Nissan Frontier D22. Manual - part 542

TROUBLE DIAGNOSIS

EC-1271

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

18

R/W

Malfunction indicator 
lamp

[Ignition switch: ON]

0 - 1V

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

19

B/R

ECM ground

[Engine is running]

●

Idle speed

Engine ground

20

L/OR

Start signal

[Ignition switch: ON]

Approximately 0V

[Ignition switch: START]

9 - 12V

21

G/R

Air conditioner switch

[Engine is running]

●

Both A/C switch and blower switch are ON 
(Compressor operates)*

Approximately 0V

[Engine is running]

●

A/C switch is OFF

BATTERY VOLTAGE
(11 - 14V)

22

L/B

Park/neutral position 
(PNP) switch

[Ignition switch: ON] 

●

Shift lever: P or N (A/T), Neutral (M/T)

Approximately 0V

[Ignition switch: ON]

●

Except above position

Approximately 5V

23

L

Throttle position sensor

[Engine is running]

●

Warm-up condition

●

More than -40.0 kpa (-300 mmHg, -11.81 inHg) 
of vacuum is applied to the throttle opener with 
a hand vacuum pump

●

Accelerator pedal is fully released

0.15 - 0.85V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal is fully depressed

3.5 - 4.7V

24

W/L

Ignition switch

[Ignition switch: OFF]

0V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

25

B/Y

ECM ground

[Engine is running]

●

Idle speed

Engine ground

26

PU/W

A/T signal No. 1

[Engine is running]

●

Idle speed

Approximately 0 - 1.0V

27

P/B

A/T signal No. 2

[Engine is running]

●

Idle speed

Approximately 0 - 1.0V

28

BR/W

Throttle position switch 
(Closed position)

[Engine is running]

●

Warm-up condition

●

More than -40.0 kpa (-300 mmHg, -11.81 inHg) 
of vacuum is applied to the throttle opener with 
a hand vacuum pump

●

Accelerator pedal is fully released

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal is depressed

Approximately 0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-1272

[VG33ER]

TROUBLE DIAGNOSIS

29

G/B

Vehicle speed sensor

[Engine is running]

●

Lift up the vehicle

●

Shift lever: 2nd (M/T), D (A/T)

●

Vehicle speed is 40 km/h (25 MPH)

2 - 3V

32

B/Y

ECM ground

[Engine is running]

●

Idle speed

Engine ground 

35

G/R

A/T signal No. 3

[Engine is running]

●

Idle speed

Approximately 0 - 1.0V 

39

GY/R

Power steering oil pres-
sure switch

[Engine is running]

●

Steering wheel is being turned

Approximately 0V

[Engine is running]

●

Steering wheel is not being turned

Approximately 5V

42

B/W

Sensor power supply

[Ignition switch: ON]

Approximately 5V

43

BR

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

44

PU

Camshaft position sen-
sor (Reference signal)

[Engine is running]

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle

0.3 - 0.5V

[Engine is running]

●

Engine speed is 2,000 rpm

0.3 - 0.5V

46

G

Fuel level sensor

[Ignition switch: ON]

Approximately 0 - 4.8V
Output voltage varies with fuel 
level.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEF996U

SEF997U

SEF998U

TROUBLE DIAGNOSIS

EC-1273

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

47

L

Crankshaft position 
sensor (OBD)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle

1 - 2V

(AC range)

[Engine is running]

●

Engine speed is 2,000 rpm

3 - 4V

 (AC range)

49

LG

Camshaft position sen-
sor (Position signal)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle

Approximately 2.5V

[Engine is running]

●

Engine speed is 2,000 rpm

Approximately 2.5V

50

B

Heated oxygen sensor 
1 (bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

0 - Approximately 1.0V

51

G

Heated oxygen sensor 
1 (bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

0 - Approximately 1.0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEF690W

SEF691W

SEF999U

SEF001V

SEF002V

SEF002V

EC-1274

[VG33ER]

TROUBLE DIAGNOSIS

54

R

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

1.0 - 1.7V

[Engine is running]

●

Warm-up condition 

●

Engine speed is 2,500 rpm

1.7 - 2.3V

55

G

Mass air flow sensor 
ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

56

OR

Heated oxygen sensor 
2 (bank 1)

[Engine is running]

●

Warm-up condition

●

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

–

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

Y

Heated oxygen sensor 
2 (bank 2)

[Engine is running]

●

Warm-up condition

●

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

–

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

59

LG/R

Engine coolant temper-
ature sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with engine 
coolant temperature

60

Y/B

Fuel tank temperature 
sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel 
temperature

61

PU/R

Intake air temperature 
sensor

[Engine is running]

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

62

Y

EVAP control system 
pressure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

64

W

Knock sensor

[Engine is running]

●

Idle speed

Approximately 2.5V

66

B

Fuel level sensor 
ground

[Engine is running]

●

Idle speed

Approximately 0V

67

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

69

LG/R

Data link connector 

[Engine is running]

●

CONSULT-II or GST is disconnected

6 - 10V

72

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

80

SB

Power supply
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)