Nissan Pathfinder (2007 year). Manual - part 161

DTC U1000, U1001 CAN COMMUNICATION LINE

EC-155

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2007 Pathfinder

Wiring Diagram

UBS00K4S

BBWA2359E

EC-156

DTC U1000, U1001 CAN COMMUNICATION LINE

2007 Pathfinder

Diagnostic Procedure

UBS00K4T

Go to 

LAN-49, "CAN System Specification Chart"

 .

DTC U1010 CAN COMMUNICATION

EC-157

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2007 Pathfinder

DTC U1010 CAN COMMUNICATION

PFP:23710

Description

UBS00OZX

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

UBS00OZY

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

UBS00OZZ

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

If DTC is detected, go to 

EC-158, "Diagnostic Procedure"

  .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1010
1010

CAN communication bus

When detecting error during the initial diagno-
sis of CAN controller of ECM.

●

ECM

SEF058Y

EC-158

DTC U1010 CAN COMMUNICATION

2007 Pathfinder

Diagnostic Procedure

UBS00P00

1. 

INSPECTION START

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “SELF-DIAG RESULTS” mode with CONSULT-II.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

EC-157, "DTC Confirmation Procedure"

  .

5.

Is the DTC U1010 displayed again?

 With GST

1.

Turn ignition switch ON.

2.

Select “Service $04” with GST.

3.

Perform DTC Confirmation Procedure.
See 

EC-157, "DTC Confirmation Procedure"

  .

4.

Is the DTC U1010 displayed again?

Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

2. 

REPLACE ECM

1.

Replace ECM.

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

BL-96, "ECM Re-communicating Function"

  .

3.

Perform 

EC-76, "VIN Registration"

  .

4.

Perform 

EC-77, "Accelerator Pedal Released Position Learning"

  .

5.

Perform 

EC-77, "Throttle Valve Closed Position Learning"

  .

6.

Perform 

EC-77, "Idle Air Volume Learning"

  .

>> INSPECTION END

DTC P0011, P0021 IVT CONTROL

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2007 Pathfinder

DTC P0011, P0021 IVT CONTROL

PFP:23796

Description

UBS00K4U

SYSTEM DESCRIPTION

*: This signal is sent to the ECM through CAN communication line

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.

CONSULT-II Reference Value in Data Monitor Mode

UBS00K4V

Specification data are reference values.

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Intake valve 
timing control

Intake valve timing control 
solenoid valve

Camshaft position sensor (PHASE)

Engine coolant temperature sensor

Engine coolant temperature

Wheel sensor

Vehicle speed*

PBIB3279E

MONITOR ITEM

CONDITION

SPECIFICATION

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

°

 - 5

°

CA

2,000 rpm

Approx. 0

°

 - 30

°

CA

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%

EC-160

DTC P0011, P0021 IVT CONTROL

2007 Pathfinder

On Board Diagnosis Logic

UBS00K4W

FAIL-SAFE MODE

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

DTC Confirmation Procedure

UBS00K4X

CAUTION:

Always drive at a safe speed.

NOTE:

●

If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform trouble diagnosis for
DTC P0075 or P0081. Refer to 

EC-180, "DTC P0075, P0081 IVT CONTROL SOLENOID VALVE"

 .

●

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test. 

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10V and 16V at
idle.

 WITH CONSULT-II

1.

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

2.

Start engine and warm it up to the normal operating tempera-
ture.

3.

Maintain the following conditions for at least 6 consecutive sec-
onds. Hold the accelerator pedal as steady as possible.

4.

Stop vehicle with engine running and let engine idle for 10 seconds.

5.

If the 1st trip DTC is detected, go to

EC-161, "Diagnostic Procedure"

 . 

If the 1st trip DTC is not detected, go to next step. 

6.

Maintain the following conditions for at least 20 consecutive seconds.

7.

If the 1st trip DTC is detected, go to 

EC-161, "Diagnostic Procedure"

 .

DTC No.

Trouble diagnosis 

name

Detecting condition

Possible cause

P0011
0011
(Bank 1)

Intake valve timing 
control performance

There is a gap between angle of target and 
phase-control angle degree.

●

Crankshaft position sensor (POS)

●

Camshaft position sensor (PHASE)

●

Intake valve timing control solenoid valve

●

Accumulation of debris to the signal pick-up 
portion of the camshaft

●

Timing chain installation

●

Foreign matter caught in the oil groove for 
intake valve timing control

P0021
0021
(Bank 2)

Detected items

Engine operating condition in fail-safe mode

Intake valve timing control

The signal is not energized to the solenoid valve and the valve control does not function.

ENG SPEED

1,200 - 2,000 rpm

COOLAN TEMP/S

More than 60

°

C (140

°

F)

B/FUEL SCHDL

More than 3.5 msec

Selector lever

P or N position

ENG SPEED

1,700 - 3,175 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 70

°

C (158

°

F)

Selector lever

1st or 2nd position

Driving location uphill

Driving vehicle uphill
(Increased engine load will help maintain the driving 
conditions required for this test.)

SEF353Z

DTC P0011, P0021 IVT CONTROL

EC-161

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2007 Pathfinder

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

UBS00K4Y

1. 

CHECK OIL PRESSURE WARNING LAMP

1.

Start engine.

2.

Check oil pressure warning lamp and confirm it is not illumi-
nated.

OK or NG

OK

>> GO TO 2.

KG

>> Go to 

LU-8, "OIL PRESSURE CHECK"

 .

2. 

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-162, "Component Inspection"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Replace malfunctioning intake valve timing control solenoid valve.

3. 

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-361, "Component Inspection"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Replace crankshaft position sensor (POS).

4. 

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-370, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace malfunctioning camshaft position sensor (PHASE).

5. 

CHECK CAMSHAFT (INTAKE)

Check the following.

●

Accumulation of debris to the signal plate of camshaft rear end

●

Chipping signal plate of camshaft rear end

OK or NG

OK

>> GO TO 6.

NG

>> Remove debris and clean the signal plate of camshaft

rear end or replace camshaft.

PBIA8559J

SEC905C

EC-162

DTC P0011, P0021 IVT CONTROL

2007 Pathfinder

6. 

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?

Yes or No

Yes

>> Check timing chain installation. Refer to 

EM-55, "TIMING CHAIN"

 .

No

>> GO TO 7.

7. 

CHECK LUBRICATION CIRCUIT

Refer to 

EM-83, "Inspection of Camshaft Sprocket (INT) Oil Groove"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Clean lubrication line.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

For Wiring Diagram, refer to 

EC-357

    for CKP sensor (POS) and 

EC-364

    for CMP sensor (PHASE).

>> INSPECTION END

Component Inspection

UBS00K4Z

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

1.

Disconnect intake valve timing control solenoid valve harness connector.

2.

Check resistance between intake valve timing control solenoid
valve as follows.

If NG, replace intake valve timing control solenoid valve.
If OK, go to next step.

3.

Remove intake valve timing control solenoid valve.

4.

Provide 12V DC between intake valve timing control solenoid
valve terminals and then interrupt it. Make sure that the plunger
moves as shown in the figure.

CAUTION:

Do not apply 12V DC continuously for 5 seconds or more.
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
If NG, replace intake valve timing control solenoid valve.

NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.

Removal and Installation

UBS00K50

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EM-55, "TIMING CHAIN"

 .

Terminal

Resistance

1 and 2

7.0 - 7.7

Ω

 at 20

°

C (68

°

F)

1 or 2 and ground

∞Ω

(Continuity should not exist.)

PBIB0193E

PBIB2275E