Nissan Qashqai J11. Manual — part 680
U1000 CAN COMM CIRCUIT
TM-295
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
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U1000 CAN COMM CIRCUIT
Description
INFOID:0000000010589282
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 malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independently). In CAN communication, control units are con-
nected 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:0000000010589283
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine and wait for at least 5 seconds.
2.
Check the DTC.
Is “U1000” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010589284
For the diagnosis procedure, refer to
LAN-24, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U1000
CAN COMM CIRCUIT
(CAN Communication Line)
When the ignition switch is ON, TCM cannot
send the CAN communication signal continu-
ously for 2 seconds or more.
Harness or connector
(CAN communication line is open or
shorted)
TM-296
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
U110F LOST COMMUNICATION (ECM)
U110F LOST COMMUNICATION (ECM)
DTC Logic
INFOID:0000000010589285
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.
Start the engine and wait for at least 5 seconds.
2.
Check the DTC.
Is “U110F” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010589286
For the diagnosis procedure, refer to
LAN-24, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U110F
LOST COMM (ECM)
(Lost Communication With
ECM)
When the ignition switch is ON, TCM is unable
to receive the CAN communications signal
from ECM continuously for 2 seconds or more.
• ECM
• Harness or connector
(CAN communication line is open or
shorted)
U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)
TM-297
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
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U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)
DTC Logic
INFOID:0000000010589287
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.
Start the engine and wait for at least 5 seconds.
2.
Check the DTC.
Is “U1111” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010589288
For the diagnosis procedure, refer to
LAN-24, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U1111
LOST COMM (CHASSIS
CONT MDUL)
(Lost Communication With
Chassis Control Module)
When the ignition switch is ON, TCM is unable
to receive the CAN communications signal
from chassis control module continuously for 2
seconds or more.
• Chassis control module
• Harness or connector
(CAN communication line is open or
shorted)
TM-298
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
U1117 LOST COMMUNICATION (ABS)
U1117 LOST COMMUNICATION (ABS)
DTC Logic
INFOID:0000000010589289
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.
Start the engine and wait for 5 seconds or more.
2.
Check the DTC.
Is “U1117” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010589290
For the diagnosis procedure, refer to
LAN-24, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U1117
LOST COMM (ABS)
(Lost Communication With
ABS)
When the ignition switch is ON, TCM is unable
to receive the CAN communications signal
from ABS actuator and electric unit (control
unit) continuously for 2 seconds or more.
• ABS actuator and electric unit (control
unit)
• Harness or connector
(CAN communication line is open or
shorted)
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