Nissan Pathfinder (2012 year). Instruction — part 308

ECM

EC-545

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm the battery is fully charged. Refer to

PG-5, "How to Handle Battery"

.

ECM Harness Connector Terminal Layout

INFOID:0000000007358448

ECM Terminal and Reference Value

INFOID:0000000007358449

PREPARATION

ECM is located in the engine room passenger side behind battery.

ECM INSPECTION TABLE

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT.

CAUTION:

Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-

age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

HO2 S2 DIAG1 (B1)

DTC P0139 self-diagnosis (delayed response) has not been performed yet.

INCMP

DTC P0139 self-diagnosis (delayed response) has already been performed
successfully.

CMPLT

HO2 S2 DIAG1 (B2)

DTC P0159 self-diagnosis (delayed response) has not been performed yet.

INCMP

DTC P0159 self-diagnosis (delayed response) has already been performed
successfully.

CMPLT

HO2 S2 DIAG2 (B1)

DTC P0139 self-diagnosis (slow response) has not been performed yet.

INCMP

DTC P0139 self-diagnosis (slow response) has already been performed suc-
cessfully.

CMPLT

HO2 S2 DIAG2 (B2)

DTC P0159 self-diagnosis (slow response) has not been performed yet.

INCMP

DTC P0159 self-diagnosis (slow response) has already been performed suc-
cessfully.

CMPLT

MONITOR ITEM

CONDITION

SPECIFICATION

PBIB3368E

BBIA0386E

August 2012

2012 Pathfinder

EC-546

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

TER-

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NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

BR

ECM ground

[Engine is running]

• Idle speed

Body ground

2

G

A/F sensor 1 heater (bank 1)

[Engine is running]

•

Warm-up condition

• Idle speed

(More than 140 seconds after starting
engine)

Approximately 2.9 - 8.8 V

3

V

Throttle control motor power sup-
ply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

4

L/W

Throttle control motor (Close)

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released

0 - 14 V

5

L/B

Throttle control motor (Open)

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed

0 - 14 V

6

R

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 - 1.0 V

[Ignition switch: ON]

• Engine: Stopped

[Engine is running]

• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14 V)

10

W

Intake valve timing control sole-
noid valve (bank 1)

[Engine is running]

•

Warm-up condition

• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000rpm

7 - 12 V

PBIA8148J

PBIB1104E

PBIB1105E

PBIB1790E

August 2012

2012 Pathfinder

ECM

EC-547

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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11

LG

Intake valve timing control sole-
noid valve (bank 2)

[Engine is running]

•

Warm-up condition

• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000rpm

7 - 12 V

12

P

Power steering pressure sensor

[Engine is running]

• Steering wheel: Being turned

0.5 - 4.5 V

[Engine is running]

• Steering wheel: Not being turned

0.4 - 0.8 V

13

G

Crankshaft position sensor
(POS)

[Engine is running]

•

Warm-up condition

• Idle speed

NOTE:

The pulse cycle changes depending on
rpm at idle

Approximately 10 V

[Engine is running]

• Engine speed: 2,000 rpm

Approximately 10 V

14

SB

Camshaft position sensor
(PHASE)

[Engine is running]

•

Warm-up condition

• Idle speed

NOTE:

The pulse cycle changes depending on
rpm at idle

1.0 - 4.0 V

[Engine is running]

• Engine speed: 2,000 rpm

1.0 - 4.0 V

15

W

Knock sensor (bank 1)

[Engine is running]

• Idle speed

Approximately 2.5 V

16

L

A/F sensor 1 (bank 2)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000 rpm

Approximately 1.8 V
Output voltage varies with air fuel
ratio.

TER-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1790E

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

August 2012

2012 Pathfinder

EC-548

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

21
22
23
44

L
V
G
L

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 7

[Engine is running]

•

Warm-up condition

• Idle speed

NOTE:

The pulse cycle changes depending on
rpm at idle

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000 rpm

BATTERY VOLTAGE
(11 - 14 V)

24
43

G
G

A/F sensor 1 heater (bank 2)

[Engine is running]

•

Warm-up condition

• Idle speed

(More than 140 seconds after starting
engine)

Approximately 2.9 - 8.8 V

25

P

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 - 1.0 V

[Ignition switch: ON]

• Engine: Stopped

[Engine is running]

• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14 V)

32

W

EVAP control system pressure
sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8 V

34

BR

Intake air temperature sensor

[Engine is running]

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

35

O

A/F sensor 1 (bank 1)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000 rpm

Approximately 1.8 V
Output voltage varies with air fuel
ratio.

