Nissan Altima L32. Instruction — part 257
U0140 CAN COMM CIRCUIT
EC-149
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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U0140 CAN COMM CIRCUIT
Description
INFOID:0000000004529332
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.
DTC Logic
INFOID:0000000004351807
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
Is DTC detected?
YES
>>
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004529333
LAN-16, "Trouble Diagnosis Flow Chart"
.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
U0140
Lost communication
with BCM
When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission related diagno-
sis) with BCM for 2 seconds or more.
• CAN communication line between
BCM and ECM
(CAN communication line is open or
shorted)
EC-150
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
U1001 CAN COMM CIRCUIT
U1001 CAN COMM CIRCUIT
Description
INFOID:0000000004529334
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.
DTC Logic
INFOID:0000000004468211
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>>
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004529335
Go to
LAN-16, "Trouble Diagnosis Flow Chart"
.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
U1001
CAN communication
line
When ECM is not transmitting or receiving CAN com-
munication signal other than OBD (emission related
diagnosis) for 2 seconds or more.
• Harness or connectors
(CAN communication line is open or
shorted)
P0011 IVT CONTROL
EC-151
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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P0011 IVT CONTROL
DTC Logic
INFOID:0000000004349193
DTC DETECTION LOGIC
NOTE:
If DTC P0011 is displayed with DTC P0075, first perform the trouble diagnosis for
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
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.
CAUTION:
Always drive at a safe speed.
4. Stop vehicle with engine running and let engine idle for 10 seconds.
5. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-II
With CONSULT-III
1. Maintain the following conditions for at least 20 consecutive seconds.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0011
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
ENG SPEED
1,200 - 2,000 rpm
COOLAN TEMP/S
More than 60
°C (140°F)
B/FUEL SCHDL
More than 3.5 msec
Shift lever
D position (CVT)
5th position (M/T)
EC-152
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
P0011 IVT CONTROL
CAUTION:
Always drive at a safe speed.
2. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004349194
1.
CHECK OIL PRESSURE WARNING LAMP
1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illumi-
nated.
Is oil pressure warning lamp illuminated?
YES
>> Go to
.
NO
>> GO TO 2.
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
EC-153, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace intake valve timing control solenoid valve.
3.
CHECK CRANKSHAFT POSITION SENSOR (POS)
EC-281, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace crankshaft position sensor (POS).
4.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
EC-284, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace camshaft position sensor (PHASE).
5.
CHECK CAMSHAFT (INTAKE)
Check the following.
ENG SPEED
1,700 - 3,175 rpm (A constant rotation is maintained.)
COOLAN TEMP/S
More than 70
°C (221°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.)
PBIA8559J
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