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Nissan Pathfinder (2011 year). Manual - part 310

EC-534

< SYSTEM DESCRIPTION >

[VK56DE]

DIAGNOSIS SYSTEM (ECM)

INJ PULSE-B1

msec

• Indicates the actual fuel injection pulse width

compensated by ECM according to the input sig-
nals.

• When the engine is stopped, a certain com-

puted value is indicated.

INJ PULSE-B2

msec

IGN TIMING

BTDC

• Indicates the ignition timing computed by ECM

according to the input signals.

• When the engine is stopped, a certain value

is indicated.

CAL/LD VALUE

• “Calculated load value” indicates the value of the

current air flow divided by peak air flow.

MASS AIRFLOW

g/s

• Indicates the mass air flow computed by ECM ac-

cording to the signal voltage of the mass air flow
sensor.

PURG VOL C/V

• Indicates the EVAP canister purge volume control

solenoid valve control value computed by ECM
according to the input signals.

• The opening becomes larger as the value in-

creases.

INT/V TIM(B1)

• Indicates [

CA] of intake camshaft advanced an-

gle.

INT/V TIM(B2)

INT/V SOL(B1)

• The control value of the intake valve timing con-

trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.

• The advance angle becomes larger as the value

increases.

INT/V SOL(B2)

AIR COND RLY

ON/OFF

• The air conditioner relay control condition (deter-

mined by ECM according to the input signals) is
indicated.

FUEL PUMP RLY

ON/OFF

• Indicates the fuel pump relay control condition

determined by ECM according to the input sig-
nals.

VENT CONT/V

ON/OFF

• The control condition of the EVAP canister vent

control valve (determined by ECM according to
the input signals) is indicated.
ON: Closed
OFF: Open

THRTL RELAY

ON/OFF

• Indicates the throttle control motor relay control

condition determined by ECM according to the in-
put signals.

COOLING FAN

HI/LOW/

OFF

• The control condition of the cooling fan (deter-

mined by ECM according to the input signals) is
indicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop

HO2S2 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated oxygen

sensor 2 heater determined by ECM according to
the input signals.

HO2S2 HTR (B2)

ON/OFF

I/P PULLY SPD

rpm

• Indicates the engine speed computed from the in-

put speed sensor signal.

VEHICLE SPEED

km/h or

mph

• Indicates the vehicle speed computed from the

output speed sensor signal.

IDL A/V LEARN

YET/CM-

PLT

• Displays the condition of Idle Air Volume Learning

YET: Idle Air Volume Learning has not been per-
formed yet.
CMPLT: Idle Air Volume Learning has already
been performed successfully.

TRVL AFTER MIL

km or

mile

• Distance traveled while MIL is activated.

Monitored item

Unit

Description

Remarks

2011 Pathfinder

DIAGNOSIS SYSTEM (ECM)

EC-535

< SYSTEM DESCRIPTION >

[VK56DE]

A/F S1 HTR(B1)

• A/F sensor 1 heater control value computed by

ECM according to the input signals.

• The current flow to the heater becomes larger as

the value increases.

A/F S1 HTR(B2)

AC PRESS SEN

• The signal voltage from the refrigerant pressure

sensor is displayed.

VHCL SPEED SE

km/h or

mph

• The vehicle speed computed from the vehicle

speed signal sent from unified meter control unit
is displayed.

SET VHCL SPD

km/h or

mph

• The preset vehicle speed is displayed.

MAIN SW

ON/OFF

• Indicates [ON/OFF] condition from MAIN switch

signal.

CANCEL SW

ON/OFF

• Indicates [ON/OFF] condition from CANCEL

switch signal.

RESUME/ACC SW

ON/OFF

• Indicates [ON/OFF] condition from RESUME/AC-

CELERATE switch signal.

SET SW

ON/OFF

• Indicates [ON/OFF] condition from SET/COAST

switch signal.

BRAKE SW1

ON/OFF

• Indicates [ON/OFF] condition from ASCD brake

switch signal.

BRAKE SW2

ON/OFF

• Indicates [ON/OFF] condition of stop lamp switch

signal.

VHCL SPD CUT

NON/

CUT

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed increased to excessively
high compared with the ASCD set speed, and
ASCD operation is cut off.

LO SPEED CUT

NON/

CUT

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low compared with the ASCD set speed, and
ASCD operation is cut off.

AT OD MONITOR

ON/OFF

• Indicates [ON/OFF] condition of A/T O/D accord-

ing to the input signal from TCM.

AT OD CANCEL

ON/OFF

• Indicates [ON/OFF] condition of A/T O/D cancel

signal sent from TCM.

CRUISE LAMP

ON/OFF

• Indicates [ON/OFF] condition of CRUISE lamp

determined by ECM according to the input sig-
nals.

