Infiniti FX35, FX50 (S51). Manual - part 1185

ECM

HAC-137

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

102

(SB)

111

(V)

ICC steering switch

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 switch: Pressed

1.0 V

104

(R)

119
(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

105

(L)

—

CAN communication line

Input/

Output

—

—

106

(L)

128

(B)

Ignition switch

Input

[Ignition switch: OFF]

0 V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

108

(Y)*

3

(P)*

4

115

(GR)

Accelerator pedal position 
sensor 2

Input

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

0.22 - 0.5 V

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

2.1 - 2.5 V

110

(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)

111

(V)

—

Sensor ground
(ASCD steering switch)

—

—

—

112

(LG)

128

(B)

Fuel pump control module
(FPCM) check

Input

[When cranking engine]

0 V

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

4 - 6 V

114

(GR)

—

Data link connector

Input/

Output

—

—

115

(BR)*

3

(GR)*

4

—

Sensor ground
(Accelerator pedal position 
sensor 2)

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

HAC-138

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

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

116

(G)

128

(B)

PNP switch

Input

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

BATTERY VOLTAGE
(11 - 14 V)

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

tion

0 V

117

(BR)

128

(B)

ASCD brake switch

Input

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

0 V

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

BATTERY VOLTAGE
(11 - 14 V)

118

(R)

128

(B)

Power supply for ECM
(Back-up)

Input

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14 V)

119
(W)

—

Sensor ground
(Accelerator pedal position 
sensor 1)

—

—

—

120
(W)

128

(B)

Fuel tank temperature sensor

Input

[Engine is running]

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

121

(GR)

128

(B)

Power supply for ECM

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

123

(B)

—

ECM ground

—

—

—

125

(R)

128

(B)

Fuel pump control module
(FPCM)

Output

[When cranking engine]

0 - 0.5 V

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

8 - 12 V

127

(LG)

128

(B)

EVAP canister vent control 
valve

Output

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

128

(B)

—

ECM ground

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

UNIFIED METER AND A/C AMP.

HAC-139

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

UNIFIED METER AND A/C AMP.

Reference Value

INFOID:0000000005601970

TERMINAL LAYOUT

PHYSICAL VALUES

JSIIA0097ZZ

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

−

Signal name

Input/

Output

20

*

(L)

Ground

ION ON/OFF signal 

Output

Blower fan: ON

0 V

Blower fan: OFF

12 V

38

(L)

Ground

Blower motor control signal

 Output

• Ignition switch ON
• Blower speed: 1st speed 

(manual)

41

(V)

Ground

ACC power supply

—

Ignition switch ACC

Battery voltage

43

(R)

Ground

Intake sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with intake 

temperature.

44

(LG)

Ground

In-vehicle sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with in-vehi-

cle temperature.

45

(P)

Ground

Ambient sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with ambient 

temperature.

46

(O)

Ground

Sunload sensor signal

Input

Ignition switch ON

0 – 4.8 V

Output voltage varies with amount 

of sunload.

47

*

(V)

Ground

Gas sensor signal 

Input

NOTE:
The signal is different by mea-
surement environment of a ve-
hicle

53

(G)

Ground

IGN power supply

—

Ignition switch ON

Battery voltage

JSIIA0096ZZ

ZJIA1163J

HAC-140

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

UNIFIED METER AND A/C AMP.

*: With advanced climate control system (ACCS)
*: Unified meter and A/C amp. is not used for control.

54

(O)

Ground

BAT power supply

—

Ignition switch OFF

Battery voltage

55

(B)

Ground

Ground

—

Ignition switch ON

0 V

56

(L)

Ground

CAN-H

—

—

—

59

(GR)

Ground

Intake sensor ground

—

Ignition switch ON

0 V

60

(L)

Ground

In-vehicle sensor ground

—

Ignition switch ON

0 V

61

(BR)

Ground

Ambient sensor ground

—

Ignition switch ON

0 V

62

(SB)

Ground

Sunload sensor ground

—

Ignition switch ON

0 V

63

*

(R)

Ground

 —

—

—

—

65

(O)

Ground

ECV (Electrical Control 
Valve) signal

Output

• Ignition switch ON
• Self-diagnosis. STEP-4

(Code No. 45)

69

(L)

Ground

A/C LAN signal

Input/

Output

Ignition switch ON

70

(R)

Ground

Each door motor power sup-
ply

Output

Ignition switch ON

12 V

71

(B)

Ground

Ground

—

Ignition switch ON

 0 V

72

(P)

Ground

CAN-L

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

−

Signal name

Input/

Output

SJIA1607E

SJIA1453J