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Nissan Pathfinder (2011 year). Manual - part 269

EC-206

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0222, P0223 TP SENSOR

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

EC-97, "Ground Inspection"

OK or NG

>> GO TO 2.

>> Repair or replace ground connections.

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

>> GO TO 7.

>> GO TO 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

>> GO TO 4.

>> Repair open circuit.

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

Electric throttle control actuator terminal 2

EC-452

APP sensor terminal 1

2011 Pathfinder

P0222, P0223 TP SENSOR

EC-207

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

OK or NG

>> GO TO 5.

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

CHECK APP SENSOR

Refer to

EC-375, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to

ACC-4, "Removal and Installation"

INSPECTION END

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

>> GO TO 8.

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

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

>> GO TO 9.

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

CHECK THROTTLE POSITION SENSOR

Refer to

EC-207, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 10.

10.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace the electric throttle control actuator. Refer to

EM-27, "Removal and Installation"

INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to

GI-37, "Intermittent Incident"

INSPECTION END

Component Inspection

INFOID:0000000006243903

THROTTLE POSITION SENSOR

Continuity should exist.

2011 Pathfinder

EC-208

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0222, P0223 TP 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. Refer to

EM-27,

"Removal and Installation"

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

2011 Pathfinder

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

EC-209

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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

On Board Diagnosis Logic

INFOID:0000000006243904

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:0000000006243905

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.
2. Start engine and warm it up to normal operating temperature.

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-

• 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.

2011 Pathfinder

EC-210

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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

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-210, "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:0000000006243906

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

>> GO TO 2.

>> Discover air leak location and repair.

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.

>> Repair or replace it.

PERFORM POWER BALANCE TEST

With CONSULT-III

Engine speed

Engine speed in the freeze frame data

400 rpm

Basic fuel schedule

Basic fuel schedule in freeze frame data

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

2011 Pathfinder

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

EC-211

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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.

>> GO TO 10.

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

>> GO TO 5.

>> Perform trouble diagnosis for FUEL INJECTOR, refer to

EC-399, "Diagnosis Procedure"

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.

OK or NG

: Vacuum tank

: Front

AWBIA0686ZZ

Voltage: Battery voltage

Cylinder

Harness connector F44

terminal

ECM terminal

Continuity should exist.

PBIB2633E

Cylinder

Harness connector F201 terminal

(+)

(–)

Operating sound should exist.

PBIB2634E

2011 Pathfinder

EC-212

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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

>> GO TO 6.

>> Perform trouble diagnosis for FUEL INJECTOR, refer to

EC-399, "Diagnosis Procedure"

CHECK FUNCTION OF FUEL INJECTOR-III

1. Reconnect all harness connector disconnected.

2. Start engine.

3. Listen to fuel injectors No. 2, No. 4, No.6 operating sound.

OK or NG

>> GO TO 7.

>> Perform trouble diagnosis for FUEL INJECTOR, refer to

EC-399, "Diagnosis Procedure"

CHECK FUNCTION OF IGNITION COIL-I

CAUTION:

Perform the following procedure in a place with no combustible objects and good ventilation.

1. Turn ignition switch OFF.

2. Remove fuel pump fuse (No.48) in IPDM E/R to release fuel

pressure.

NOTE:

Do not use CONSULT-III to release fuel pressure, or fuel pres-

sure applies again during the following procedure.

3. Start engine.

4. After engine stalls, crank it two or three times to release all fuel

pressure.

5. Turn ignition switch OFF.

6. Remove all ignition coil harness connectors to avoid the electri-

cal discharge from the ignition coils.

7. Remove ignition coil and spark plug of the cylinder to be

checked. Refer to

EM-42, "Removal and Installation"

8. Crank engine for five seconds or more to remove combustion gas in the cylinder.

9. Connect spark plug and harness connector to ignition coil.

10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -

0.66 in) between the edge of the spark plug and grounded metal

portion as shown in the figure.

11. Crank engine for about three seconds, and check whether spark

is generated between the spark plug and the grounded metal

portion.

CAUTION:

• Never place to the spark plug and the ignition coil within

50cm (19.7 in) each other. Be careful not to get an electri-

cal shock while checking, because the electrical dis-

charge voltage becomes 20 kV or more.

• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.

NOTE:

When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-

functioning.

OK or NG

>> GO TO 11.

>> GO TO 8.

CHECK FUNCTION OF IGNITION COIL-II

1. Turn ignition switch OFF.

Clicking noise should exist.

PBIB1986E

Spark should be generated.

BBIA0534E

JMBIA0066GB

2011 Pathfinder

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

EC-213

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

2. Disconnect spark plug and connect a known-good spark plug.

3. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug

and the grounded metal portion.

OK or NG

>> GO TO 9.

>> Check ignition coil, power transistor and their circuits. Refer to

EC-407, "Diagnosis Procedure"

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.
OK or NG

>> Replace spark plug(s) with standard type one(s). For

spark plug type, refer to

EM-17, "Removal and Installa-

tion"

>> 1. Repair or clean spark plug.

2. GO TO 10.

10.

CHECK FUNCTION OF IGNITION COIL-III

1. Reconnect the initial spark plugs.

2. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug

and the grounded portion.

OK or NG

INSPECTION END

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to

EM-17, "Removal

and Installation"

11.

CHECK COMPRESSION PRESSURE

Check compression pressure. Refer to

EM-23, "Compression Pressure"

OK or NG

>> GO TO 12.

>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.

12.

CHECK FUEL PRESSURE

1. Install all removed parts.

2. Release fuel pressure to zero. Refer to

EC-484, "Fuel Pressure Check"

3. Install fuel pressure gauge and check fuel pressure. Refer to

EC-484, "Fuel Pressure Check"

OK or NG

>> GO TO 14.

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.

• Fuel pump and circuit (Refer to

EC-399, "Diagnosis Procedure"

• Fuel pressure regulator (Refer to

EC-484, "Fuel Pressure Check"

• Fuel lines

• Fuel filter for clogging

>> Repair or replace.

Spark should be generated.

SEF156I

Spark should be generated.

At idle: Approx. 350 kPa (3.57 kg/cm

, 51 psi)

2011 Pathfinder

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