Nissan Pathfinder (2010 year). Instruction - part 295

EC-452

< ECU DIAGNOSIS >

[VQ40DE]

ECM

ABBIA0428GB

2010 Pathfinder

ECM

EC-453

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ABBIA0429GB

2010 Pathfinder

EC-454

< ECU DIAGNOSIS >

[VQ40DE]

ECM

ABBIA0430GB

2010 Pathfinder

ECM

EC-455

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ABBIA0431GB

2010 Pathfinder

EC-456

< ECU DIAGNOSIS >

[VQ40DE]

ECM

ABBIA0432GB

2010 Pathfinder

ECM

EC-457

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ABBIA0433GB

2010 Pathfinder

EC-458

< ECU DIAGNOSIS >

[VQ40DE]

ECM

Fail-Safe Chart

INFOID:0000000005257460

When the DTC listed below is detected, the ECM enters the fail-safe mode and the MIL illuminates.

ABBIA0154GB

2010 Pathfinder

ECM

EC-459

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

• When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there

is malfunction on engine control system.

Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected

as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by

means of operating fail-safe function.

The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the

driver to repair the malfunction.

DTC No.

Detected items

Engine operating condition in fail-safe mode

P0102
P0103

Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

P0117
P0118

Engine coolant tempera-
ture sensor circuit

Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided 

(CONSULT-III display)

Just as ignition switch is turned ON 
or START

40

°

C (104

°

F)

Approx. 4 minutes after engine 
starting

80

°

C (176

°

F)

Except as shown above

40 - 80

°

C (104 - 176

°

F)

(Depends on the time)

When the fail-safe system for engine coolant temperature sensor is activated, the cooling 
fan operates while engine is running.

P0122
P0123
P0222
P0223
P2135

Throttle position sensor

The ECM controls the electric throttle control actuator in regulating the throttle opening in 
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal 
condition.
Therefore, the acceleration will be poor. 

P0643

Sensor power supply

ECM stops the electric throttle control actuator control, throttle valve is maintained at a 
fixed opening (approx. 5 degrees) by the return spring.

P2100
P2103

Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a 

fixed opening (approx. 5 degrees) by the return spring.

P2101

Electric throttle control 
function

ECM stops the electric throttle control actuator control, throttle valve is maintained at a 
fixed opening (approx. 5 degrees) by the return spring.

P2118

Throttle control motor

ECM stops the electric throttle control actuator control, throttle valve is maintained at a 
fixed opening (approx. 5 degrees) by the return spring.

P2119

Electric throttle control ac-
tuator

(When electric throttle control actuator does not function properly due to the return spring 
malfunction:)
ECM controls the electric throttle actuator because of  regulating the throttle opening 
around the idle position. The engine speed will not rise more than 2,000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20 
degrees or less.

(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driven, it slows down gradually by fuel cut. After the vehicle 
stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or 
more.

P2122
P2123
P2127
P2128
P2138

Accelerator pedal position 
sensor

The ECM controls the electric throttle control actuator in regulating the throttle opening in 
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal 
condition.
Therefore, the acceleration will be poor. 

Engine operating condition in fail-safe mode

Engine speed will not rise more than 2,500 rpm due to the fuel cut

2010 Pathfinder