Nissan Frontier. Instruction — part 395
U1001 CAN COMM CIRCUIT
EC-151
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
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EC
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U1001 CAN COMM CIRCUIT
Description
INFOID:0000000009480778
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
INFOID:0000000009480779
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
INFOID:0000000009480780
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000009480781
Go to
LAN-53, "CAN System Specification Chart"
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1001
1001
CAN communication line
When ECM is not transmitting or receiving CAN
communication signal other than OBD (emission
related diagnosis) for 2 seconds or more.
• Harness or connectors
(CAN communication line is open or
shorted)
EC-152
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0011 IVT CONTROL
P0011 IVT CONTROL
On Board Diagnosis Logic
INFOID:0000000009480782
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
INFOID:0000000009480783
CAUTION:
Always drive at a safe speed.
NOTE:
• If DTC P0011 is displayed with DTC P0075, first perform trouble diagnosis for DTC P0075. Refer to
.
• 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
1. Start engine and warm it up to the normal operating temperature.
2. Maintain the following conditions for at least 10 consecutive seconds.
Hold the accelerator pedal as steady as possible.
3. Stop vehicle with engine running and let engine idle for 10 seconds.
4. Check 1st trip DTC.
5. If the 1st trip DTC is detected, go to
.
If the 1st trip DTC is not detected, go to next step.
6. Maintain the following conditions for at least 20 consecutive seconds.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0011
0011
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 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 in-
take valve timing control
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 (A constant rotation is maintained.)
COOLAN TEMP/S
More than 60
°C (140°F)
B/FUEL SCHDL
More than 4.3 msec
Shift lever
P or N (A/T), Neutral (M/T)
ENG SPEED
1,700 - 3,175 rpm (A constant rotation is maintained.)
COOLAN TEMP/S
More than 65
°C (149°F)
Shift lever
1st or 2nd position
Driving location uphill
Driving vehicle uphill
(Increased engine load will help maintain the driving
conditions required for this test.)
P0011 IVT CONTROL
EC-153
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
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7. Check 1st trip DTC.
8. If the 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009480784
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.
NG
>> Go to
.
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
EC-154, "Component Inspection"
OK or NG
OK
>> GO TO 3.
NG
>> Replace intake valve timing control solenoid valve. Refer to
.
3.
CHECK CRANKSHAFT POSITION SENSOR (POS)
EC-260, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace crankshaft position sensor (POS). Refer to
4.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
EC-265, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace camshaft position sensor (PHASE). Refer to
.
5.
CHECK CAMSHAFT (INTAKE)
Check the following.
• Accumulation of debris on 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.
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
PBIA8559J
PBIB0565E
EC-154
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0011 IVT CONTROL
Yes
>> Check timing chain installation. Refer to
EM-46, "Removal and Installation"
.
No
>> GO TO 7.
7.
CHECK LUBRICATION CIRCUIT
EM-54, "Removal and Installation"
.
OK or NG
OK
>> GO TO 8.
NG
>> Clean lubrication line.
8.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009480785
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:
Never 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.
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
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