Nissan Pathfinder (2009 year). Manual - part 273

EC-198

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0182, P0183 FTT SENSOR

NG

>> Replace fuel level sensor unit.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-49, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004297386

FUEL TANK TEMPERATURE SENSOR

1.

Remove fuel level sensor unit.

2.

Check resistance between “fuel level sensor unit and fuel pump”
terminals 3 and 4 by heating with hot water or heat gun as
shown in the figure.

Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68)

2.3 - 2.7

50 (122)

0.79 - 0.90

SEF476YA

2009 Pathfinder

P0222, P0223 TP SENSOR

EC-199

< COMPONENT DIAGNOSIS >

[VQ40DE]

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P0222, P0223 TP SENSOR

Component Description

INFOID:0000000004297387

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.

On Board Diagnosis Logic

INFOID:0000000004297388

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates.

DTC Confirmation Procedure

INFOID:0000000004297389

NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

4.

Start engine and let it idle for 1 second.

5.

Check DTC.

6.

If DTC is detected, go to 

EC-199, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004297390

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0222
0222

Throttle position sensor 
1 circuit low input

An excessively low voltage from the TP sensor 
1 is sent to ECM.

• Harness or connectors

(The TP sensor 1 circuit is open or short-
ed.)
(The APP sensor 2 circuit is shorted.)

• Electric throttle control actuator

(TP sensor 1)

• Accelerator pedal position sensor.

(APP sensor 2)

P0223
0223

Throttle position sensor 
1 circuit high input

An excessively high voltage from the TP sensor 
1 is sent to ECM.

Engine operation condition in fail-safe mode

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.
So, the acceleration will be poor. 

2009 Pathfinder

EC-200

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0222, P0223 TP SENSOR

2.

Loosen and retighten three ground screws on the body. Refer to 

EC-95, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between electric throttle control actuator terminal
2 and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 47.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit.

4.

CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-III

Check harness for short to power and short to ground, between the following terminals.

BBIA0539E

BBIA0543E

Voltage: Approximately 5V

PBIB2604E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

47

Electric throttle control actuator terminal 2

EC-433

91

APP sensor terminal 1

2009 Pathfinder

P0222, P0223 TP SENSOR

EC-201

< COMPONENT DIAGNOSIS >

[VQ40DE]

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EC

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OK or NG

OK

>> GO TO 5.

NG

>> Repair short to ground or short to power in harness or connectors.

5.

CHECK APP SENSOR

Refer to 

EC-371, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 6.

6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform 

EC-25, "Accelerator Pedal Released Position Learning"

.

3.

Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

4.

Perform 

EC-25, "Idle Air Volume Learning"

.

>> INSPECTION END

7.

CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 66.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.

CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 1.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 9.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

9.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-202, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-25, "Idle Air Volume Learning"

.

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to

GI-49, "Intermittent Incident"

.

Continuity should exist.

Continuity should exist.

2009 Pathfinder

EC-202

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0222, P0223 TP SENSOR

>> INSPECTION END

Component Inspection

INFOID:0000000004297391

THROTTLE POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

3.

Turn ignition switch ON.

4.

Set selector lever to D position. 

5.

Check voltage between ECM terminals 50 (TP sensor 1 signal),
69 (TP sensor 2 signal) and ground under the following condi-
tions.

6.

If NG, replace electric throttle control actuator and go to the next
step.

7.

Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

8.

Perform 

EC-25, "Idle Air Volume Learning"

.

Terminal

Accelerator pedal

Voltage

50
(Throttle position sensor 1)

Fully released

More than 0.36V

Fully depressed

Less than 4.75V

69
 (Throttle position sensor 2)

Fully released

Less than 4.75V

Fully depressed

More than 0.36V

PBIB1608E

2009 Pathfinder

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE

EC-203

< COMPONENT DIAGNOSIS >

[VQ40DE]

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P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MIS-
FIRE

On Board Diagnosis Logic

INFOID:0000000004297392

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.

The misfire detection logic consists of the following two conditions.
1.

One Trip Detection Logic (Three Way Catalyst Damage)
On the first trip, when a misfire condition occurs that can damage the three way catalyst (TWC) due to
overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.

2.

Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected in any one cylinder or in multiple cylinders.

DTC Confirmation Procedure

INFOID:0000000004297393

CAUTION:

Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

 WITH CONSULT-III

1.

Turn ignition switch ON, and select “DATA MONITOR” mode with CONSULT-III.

Sensor

Input Signal to ECM

ECM function

Crankshaft position sensor (POS)

Engine speed

On board diagnosis of misfire

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0300
0300

Multiple cylinder misfire 
detected

Multiple cylinder misfires.

