectors

●

Solenoid valve

PURG VOL
CONT/V

●

Engine: After warming up, run
engine at 1,500 rpm.

●

Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.

Engine speed changes according to
the opening percent.

●

Harness and connectors

●

Solenoid valve

FUEL/T TEMP
SEN

●

Change the fuel tank temperature using CONSULT-II.

VENT CON-
TROL/V

●

Ignition switch: ON (Engine
stopped)

●

Turn solenoid valve ON and OFF
with the CONSULT-II and listen
to operating sound.

Solenoid valve makes an operating
sound.

●

Harness and connectors

●

Solenoid valve

FPCM

●

Engine: Returns to the original
trouble condition

●

Select “LOW” and “HI” with CON-
SULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

FPCM

V/T ASSIGN
ANGLE

●

Engine: Return to the original
trouble condition

●

Change intake valve timing using
CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Intake valve timing control sole-
noid valve

EC-836

[VK45DE]

TROUBLE DIAGNOSIS

*: Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE
SRT STATUS Mode

For details, refer to

EC-762, "SYSTEM READINESS TEST (SRT) CODE"

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC WORK SUPPORT Mode

*: DTC P1442 and P1456 does not apply to Y50 models but appears in DTC Work Support Mode screens.

FAN DUTY CON-
TROL*

●

Ignition switch: ON

●

Change duty ratio using CON-
SULT-II.

Cooling fan speed changes.

●

Harness and connectors

●

Cooling fan motor

●

Cooling fan relay

●

Cooling fan control module

●

IPDM E/R

ALTERNATOR
DUTY

●

Engine: Idle

●

Change duty ratio using CON-
SULT-II.

Battery voltage changes.

●

Harness and connectors

●

IPDM E/R

●

Alternator

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE SYSTEM

EVP SML LEAK P0442/P1442*

P0442

EC-1100

P0455

EC-1153

EVP V/S LEAK P0456/P1456*

P0456

EC-1160

PURG VOL CN/V P1444

P0443

EC-1108

PURG FLOW P0441

P0441

EC-1095

A/F SEN1

A/F SEN1 (B1) P1278/P1279

P0133

EC-975

A/F SEN1 (B1) P1276

P0130

EC-947

A/F SEN1 (B2) P1288/P1289

P0153

EC-975

A/F SEN1 (B2) P1286

P0150

EC-947

HO2S2

HO2S2 (B1) P1146

P0138

EC-998

HO2S2 (B1) P1147

P0137

EC-987

HO2S2 (B1) P0139

P0139

EC-1011

HO2S2 (B2) P1166

P0158

EC-998

HO2S2 (B2) P1167

P0157

EC-987

HO2S2 (B2) P0159

P0159

EC-1011

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