36

W

Knock sensor (bank 2)

[Engine is running]

• Idle speed

Approximately 2.5 V

TER-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

PBIA8148J

August 2012

2012 Pathfinder

ECM

EC-549

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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40
41
42
63

V
R
O
W

Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
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 - 14 V)

[Engine is running]

•

Warm-up condition

• Engine speed: 2,000 rpm

BATTERY VOLTAGE
(11 - 14 V)

45

R

EVAP canister purge volume
control solenoid valve

[Engine is running]

• Idle speed
• Accelerator pedal: Not depressed even

slightly, after engine starting

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]

• Engine speed: About 2,000 rpm (More

than 100 seconds after starting engine)

BATTERY VOLTAGE
(11 - 14 V)

46
60
61
62

LG
V
L
Y

Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1

[Engine is running]

•

Warm-up condition

• Idle speed

NOTE:

The pulse cycle changes depending on
rpm at idle

0 - 0.3 V

[Engine is running]

•

Warm-up condition

• Engine speed: 2,500 rpm

0.1 - 0.6 V

47

L

Sensor power supply
(Throttle position sensor)

[Ignition switch: ON]

Approximately 5 V

TER-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

SEC990C

SEC991C

SEC986C

SEC987C

August 2012

2012 Pathfinder

EC-550

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

48

SB

Sensor power supply
(EVAP control system pressure
sensor)

[Ignition switch: ON]

Approximately 5 V

49

P

Sensor power supply
(Refrigerant pressure sensor)

[Ignition switch: ON]

Approximately 5 V

50

W

Throttle position sensor 1

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released

More than 0.36 V

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed

Less than 4.75 V

51

P

Mass air flow sensor

[Engine is running]

•

Warm-up condition

• Idle speed

1.0 - 1.3 V

[Engine is running]

•

Warm-up condition

• Engine speed: 2,500 rpm

1.7 - 2.1 V

53

L

Intake valve timing control posi-
tion sensor (Bank 2)

[Engine is running]

•

Warm-up condition

• Idle speed

0 - 1.0 V

[Engine is running]

• Engine speed: 2,000 rpm

0 - 1.0 V

55

G

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 1.0 V

56

W

A/F sensor 1 (bank 1)

[Ignition switch: ON]

Approximately 2.2 V

TER-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB2046E

August 2012

2012 Pathfinder

ECM

EC-551

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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65
79
80
81

GR
P
GR
G

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 - 0.3 V

[Engine is running]

•

Warm-up condition

• Engine speed: 2,500 rpm

0.1 - 0.6 V

66

B

Sensor ground
(Throttle position sensor)

[Engine is running]

•

Warm-up condition

• Idle speed

Approximately 0 V

67

B

Sensor ground

[Engine is running]

•

Warm-up condition

• Idle speed

Approximately 0 V

68

G

Sensor power supply
(PSP sensor)

[Ignition switch: ON]

Approximately 5 V

69

R

Throttle position sensor 2

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released

Less than 4.75 V

[Ignition switch: ON]

• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed

More than 0.36 V

70

BR

Refrigerant pressure sensor

[Engine is running]

•

Warm-up condition

• Both A/C switch and blower fan switch:

ON (Compressor: Operates.)

1.0 - 4.0 V

71

R

Battery current sensor

[Engine is running]

• Battery: Fully charged*
• Idle speed

Approximately 2.6 - 3.5 V

72

Y

Intake valve timing control posi-
tion sensor (Bank 1)

[Engine is running]

•

Warm-up condition

• Idle speed

0 -1.0 V

[Engine is running]

• Engine speed: 2,000rpm

0 - 1.0 V

73

Y

Engine coolant temperature sen-
sor

[Engine is running]

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

TER-

MI-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

PBIB2046E

August 2012

2012 Pathfinder

EC-552

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

74

SB

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 1.0 V

75

P

A/F sensor 1 (bank 2)

[Ignition switch: ON]

Approximately 2.2 V

78

GR

Sensor ground
(Heated oxygen sensor 2)

[Engine is running]

•

Warm-up condition

• Idle speed

Approximately 0 V

82

B

Sensor ground
(APP sensor 1)

[Engine is running]

•

Warm-up condition

• Idle speed

Approximately 0 V

83

B

Sensor ground
(APP sensor 2)

[Engine is running]

•

Warm-up condition

• Idle speed

Approximately 0 V

85

W

Data link connector

—

—

86

P

CAN communication line

—

—

90

L

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5 V

91

G

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5 V

94

L

CAN communication line

—

—

98

GR

Accelerator pedal position sen-
sor 2

[Ignition switch: ON]

• Engine: Stopped
• Accelerator pedal: Fully released

0.28 - 0.48 V

[Ignition switch: ON]

• Engine: Stopped
• Accelerator pedal: Fully depressed

More than 2.0 V

99

SB

ASCD steering switch

[Ignition switch: ON]

• ASCD steering switch: OFF

Approximately 4 V

[Ignition switch: ON]

• MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

• CANCEL switch: Pressed

Approximately 1 V

[Ignition switch: ON]

• RESUME/ACCELERATE switch:

Pressed

Approximately 3 V

[Ignition switch: ON]

• SET/COAST switch: Pressed

Approximately 2 V

101

LG

Stop lamp switch

[Ignition switch: OFF]

• Brake pedal: Fully released

Approximately 0 V

[Ignition switch: OFF]

• Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14 V)

102

G

PNP signal

[Ignition switch: ON]

• Selector lever: P or N position

Approximately 0 V

[Ignition switch: ON]

• Selector lever: Except above position

BATTERY VOLTAGE
(11 - 14 V)

TER-

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NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

August 2012

2012 Pathfinder