Nissan Pathfinder (2006 year). Manual — part 162
DTC U1000, U1001 CAN COMMUNICATION LINE
EC-155
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2006 Pathfinder
Diagnostic Procedure
UBS00K4T
Go to
EC-156
DTC U1010 CAN COMMUNICATION
2006 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-157, "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
Initializing CAN communication bus is mal-
functioning.
●
ECM
SEF058Y
DTC U1010 CAN COMMUNICATION
EC-157
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2006 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-156, "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-156, "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-102, "ECM Re-communicating Function"
3.
Perform
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
EC-158
DTC P0011, P0021 IVT CONTROL
2006 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*
PBIB1102E
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%
DTC P0011, P0021 IVT CONTROL
EC-159
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2006 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-179, "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-160, "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-160, "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
70 - 105
°
C (158 - 221
°
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
EC-160
DTC P0011, P0021 IVT CONTROL
2006 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
.
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
EC-161, "Component Inspection"
OK or NG
OK
>> GO TO 3.
NG
>> Replace intake valve timing control solenoid valve.
3.
CHECK CRANKSHAFT POSITION SENSOR (POS)
EC-365, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace crankshaft position sensor (POS).
4.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
EC-374, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace 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
DTC P0011, P0021 IVT CONTROL
EC-161
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EC
2006 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
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-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
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
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
EC-162
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
2006 Pathfinder
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
PFP:22693
Description
UBS00KBG
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element at the specified range.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KBH
Specification data are reference values.
On Board Diagnosis Logic
UBS00KBI
DTC Confirmation Procedure
UBS00KBJ
NOTE:
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 10.5V and 16V at
idle.
With CONSULT-II
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Start engine and let it idle for at least 10 seconds.
3.
If 1st trip DTC is detected, go to
EC-167, "Diagnostic Procedure"
.
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Air fuel ratio (A/F) sensor 1
heater control
Air fuel ratio (A/F) sensor 1 heater
Mass air flow sensor
Amount of intake air
MONITOR ITEM
CONDITION
SPECIFICATION
A/F S1 HTR (B1)
A/F S1 HTR (B2)
●
Engine: After warming up, idle the engine
0 - 100%
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0031
0031
(Bank 1)
Air fuel ratio (A/F) sensor
1 heater control circuit
low
The current amperage in the A/F sensor 1 heater
circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the A/F sensor 1 heater.)
●
Harness or connectors
(The A/F sensor 1 heater circuit is
open or shorted.)
●
A/F sensor 1 heater
P0051
0051
(Bank 2)
P0032
0032
(Bank 1)
Air fuel ratio (A/F) sensor
1 heater control circuit
high
The current amperage in the A/F sensor 1 heater
circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM
through the A/F sensor 1 heater.)
●
Harness or connectors
(The A/F sensor 1 heater circuit is
shorted.)
●
A/F sensor 1 heater
P0052
0052
(Bank 2)
SEF058Y
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