Infiniti M35/M45 Y50. Manual - part 414

TROUBLE DIAGNOSIS

EC-129

[VQ35DE]

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EC

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) [%]

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.

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.

Monitored item 

[Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

EC-130

[VQ35DE]

TROUBLE DIAGNOSIS

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]

●

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

AC EVA TARGET 
[

°

C]

●

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

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.

Monitored item 

[Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

TROUBLE DIAGNOSIS

EC-131

[VQ35DE]

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EC

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 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.

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.

EC-132

[VQ35DE]

TROUBLE DIAGNOSIS

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 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 listen to operating sound.

Fuel pump relay makes the operat-
ing sound.

●

Harness and connectors

●

Fuel pump relay

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