Content .. 299 300 301 302 ..

Nissan Pathfinder (2009 year). Manual - part 301

EC-422

< ECU DIAGNOSIS >

[VQ40DE]

ECM

LOAD SIGNAL

• Ignition switch: ON

Rear window defogger switch is ON
and/or lighting switch is in 2nd

Rear window defogger switch is OFF
and lighting switch is OFF

OFF

IGNITION SW

• Ignition switch: ON

→

OFF

→

OFF

→

HEATER FAN SW

• Engine: After warming up, idle the

engine

Heater fan: Operating.

Heater fan: Not operating

OFF

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

INJ PULSE-B1
INJ PULSE-B2

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

- 18

BTDC

2,000 rpm

- 45

BTDC

CAL/LD VALUE

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

5% - 35%

2,500 rpm

5% - 35%

MASS AIRFLOW

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

2.0 - 6.0 g·m/s

2,500 rpm

7.0 - 20.0 g·m/s

PURG VOL C/V

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)

2,000 rpm

—

INT/V TIM (B1)
INT/V TIM (B2)

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

−

- 5

2,000 rpm

Approx. 0

- 30

INT/V SOL (B1)
INT/V SOL (B2)

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Idle

0% - 2%

2,000 rpm

Approx. 0% - 50%

VIAS S/V-1

• Engine: After warming up

2,200 - 3,300 rpm

Except above conditions

OFF

AIR COND RLY

• Engine: After warming up, idle the

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

FUEL PUMP RLY

• For 1 second after turning ignition switch ON
• Engine running or cranking

• Except above conditions

OFF

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

COOLING FAN

• Engine: After warming up, idle the

engine

• Air conditioner switch: OFF

Engine coolant temperature: 97

(207

F) or less

OFF

Engine coolant temperature: Between
98

C (208

F) and 104

C (219

LOW

Engine coolant temperature: 105

(221

F) or more

MONITOR ITEM

CONDITION

SPECIFICATION

2009 Pathfinder

ECM

EC-423

< ECU DIAGNOSIS >

[VQ40DE]

*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 that the battery is fully charged. Refer to

PG-5, "How to Handle Battery"

HO2S2 HTR (B1)
HO2S2 HTR (B2)

• 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

• Engine speed: Above 3,600 rpm

OFF

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as the
speedometer indication

VEHICLE SPEED

• Turn drive wheels and compare the CONSULT-III value with speedometer

indication.

Almost the same speed as the
speedometer indication

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has
turned ON.

0 - 65,535 km
(0 - 40,723 mile)

A/F S1 HTR (B1)
A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

4 - 100%

AC PRESS SEN

• Engine: Idle
• Both A/C switch blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

VHCL SPEED SE

• Turn drive wheels and compare speedometer indication with the CON-

SULT-III value.

Almost the same speed as the
CONSULT-III value

SET VHCL SPD

• Engine: Running

ASCD: Operating.

The preset vehicle speed is dis-
played.

MAIN SW

• Ignition switch: ON

MAIN switch: Pressed

MAIN switch: Released

OFF

CANCEL SW

• Ignition switch: ON

CANCEL switch: Pressed

CANCEL switch: Released

OFF

RESUME/ACC SW

• Ignition switch: ON

RESUME/ACCELERATE switch:
Pressed

RESUME/ACCELERATE switch: Re-
leased

OFF

SET SW

• Ignition switch: ON

SET/COAST switch: Pressed

SET/COAST switch: Released

OFF

BRAKE SW1

• Ignition switch: ON

Brake pedal: Fully released

Brake pedal: Slightly depressed

OFF

BRAKE SW2

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

CRUISE LAMP

• Ignition switch: ON

MAIN switch: pressed at the 1st time

→

at the 2nd time

→

OFF

SET LAMP

• MAIN switch: ON
• When vehicle speed is between

40km/h (25MPH) and 144km/h
(89MPH)

ASCD: Operating

ASCD: Not operating

OFF

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle

• Battery: Fully charged*

• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Approx. 2,600 - 3,500 mV

ALT DUTY SIG

• Power generation voltage variable control: Operating

• Power generation voltage variable control: Not operating

OFF

MONITOR ITEM

CONDITION

SPECIFICATION

2009 Pathfinder

EC-424

< ECU DIAGNOSIS >

[VQ40DE]

ECM

ECM Harness Connector Terminal Layout

INFOID:0000000004297657

ECM Terminal and Reference Value

INFOID:0000000004297658

PREPARATION

ECM located in the engine room passenger side behind reservoir
tank.

ECM INSPECTION TABLE

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.

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.

MBIB0045E

BBIA0537E

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

ECM ground

[Engine is running]
• Idle speed

Body ground

A/F sensor 1 heater (Bank 1)

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

(More than 140 seconds after starting en-
gine)

Approximately 2.9 - 8.8V

Throttle control motor relay
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

L/W

Throttle control motor (Close)

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully released

0 - 14V

PBIA8148J

PBIB1104E

2009 Pathfinder

ECM

EC-425

< ECU DIAGNOSIS >

[VQ40DE]

L/B

Throttle control motor (Open)

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully depressed

0 - 14V

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)

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: 2,500 rpm

7 - 12V

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: 2,500 rpm

7 - 12V

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-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1105E

PBIB1790E

2009 Pathfinder

EC-426

< ECU DIAGNOSIS >

[VQ40DE]

ECM

Crankshaft position sensor
(POS)

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

NOTE:
The pulse cycle changes depending on rpm
at idle

Approximately 10V

[Engine is running]
• Engine speed: 2,000 rpm

Approximately 10V

Camshaft position sensor
(PHASE) (Bank 2)

[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

Knock sensor
(Bank 1)

[Engine is running]
• Idle speed

Approximately 2.5V

A/F sensor 1 (Bank 2)

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

Approximately 1.8V
Output voltage varies with air fuel
ratio.

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

2009 Pathfinder

ECM

EC-427

< ECU DIAGNOSIS >

[VQ40DE]

21
22
23

W
LG
SB

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

[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
43

G
G

A/F sensor 1 heater (Bank 2)

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

(More than 140 seconds after starting en-
gine)

Approximately 2.9 - 8.8V

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)

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

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

PBIA8148J

2009 Pathfinder

EC-428

< ECU DIAGNOSIS >

[VQ40DE]

ECM

Camshaft position sensor
(PHASE) (Bank 1)

[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

Intake air temperature sensor

[Engine is running]

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

A/F sensor 1 (Bank 1)

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

Approximately 1.8V
Output voltage varies with air fuel
ratio.

Knock sensor
(Bank 2)

[Engine is running]
• Idle speed

Approximately 2.5V

40
41
42

V
R
O

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

[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)

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1039E

PBIB1040E

SEC984C

SEC985C

2009 Pathfinder

ECM

EC-429

< ECU DIAGNOSIS >

[VQ40DE]

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)

Sensor power supply (Throt-
tle position sensor)

[Ignition switch: ON]

Approximately 5V

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

[Ignition switch: ON]

Approximately 5V

Sensor power supply
(Refrigerant pressure sensor/
Battery current sensor)

[Ignition switch: ON]

Approximately 5V

Throttle position sensor 1

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully depressed

Less than 4.75V

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

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

A/F sensor 1 (Bank 1)

[Ignition switch: ON]

Approximately 2.2V

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC990C

SEC991C

2009 Pathfinder

Content .. 299 300 301 302 ..