Infiniti M35/M45 Y50. Manual - part 589

TROUBLE DIAGNOSIS

EC-829

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

*: 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-757, "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-
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-718, "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.

VEHICL SPEED
[km/h] or [mph]

●

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

EC-830

[VK45DE]

TROUBLE DIAGNOSIS

*: The items are the same as those of 1st trip freeze frame data.

DATA MONITOR MODE
Monitored Item

×

: Applicable

ABSOL TH·P/S [%]

●

The throttle valve opening 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.

INT/A TEMP SE
[

°

C] or [

°

F]

●

The intake air temperature at the moment a malfunction is detected is displayed.

Freeze frame data 

item*

Description

Monitored item 

[Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

ENG SPEED [rpm]

×

×

●

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

●

Accuracy becomes poor if engine speed 
drops below the idle rpm.

●

If the signal is interrupted while the 
engine is running, an abnormal value may 
be indicated.

MAS A/F SE-B1 [V]

×

×

●

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

●

When the engine is stopped, a certain 
value 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.

A/F ALPHA-B1 [%]

×

●

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

●

When the engine is stopped, a certain 
value is indicated.

●

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

A/F ALPHA-B2 [%]

×

COOLAN TEMP/S 
[

°

C] or [

°

F]

×

×

●

The engine coolant temperature (deter-
mined by the signal voltage of the engine 
coolant temperature sensor) is displayed.

●

When the engine coolant temperature 
sensor is open or short-circuited, ECM 
enters fail-safe mode. The engine coolant 
temperature determined by the ECM is 
displayed.

A/F SEN1 (B1) [V]

×

×

●

The A/F signal computed from the input 
signal of the air fuel ratio (A/F) sensor 1 is 
displayed.

A/F SEN1 (B2) [V]

×

HO2S2 (B1) [V]

×

●

The signal voltage of the heated oxygen 
sensor 2 is displayed.

HO2S2 (B2) [V]

×

HO2S2 MNTR (B1) 
[RICH/LEAN]

×

●

Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after 
three way catalyst is relatively small.
LEAN: means the amount of oxygen after 
three way catalyst is relatively large.

●

When the engine is stopped, a certain 
value is indicated.

HO2S2 MNTR (B2) 
[RICH/LEAN]

×

VHCL SPEED SE 
[km/h] or [mph]

×

×

●

The vehicle speed computed from the 
vehicle speed signal sent from combina-
tion meter is displayed.

BATTERY VOLT 
[V]

×

×

●

The power supply voltage of ECM is dis-
played.

ACCEL SEN 1 [V]

×

×

●

The accelerator pedal position sensor 
signal voltage is displayed.

●

ACCEL SEN 2 signal is converted be 
ECM internally. Thus, it differs from ECM 
terminal voltage signal.

ACCEL SEN 2 [V]

×

TROUBLE DIAGNOSIS

EC-831

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

THRTL SEN 1 [V]

×

×

●

The throttle position sensor signal voltage 
is displayed.

●

THRTL SEN 2 signal is converted by 
ECM internally. Thus, it 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-

NALS

MAIN 

SIG-

NALS

Description

Remarks

EC-832

[VK45DE]

TROUBLE DIAGNOSIS

MASS AIRFLOW 
[g·m/s]

●

Indicates the mass air flow computed by 
ECM according to the signal voltage of 
the mass air flow sensor.

PURG VOL C/V 
[%]

●

Indicates the EVAP canister purge vol-
ume control solenoid valve control value 
computed by the ECM according to the 
input signals.

●

The opening becomes larger as the value 
increases.

INT/V TIM (B1) 
[

°

CA]

●

Indicates [

°

CA] of intake camshaft 

advanced angle. 

INT/V TIM (B2) 
[

°

CA]

INT/V SOL (B1) [%]

●

The control value of the intake valve tim-
ing control solenoid valve (determined by 
ECM according to the input signals) is 
indicated.

●

The advance angle becomes larger as 
the value increases.

INT/V SOL (B2) [%]

VIAS S/V
[ON/OFF]

●

The control condition of the VIAS control 
solenoid valve (determined by ECM 
according to the input signals) is indi-
cated.

●

OFF: VIAS control solenoid valve is not 
operating.
ON: VIAS control solenoid valve is oper-
ating.

AIR COND RLY 
[ON/OFF]

×

●

The air conditioner relay control condition 
(determined by ECM according to the 
input signals) is indicated.

FUEL PUMP RLY 
[ON/OFF]

×

●

Indicates the fuel pump relay control con-
dition determined by ECM according to 
the input signals.

FPCM [HI/LOW]

×

●

The control condition of the fuel pump 
control module (FPCM) (determined by 
the ECM according to the input signal) is 
indicated.

VENT CONT/V 
[ON/OFF]

●

The control condition of the EVAP canis-
ter vent control valve (determined by 
ECM according to the input signals) is 
indicated.
ON: Closed
OFF: Open

THRTL RELAY 
[ON/OFF]

×

●

Indicates the throttle control motor relay 
control condition determined by the ECM 
according to the input signals.

HO2S2 HTR (B1) 
[ON/OFF]

●

Indicates [ON/OFF] condition of heated 
oxygen sensor 2 heater determined by 
ECM according to the input signals.

HO2S2 HTR (B2) 
[ON/OFF]

I/P PULLY SPD
[rpm]

●

Indicates the engine speed computed 
from the turbine revolution sensor signal.

Monitored item 

[Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks