Infiniti Q45. Manual - part 367

TROUBLE DIAGNOSIS

EC-107

C

D

E

F

G

H

I

J

K

L

M

A

EC

12

R

Power steering pressure 
sensor

[Engine is running]

●

Steering wheel: Being turned

0.5 - 4.5V

[Engine is running]

●

Steering wheel: Not being turned

0.4 - 0.8V

13

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

14

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

15

W

Knock sensor (bank 1)

[Engine is running]

●

Idle speed

Approximately 2.5V

16

W

A/F sensor 1 (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 3.1V

35

R

Approximately 2.6V

56

R/L

Approximately 2.3V

75

BR

Approximately 2.3V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

EC-108

TROUBLE DIAGNOSIS

21
22
23
40
41
42
44
63

W/B
Y
R/L
BR
G
B/R
BR
L

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4 
Fuel injector No. 2
Fuel injector No. 7
Fuel injector No. 8

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

24

SB

A/F sensor 1 heater
(bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

25

G

Heated oxygen sensor 2 
heater (bank 2)

[Engine is running]

●

Engine speed: Below 3,600 rpm after the 
following conditions are met

–

Engine: After warming up

–

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - 1.0V

[Ignition switch: ON]

●

Engine stopped

[Engine is running]

●

Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

28

LG

Cooling fan relay-1 (Middle)

[Engine is running]

●

Cooling fan: Not operating

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Cooling fan: Middle speed or high speed 
operating

0 - 1.0V

29

PU

VIAS control solenoid valve

[Engine is running]

●

Selector lever: P or N

0 - 1.0V

[Engine is running]

●

Selector lever: D

●

Engine speed: Below 5,000 rpm

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Engine speed: Above 5,000 rpm

0 - 1.0V

32

G

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0042E

PBIB0043E

PBIB1584E

TROUBLE DIAGNOSIS

EC-109

C

D

E

F

G

H

I

J

K

L

M

A

EC

34

L

Intake air temperature sen-
sor

[Engine is running]

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

36

W

Knock sensor (bank 2)

[Engine is running]

●

Idle speed

Approximately 2.5V

38

G/R

Fuel pump control module 
(FPCM) check

[When cranking engine]

Approximately 0V

[Engine is running]

●

Warm-up condition

●

Idle speed

4 - 6V

39

B/R

Fuel pump control module
(FPCM)

[When cranking engine]

0 - 0.5V

[Engine is running]

●

Warm-up condition

●

Idle speed

8 - 12V

45

L/Y

EVAP canister purge vol-
ume control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed: About 2,000 rpm (More than 
100 seconds after starting engine)

11 - 14V

46
60
61
62
65
79
80
81

L/R
GY/R
GY
Y/R
G/R
PU/W
W/R
W/G

Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1
Ignition signal No. 8
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle

0 - 0.2V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm

0.1 - 0.4V

47

L/W

Sensor power supply 
(Throttle position sensor)

[Ignition switch: ON]

Approximately 5V

48

R

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

[Ignition switch: ON]

Approximately 5V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0050E

PBIB0051E

PBIB0044E

PBIB0045E

EC-110

TROUBLE DIAGNOSIS

49

L

Sensor power supply
(Refrigerant pressure sen-
sor)

[Ignition switch: ON]

Approximately 5V

50

B

Throttle position sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

Less than 4.75V

51

B/Y

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

1.0 - 1.2V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

1.6 - 1.9V

53

W

Intake valve timing control 
position sensor (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

0 - 1.0V

[Engine is running]

●

Engine speed: 2,000 rpm

0 - 1.0V

55

PU

Heated oxygen sensor 2 
(bank 1)

[Engine is running]

●

Revving engine from idle to 3,000 rpm 
quickly after the following conditions are met

–

Engine: After warming up

–

After keeping the engine speed between 
3,500 and 4,000 rpm for 1 minute and at idle 
for 1 minute under no load

0 - Approximately 1.0V

57

G/Y

A/F sensor 1 (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 2.6V

58

G

Approximately 2.3V

76

L/W

Approximately 3.1V

77

GY

Approximately 2.3V

66

R

Sensor ground
(Throttle position sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

67

B

Sensor ground
(MAF sensor, IAT sensor, 
ECT sensor, FTT sensor, 
EVAP control system pres-
sure sensor, PSP sensor, 
ICC steering switch, ASCD 
steering switch, Refrigerant 
pressure sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB2046E