• Improper spark plug
• Insufficient compression
• Incorrect fuel pressure
• The fuel injector is open or shorted
• Fuel injector
• Intake air leak
• The ignition signal circuit is open or short-

ed

• Lack of fuel
• Signal plate
• Air fuel ratio (A/F) sensor 1
• Incorrect PCV hose connection

P0301
0301

No.1 cylinder misfire de-
tected

No. 1 cylinder misfires.

P0302
0302

No. 2 cylinder misfire 
detected

No. 2 cylinder misfires.

P0303
0303

No. 3 cylinder misfire 
detected

No. 3 cylinder misfires.

P0304
0304

No. 4 cylinder misfire 
detected

No. 4 cylinder misfires.

P0305
0305

No. 5 cylinder misfire 
detected

No. 5 cylinder misfires.

P0306
0306

No. 6 cylinder misfire 
detected

No. 6 cylinder misfires.

2009 Pathfinder

EC-204

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE

2.

Start engine and warm it up to normal operating temperature.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Restart engine and let it idle for about 15 minutes.

7.

Check 1st trip DTC.

8.

If 1st trip DTC is detected, go to 

EC-204, "Diagnosis Procedure"

.

NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.

a.

Turn ignition switch OFF and wait at least 10 seconds.

b.

Turn ignition switch ON.

c.

Turn ignition switch OFF and wait at least 10 seconds.

d.

Start engine and drive the vehicle under similar conditions to (1st trip) Freeze Frame Data for a certain
time. Refer to the table below.
Hold the accelerator pedal as steady as possible.

Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.

Driving time varies according to the engine speed in the freeze frame data.

 WITH GST

Follow the procedure “WITH CONSULT-III” above.

Diagnosis Procedure

INFOID:0000000004352004

1.

CHECK FOR INTAKE AIR LEAK AND PCV HOSE

1.

Start engine and run it at idle speed.

2.

Listen for the sound of the intake air leak.

3.

Check PCV hose connection.

OK or NG

OK

>> GO TO 2.

NG

>> Discover air leak location and repair.

2.

CHECK FOR EXHAUST SYSTEM CLOGGING

Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.

OK or NG

OK (With CONSULT-III)>>GO TO 3.
OK (Without CONSULT-III)>>GO TO 4.
NG

>> Repair or replace it.

3.

PERFORM POWER BALANCE TEST

Engine speed

Engine speed in the freeze frame data 

±

 400 rpm

Basic fuel schedule

Basic fuel schedule in freeze frame data 

×

 (1

±

 0.1)

Engine coolant temperature (T) 
condition

When the freeze frame data shows lower than 70 

°

C (158 

°

F),

T should be lower than 70 

°

C (158 

°

F).

When the freeze frame data shows higher than or equal to 70 

°

C (158 

°

F),

T should be higher than or equal to 70 

°

C (158 

°

F).

Engine speed

Time

Around 1,000 rpm

Approximately 10 minutes

Around 2,000 rpm

Approximately 5 minutes

More than 3,000 rpm

Approximately 3.5 minutes

2009 Pathfinder

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE

EC-205

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

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F

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EC

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 With CONSULT-III

1.

Perform “POWER BALANCE” in “ACTIVE TEST” mode.

2.

Is there any cylinder which does not produce a momentary engine speed drop?

Yes or No

Yes

>> GO TO 4.

No

>> GO TO 10.

4.

CHECK FUNCTION OF FUEL INJECTOR-I

Stop engine.
1.

Disconnect harness connector F44 (3), F201 (1)

2.

Turn ignition switch ON.

3.

Check voltage between harness connector F44 terminal 3 and
ground with CONSULT-III or tester.

4.

Turn ignition switch OFF.

5.

Disconnect ECM harness connector.

6.

Check harness continuity between harness connector F44 and
ECM as follows.
Refer to Wiring Diagram.

7.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

>> Perform trouble diagnosis for FUEL INJECTOR, refer to 

EC-394, "Diagnosis Procedure"

.

5.

CHECK FUNCTION OF FUEL INJECTOR-II

Provide battery voltage between harness connector F201 as follows
and then interrupt it. Listen to each fuel injector operating sound.

2

: Vacuum tank

: Front

AWBIA0686ZZ

Voltage: Battery voltage

Cylinder

Harness connector F44 

terminal

ECM terminal

1

2

23

3

1

22

5

4

21

Continuity should exist.

PBIB2633E

Cylinder

Harness connector F201 terminal

(+)

(–)

1

3

2

3

3

1

5

3

4

Operating sound should exist.

PBIB2634E

2009 Pathfinder