Infiniti M35/M45 Y50. Manual - part 412

TROUBLE DIAGNOSIS

EC-121

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

98

R

Accelerator pedal position 
sensor 2

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully released

0.20 - 0.55V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully depressed

1.85 - 2.40V

99

Y

ICC steering switch
(models with ICC system)

[Ignition switch: ON]

●

ICC steering switch: OFF

Approximately 4.3V

[Ignition switch: ON]

●

MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

●

CANCEL switch: Pressed

Approximately 1.3V

[Ignition switch: ON]

●

RESUME/ACCELERATE switch: Pressed

Approximately 3.7V

[Ignition switch: ON]

●

SET/COAST switch: Pressed

Approximately 3V

[Ignition switch: ON]

●

DISTANCE switch: Pressed

Approximately 2.2V

99

Y

ASCD steering switch
(models with ASCD system)

[Ignition switch: ON]

●

ASCD steering switch: OFF

Approximately 4V

[Ignition switch: ON]

●

MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

●

CANCEL switch: Pressed

Approximately 1V

[Ignition switch: ON]

●

RESUME/ACCELERATE switch: Pressed

Approximately 3V

[Ignition switch: ON]

●

SET/COAST switch: Pressed

Approximately 2V

101

V/R

Stop lamp switch

[Ignition switch: OFF]

●

Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]

●

Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

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

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-122

[VQ35DE]

TROUBLE DIAGNOSIS

: 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"

 .

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 
with ICC system)
ASCD brake switch (models 
with 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)

TROUBLE DIAGNOSIS

EC-123

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

CONSULT-II Function (ENGINE)

NBS004T7

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-124

[VQ35DE]

TROUBLE DIAGNOSIS

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 CO

NTROL COMPONENT 

P

ARTS

INPUT

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

×

×

Fuel level sensor

×

×

×

Battery current sensor

×

×

×

ICC steering switch

×

×

×

ASCD steering switch

×

×

×

ICC brake switch

×

×

×

ASCD brake switch

×

×

×