Nissan Frontier. Manual - part 491

 

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Nissan Frontier. Manual - part 491

 

 

ECM

EC-535

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

31

BR

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition 

switch OFF

0 - 1.5V

[Ignition switch: OFF]
• More than a few seconds after turning igni-

tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

33
46
48

SB

W

LG

Fuel injector No. 1
Fuel injector No. 5
Fuel injector No. 3

[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)

34

O

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

37

P

Heated oxygen sensor 2 
heater (Bank 1)

[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)

39

G

VIAS control solenoid valve

[Engine is running]
• Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Engine speed: Between 2,200 and 3,300 

rpm

0 - 1.0V

41

R

Heated oxygen sensor 2 
heater (Bank 2)

[Engine is running]
• Engine speed is 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)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

EC-536

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

42

Y

EVAP canister purge volume 
control solenoid valve

[Engine is running]
• Idle speed
• Accelerator pedal is not depressed even 

slightly, after engine starting

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Engine speed: About 2,000 rpm (More than 

100 seconds after starting engine)

BATTERY VOLTAGE
(11 - 14V)

43

V

Fuel pump relay

[Ignition switch: ON]
• For 1 second after turning ignition switch 

ON

[Engine is running]

0 - 1.5V

[Ignition switch: ON]
• More than 1 second after turning ignition 

switch ON

BATTERY VOLTAGE
(11 - 14V)

44
45
47

O

V
R

Fuel injector No. 2
Fuel injector No. 6
Fuel injector No. 4 

[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)

49

GR

Intake manifold runner con-
trol valve motor power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

50

BR

Intake manifold runner con-
trol valve motor (Open)

[Ignition switch: ON]
• Engine coolant temperature: Between –

12

°C (10°F) and 20°C (68°F)

• Accelerator pedal: Fully released 

→ de-

pressed

Battery voltage appears for about 
1 second.

53

Y

Intake manifold runner con-
trol valve motor (Close)

[Ignition switch: ON]
• Engine coolant temperature: Between –

12

°C (10°F) and 20°C (68°F)

• Accelerator pedal: Depressed 

→ fully re-

leased

Battery voltage appears for about 
1 second.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC990C

SEC991C

SEC984C

SEC985C

ECM

EC-537

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

54

O

Sensor power supply (Intake 
manifold runner control valve 
position sensor)

[Ignition switch: ON]

Approximately 5.0 V

55

L

Intake valve timing control so-
lenoid valve (Bank 1)

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

7 - 12V

56

B

Intake valve timing control so-
lenoid valve (Bank 2)

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

7 - 12V

57

W

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
- 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

58

G

Heated oxygen sensor 2 
(Bank 2)

[Engine is running]
• Revving engine from idle to 3,000 rpm 

quickly 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 - Approximately 1.0V

59

GR

Sensor ground
(Heated oxygen sensor 2)

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

Approximately 0V

63

BR

Refrigerant pressure sensor

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

(Compressor operates)

1.0 - 4.0V

64

LG

Sensor ground
(Refrigerant pressure sensor)

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

Approximately 0V

65

P

Power steering pressure sen-
sor

[Engine is running]
• Steering wheel: Being turned

0.5 - 4.5V

[Engine is running]
• Steering wheel: Not being turned

0.4 - 0.8V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

JMBIA1638GB

JMBIA1638GB

EC-538

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

66

R

Battery current sensor

[Engine is running]
• Battery: Fully charged

*1

• Idle speed

Approximately 2.6 - 3.5V

68

B

Sensor ground
(Battery current sensor)

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

Approximately 0V

69

O/L

A/F sensor 1 (Bank 1)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

Approximately 2.2V
Output voltage varies with air fuel 
ratio.

70

Y

Engine coolant temperature 
sensor

[Engine is running]

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

72

R

Sensor ground
(Power steering pressure 
sensor)

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

Approximately 0V

73

W/L

A/F sensor 1 (Bank 1)

[Ignition switch: ON]

Approximately 1.8V

74

SB

Intake air temperature sensor [Engine is running]

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

75

P

Sensor power supply
(Battery current sensor)

[Ignition switch: ON]

Approximately 5V

76

BR

Sensor ground
(Engine coolant temperature 
sensor, Engine oil tempera-
ture sensor)

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

Approximately 0V

77

BR

A/F sensor 1 (Bank 2)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

Approximately 2.2V
Output voltage varies with air fuel 
ratio.

78

V

Engine oil temperature sen-
sor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with engine 
oil temperature.

79

G

Sensor power supply
(Power steering pressure 
sensor)

[Ignition switch: ON]

Approximately 5V

80

B

Sensor ground
(Mass air flow sensor)

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

Approximately 0V

81

B/R

A/F sensor 1 (Bank 2)

[Ignition switch: ON]

Approximately 1.8V

82

P

Mass air flow sensor

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

0.9 - 1.2V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

1.5 - 1.8V

84

LG

Sensor ground
(Intake manifold runner con-
trol valve position sensor)

—

—

85

W

Knock sensor 
(Bank 1)

[Engine is running]
• Idle speed

Approximately 2.5V

86

W

Knock sensor
(Bank 2)

[Engine is running]
• Idle speed

Approximately 2.5V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

 

 

 

 

 

 

 

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