Nissan Frontier. Manual — part 631
U0101 CAN COMM CIRCUIT
EC-1095
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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U0101 CAN COMM CIRCUIT
Description
INFOID:0000000009481729
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:0000000009481730
*1: This self-diagnosis has the one trip detection logic (A/T)
DTC Confirmation Procedure
INFOID:0000000009481731
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
EC-1095, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009481732
Go to
LAN-53, "CAN System Specification Chart"
.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
U0101*
1
0101*
1
Lost communication
with TCM
• When ECM is not transmitting or receiving
CAN communication signal of OBD (emission-
related diagnosis) with TCM for 2 seconds or
more.
• CAN communication line between TCM
and ECM
• CAN communication line is open or short-
ed
EC-1096
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
U1001 CAN COMM CIRCUIT
U1001 CAN COMM CIRCUIT
Description
INFOID:0000000009481733
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:0000000009481734
The MIL will not illuminate for this diagnosis.
DTC Confirmation Procedure
INFOID:0000000009481735
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
EC-1096, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009481736
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)
P0011, P0021 IVT CONTROL
EC-1097
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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P0011, P0021 IVT CONTROL
On Board Diagnosis Logic
INFOID:0000000009481737
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
INFOID:0000000009481738
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
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds 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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10 V and 16 V at
idle.
WITH CONSULT
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.
2. Start engine and warm it up to the normal operating temperature.
3. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady
as possible.
4. Stop vehicle with engine running and let engine idle for 10 seconds.
5. Check 1st trip DTC.
6. If the 1st trip DTC is detected, go to
EC-1098, "Diagnosis Procedure"
.
If the 1st trip DTC is not detected, go to next step.
7. Maintain the following conditions for at least 20 consecutive seconds.
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 in-
take 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)
EC-1098
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P0011, P0021 IVT CONTROL
8. Check 1st trip DTC.
9. If the 1st trip DTC is detected, go to
EC-1098, "Diagnosis Procedure"
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481739
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-1099, "Component Inspection"
.
OK or NG
OK
>> GO TO 3.
NG
>> Replace malfunctioning intake valve timing control solenoid valve. Refer to
3.
CHECK CRANKSHAFT POSITION SENSOR (POS)
EC-1198, "Component Inspection"
.
OK or NG
OK
>> GO TO 4.
NG
>> Replace crankshaft position sensor (POS). Refer to
4.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
EC-1203, "Component Inspection"
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace malfunctioning 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. Refer to
.
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.)
PBIA8559J
SEC905C
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