Infiniti FX35, FX50 (S51). Manual - part 743

ECM

EC-513

< ECU DIAGNOSIS INFORMATION >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

88

(L)

—

Sensor ground
[Exhaust valve timing con-
trol position sensor (bank 
1), Exhaust valve timing 
control position sensor 
(bank 2)]

—

—

—

91

(SB)

95

(G)

Battery current sensor

Input

[Engine is running]

• Battery: Fully charged*

2

• Idle speed

2.6 - 3.5 V

92

(P)

—

Sensor ground
[Camshaft position sensor 
(bank 2)]

—

[Engine is running]
• Warm-up condition
• Idle speed

0 V

93

(P)

128

(B)

Power supply for ECM 
(Back-up)

Input

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14 V)

94

(LG)

—

Sensor ground
[Mass air flow sensor (bank 
2)]

—

—

—

95

(G)

—

Sensor ground
(Battery current sensor)

—

—

—

96

(B)

—

Sensor ground
[Camshaft position sensor 
(bank 1), Power steering 
pressure sensor]

—

—

—

97

(R)

100
(W)

Accelerator pedal position 
sensor 1

Input

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released

0.45 - 1.0 V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed

4.4 - 4.8 V

98

(Y)*

3

(P)*

4

104

(BR)*

3

(GR)*

4

Accelerator pedal position 
sensor 2

Input

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released

0.22 - 0.50 V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed

2.1 - 2.5 V

99

(G)*

3

(L)*

4

100
(W)

Sensor power supply
(Accelerator pedal position 
sensor 1)

—

[Ignition switch: ON]

5 V

100
(W)

—

Sensor ground
(Accelerator pedal position 
sensor 1)

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

EC-514

< ECU DIAGNOSIS INFORMATION >

[VQ35HR]

ECM

101

(SB)

108

(V)

ICC steering switch
(models with ICC system)

Input

[Ignition switch: ON]
• ICC steering switch: OFF

4.2 V

[Ignition switch: ON]
• MAIN switch: Pressed

0 V

[Ignition switch: ON]
• CANCEL switch: Pressed

1.9 V

[Ignition switch: ON]
• RESUME/ACCELERATE switch: 

Pressed

3.7 V

[Ignition switch: ON]
• SET/COAST switch: Pressed

3.2 V

[Ignition switch: ON]
• DISTANCE switch: Pressed

2.6 V

[Ignition switch: ON]
• LDP/DCA switch: Pressed

1 V

101

(SB)

108

(V)

ASCD steering switch
(models with ASCD sys-
tem)

Input

[Ignition switch: ON]
• ASCD steering switch: OFF

4 V

[Ignition switch: ON]
• MAIN switch: Pressed

0 V

[Ignition switch: ON]
• CANCEL switch: Pressed

1 V

[Ignition switch: ON]
• RESUME/ACCELERATE switch: 

Pressed

3 V

[Ignition switch: ON]
• SET/COAST switch: Pressed

2 V

102

(LG)

112

(V)

EVAP control system pres-
sure sensor

Input

[Ignition switch: ON]

1.8 - 4.8 V

103

(L)*

3

(G)*

4

104

(BR)*

3

(GR)*

4

Sensor power supply
(Accelerator pedal position 
sensor 2)

—

[Ignition switch: ON]

5 V

104

(BR)*

3

(GR)*

4

—

Sensor ground
(Accelerator pedal position 
sensor 2)

—

—

—

105

(L)

116
(W)

Refrigerant pressure sen-
sor

Input

[Engine is running]
• Warm-up condition
• Both A/C switch and blower fan mo-

tor switch: ON (Compressor oper-
ates)

1.0 - 4.0 V

106
(W)

128

(B)

Fuel tank temperature sen-
sor

Input

[Engine is running]

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

107

(BR)

112

(V)

Sensor power supply
(EVAP control system pres-
sure sensor)

—

[Ignition switch: ON]

5 V

108

(V)

—

Sensor ground
(ASCD/ICC steering 
switch)

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

ECM

EC-515

< ECU DIAGNOSIS INFORMATION >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

109

(G)

128

(B)

PNP signal

Input

[Ignition switch: ON]
• Selector lever: P or N

BATTERY VOLTAGE
(11 - 14 V)

[Ignition switch: ON]
• Selector lever: Except above

0 V

110

(R)

128

(B)

Engine speed signal output

Output

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending 
on rpm at idle

1 V

[Engine is running]
• Engine speed is 2,000 rpm

1 V

111

(O)

116
(W)

Sensor power supply
(Refrigerant pressure sen-
sor)

—

[Ignition switch: ON]

5 V

112

(V)

—

Sensor ground
(EVAP control system pres-
sure sensor)

—

—

—

113

(P)

—

CAN communication line

Input/

Output

—

—

114

(L)

—

CAN communication line

Input/

Output

—

—

116
(W)

—

Sensor ground
(Refrigerant pressure sen-
sor)

—

—

—

117

(GR)

—

Data link connector

Input/

Output

—

—

121

(LG)

128

(B)

EVAP canister vent control 
valve

Output

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

122

(P)

128

(B)

Stop lamp switch

Input

[Ignition switch: OFF]
• Brake pedal: Fully released

0 V

[Ignition switch: OFF]
• Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14 V)

123

(B)

124

(B)

—

ECM ground

—

—

—

125

(GR)

128

(B)

Power supply for ECM

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

JMBIA0076GB

JMBIA0077GB

EC-516

< ECU DIAGNOSIS INFORMATION >

[VQ35HR]

ECM

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

*1: This may vary depending on internal resistance of the tester.

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

PG-3, "How to Handle Battery"

.

*3: Models with ICC

*4: Models with ASCD

126

(BR)

128

(B)

ICC brake switch (models 
with ICC system)
ASCD brake switch (mod-
els with ASCD system)

Input

[Ignition switch: ON]
• Brake pedal: Slightly depressed

0 V

[Ignition switch: ON]
• Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14 V)

127

(B)

128

(B)

—

ECM ground

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output