SET LAMP

ON/OFF

• Indicates [ON/OFF] condition of SET lamp deter-

mined by ECM according to the input signals.

ALT DUTY

• Indicates the duty ratio of the power generation

command value. The ratio is calculated by ECM
based on the battery current sensor signal.

BAT CUR SEN

• The signal voltage of battery current sensor is

displayed.

ALT DUTY SIG

ON/OFF

• The control condition of the power generation

voltage variable control (determined by ECM ac-
cording to the input signals) is indicated.
ON: Power generation voltage variable control is
active.
OFF: Power generation voltage variable control is
inactive.

Monitored item

Unit

Description

Remarks

2011 Pathfinder

EC-536

< SYSTEM DESCRIPTION >

[VK56DE]

DIAGNOSIS SYSTEM (ECM)

NOTE:

Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE

Test Item

A/F ADJ-B1

—

• Indicates the correction factor stored in ECM. The

factor is calculated from the difference between
the target air/fuel ratio stored in ECM and the air-
fuel ratio calculated from A/F sensor 1 signal.

A/F ADJ-B2

—

HO2 S2 DIAG2
(B1)
[INCMP/CMPLT]

• Indicates DTC P0139 self-diagnosis (slow re-

sponse) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

The item is indicated, but not used.

HO2 S2 DIAG2
(B2)
[INCMP/CMPLT]

• Indicates DTC P0159 self-diagnosis (slow re-

sponse) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

The item is indicated, but not used.

Monitored item

Unit

Description

Remarks

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

• Engine: Return to the original

trouble condition

• Change the amount of fuel injec-

tion using CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

• Engine: Return to the original

trouble condition

• Timing light: Set
• Retard the ignition timing using

CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Perform Idle Air Volume Learning.

POWER BAL-
ANCE

• Engine: After warming up, idle the

engine.

• A/C switch: OFF
• Selector lever: P or N
• Cut off each injector signal one at

a time using CONSULT-III.

Engine runs rough or dies.

• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil

COOLING FAN*

• Ignition switch: ON
• Turn the cooling fan HI and OFF

using CONSULT-III.

Cooling fan moves and stops.

• Harness and connectors
• Cooling fan motor
• IPDM E/R

ENG COOLANT
TEMP

• Engine: Return to the original

trouble condition

• Change the engine coolant tem-

perature using CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Engine coolant temperature sen-

sor

• Fuel injector

FUEL PUMP RE-
LAY

• Ignition switch: ON

(Engine stopped)

• Turn the fuel pump relay ON and

OFF using CONSULT-III and lis-
ten to operating sound.

Fuel pump relay makes the operat-
ing sound.

• Harness and connectors
• Fuel pump relay

PURG VOL
CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve
opening percent using CON-
SULT-III.

Engine speed changes according to
the opening percent.

• Harness and connectors
• Solenoid valve

FUEL/T TEMP
SEN

• Change the fuel tank temperature using CONSULT-III.

2011 Pathfinder

DIAGNOSIS SYSTEM (ECM)

EC-537

< SYSTEM DESCRIPTION >

[VK56DE]

*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS Mode

For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT-III screen; for items whoseSRT

codes are not set, “INCMP” is displayed.

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC WORK SUPPORT Mode

*: DTC P1442 and P1456 does not apply to R51 models but appears in DTC Work Support Mode screens.

VENT CON-
TROL/V

• Ignition switch: ON

(Engine stopped)

• Turn solenoid valve ON and OFF

with the CONSULT-III and listen
to operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

V/T ASSIGN AN-
GLE

• Engine: Return to the original

trouble condition

• Change intake valve timing using

CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT-III.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE
SYSTEM

PURG FLOW P0441

P0441

EC-744, "DTC Confirmation Procedure"

EVP SML LEAK P0442/P1442*

P0455

EC-785, "DTC Confirmation Procedure"

EVP V/S LEAK P0456/P1456*

P0442

EC-750, "DTC Confirmation Procedure"

P0456

EC-793, "DTC Confirmation Procedure"

PURG VOL CN/V P1444

P0443

EC-757, "DTC Confirmation Procedure"

A/F SEN1

A/F SEN1 (B1) P1276

P0130

EC-665, "DTC Confirmation Procedure"

A/F SEN1 (B1) P1278/P1279

P0133

EC-677, "DTC Confirmation Procedure"

A/F SEN1 (B2) P1286

P0150

EC-665, "DTC Confirmation Procedure"

A/F SEN1 (B2) P1288/P1289

P0153

EC-677, "DTC Confirmation Procedure"

HO2S2

HO2S2 (B1) P0139

P0139

EC-696, "DTC Confirmation Procedure"

HO2S2 (B1) P1146

P0138

EC-688, "DTC Confirmation Procedure"

HO2S2 (B1) P1147

P0137

EC-683, "DTC Confirmation Procedure"

HO2S2 (B2) P0159

P0159

EC-696, "DTC Confirmation Procedure"

HO2S2 (B2) P1166

P0158

EC-688, "DTC Confirmation Procedure"

HO2S2 (B2) P1167

P0157

EC-683, "DTC Confirmation Procedure"

2011 Pathfinder

EC-538

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

ECU DIAGNOSIS INFORMATION

ECM

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000006244625

Remarks:

Specification data are reference values.

Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.

i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show

the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-

ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor

and other ignition timing related sensors.

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

• Run engine and compare CONSULT-III value with the tachometer indication.

Almost the same speed as the
tachometer indication.

MAS A/F SE-B1

See

EC-601, "Description"

B/FUEL SCHDL

See

EC-601, "Description"

A/F ALPHA-B1
A/F ALPHA-B2

See

EC-601, "Description"

COOLAN TEMP/S

• Engine: After warming up

More than 70

C (158

A/F SEN1 (B1)
A/F SEN1 (B2)

• Engine: After warming up

Maintaining engine speed at 2,000
rpm

Fluctuates around 2.2 V

HO2S2 (B1)
HO2S2 (B2)

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

are met.

• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and

at idle for 1 minute under no load

0 - 0.3 V

←→

Approx. 0.6 - 1.0

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

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

are met.

- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle

for 1 minute under no load

LEAN

←→

RICH

VHCL SPEED SE

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

indication.

Almost the same speed as the
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14 V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.65 - 1.87 V

Accelerator pedal: Fully depressed

More than 4.3 V

ACCEL SEN 2*

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.56 - 0.96 V

Accelerator pedal: Fully depressed

More than 4.0 V

TP SEN 1-B1
TP SEN 2-B1*

• Ignition switch: ON

(Engine stopped)

• Selector lever: D

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

EVAP SYS PRES

• Ignition switch: ON

Approx. 1.8 - 4.8 V

START SIGNAL

• Ignition switch: ON

→

START

→

OFF

→

OFF

CLSD THL POS

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

Accelerator pedal: Slightly depressed

OFF

AIR COND SIG

• Engine: After warming up, idle the

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor: Operates.)

P/N POSI SW

• Ignition switch: ON

Selector lever: P or N position

Selector lever: Except above position

OFF

2011 Pathfinder

ECM

EC-539

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

PW/ST SIGNAL

• Engine: After warming up, idle the

engine

Steering wheel: Not being turned
(Forward direction)

OFF

Steering wheel: Being turned

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 control switch: OFF

OFF

Heater fan control switch: ON

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

INJ PULSE-B1
INJ PULSE-B2

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

Idle

2.0 - 2.8 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

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

Idle

- 20

BTDC

2,000 rpm

- 45

BTDC

CAL/LD VALUE

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

Idle

14% - 33%

2,500 rpm

12% - 25%

MASS AIRFLOW

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

Idle

3.0 - 9.0 g/s

2,500 rpm

9.0 - 28.0 g/s

PURG VOL C/V

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

Idle
(Accelerator pedal: Not depressed
even slightly, after engine starting.)

2,000 rpm

—

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

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

Idle

−

- 5

2,000 rpm

Approx. 0

- 20

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

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

Idle

0% - 2%

2,000 rpm

Approx. 25% - 50%

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

MONITOR ITEM

CONDITION

SPECIFICATION

2011 Pathfinder

EC-540

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

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 100

C (212

LOW

Engine coolant temperature: 101

(214

F) or more

HO2S2 HTR (B1)
HO2S2 HTR (B2)

• 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

• 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
tachometer indication

VEHICLE SPEED

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

indication.

Almost the same speed as the
speedometer indication

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has illu-
minated.

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 and blower fan switch: ON (Compressor operates.)

1.0 - 4.0 V

VHCL SPEED SE

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

indication.

Almost the same speed as the
speedometer indication

SET VHCL SPD

• Engine: Running

ASCD: Operating.

The preset vehicle speed is
displayed.

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
• Vehicle speed: Between 40 km/h

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

ASCD: Operating

ASCD: Not operating

OFF

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle
• Battery: Fully charged*

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

Approx. 2,600 - 3,500 mV

MONITOR ITEM

CONDITION

SPECIFICATION

2011 Pathfinder

ECM

EC-541

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

*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:0000000006244626

ECM Terminal and Reference Value

INFOID:0000000006244627

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-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.

ALT DUTY SIG

• Power generation voltage variable control: Operating

• Power generation voltage variable control: Not operating

OFF

HO2 S2 DIAG2 (B1)

NOTE:

The item is indicated, but not used.

—

HO2 S2 DIAG2 (B2)

NOTE:

The item is indicated, but not used.

—

MONITOR ITEM

CONDITION

SPECIFICATION

PBIB3368E

BBIA0386E

2011 Pathfinder

Content .. 308 309 310 311 ..