Infiniti M45 (Y34). Manual - part 353

TROUBLE DIAGNOSIS

EC-101

C

D

E

F

G

H

I

J

K

L

M

A

EC

35

Y/G

MIL

[Ignition switch: ON]

0 - 1.0V

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

38

W/G

Tachometer signal

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle.

3 - 6V

[Engine is running]

●

Engine speed: 2,500 rpm.

3 - 6V

39

OR

ASCD communication line

[Engine is running]

●

Idle speed

3 - 6V

41

GY

Fuel pump relay

[Ignition switch: ON]

●

For a few seconds after turning ignition 
switch ON

[Engine is running]

0 - 1.0V

[Ignition switch: ON]

●

More than a few seconds after turning igni-
tion switch ON.

BATTERY VOLTAGE
(11 - 14V)

42

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

A few seconds after turning ignition switch 
OFF

0 - 1.0V

[Ignition switch: OFF]

●

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

43

G/Y

Vacuum cut valve bypass 
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

47

R

Cooling fan speed control 
solenoid valve

[Engine is running]

●

Idle speed

6.5 - 8V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0046E

PBIB0047E

PBIB0048E

PBIB0049E

EC-102

TROUBLE DIAGNOSIS

53

W/G

Ignition switch

[Ignition switch: OFF]

0V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

54

L/Y

EVAP canister purge vol-
ume control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed is about 2,000 rpm (More than 
100 seconds after starting engine).

BATTERY VOLTAGE

(11 - 14V)

59

SB

Start signal

[Ignition switch: ON]

Approximately 0V

[Ignition switch: START]

9 - 12V

63

P/L

Crankshaft position sensor 
(POS)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle.

1.0 - 2.0V

[Engine is running]

●

Engine speed: 2,000 rpm.

1.0 - 2.0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0050E

PBIB0051E

PBIB0052E

PBIB0053E

TROUBLE DIAGNOSIS

EC-103

C

D

E

F

G

H

I

J

K

L

M

A

EC

73

Y

Intake valve timing control 
position sensor (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle.

0 - 1.0V

[Engine is running]

●

Engine speed: 2,000 rpm.

0 - 1.0V

74

W

Intake valve timing control 
position sensor (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle.

0 - 1.0V

[Engine is running]

●

Engine speed: 2,000 rpm.

0 - 1.0V

80

GY/R

PNP switch

[Ignition switch: ON]

●

Selector lever: P or N.

Approximately 0V

[Ignition switch: ON]

●

Except above

Approximately 5V

84

L/W

Camshaft position sensor 
(PHASE)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle.

1.0 - 4.0V

[Engine is running]

●

Engine speed: 2,000 rpm.

1.0 - 4.0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0054E

PBIB0055E

PBIB0054E

PBIB0055E

PBIB0056E

PBIB0057E

EC-104

TROUBLE DIAGNOSIS

87

L/W

Accelerator pedal position 
sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully depressed

Less than 4.75V

88

P

Refrigerant pressure sen-
sor

[Engine is running]

●

Warm-up condition

●

Both A/C switch and blower switch: ON.

(Compressor operates.)

1.0 - 4.0V

89

B

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

91

B/Y

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

1.1 - 1.5V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm.

1.7 - 2.4V

92

PU/W

Fuel tank temperature sen-
sor

[Engine is running]

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

94

G

Sensor power supply 
(Accelerator pedal position 
sensor 2)

[Ignition switch: ON]

Approximately 2.5V

95

W

Power supply for ECM 
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

98

W

Throttle position sensor 2

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

Less than 4.75V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

More than 0.36V

99

L

Intake air temperature sen-
sor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with intake 
air temperature.

100

BR

Sensor ground 
(Accelerator pedal position 
sensor 2)

[Ignition switch: ON]

Approximately 0V

103

L

Sensor power supply

[Ignition switch: ON]

Approximately 5V

106

R/W

Stop lamp switch

[Ignition switch: OFF]

●

Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]

●

Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

107

B

Fuel level sensor ground

[Engine is running]

●

Idle speed

Approximately 0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)