Nissan X-Trail 32. Instruction — part 1996
STC-34
< DTC/CIRCUIT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
U1000 CAN COMM CIRCUIT
DTC Description
INFOID:0000000010688426
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 communicate data but selectively reads required data only.
DTC DETECTION LOGIC
POSSIBLE CAUSE
• CAN communication error
FAIL-SAFE
System continue normal control.
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.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS/DAST 3” self-diagnosis.
Is DTC “U1000” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010688427
LAN-17, "Trouble Diagnosis Flow Chart"
DTC
Display item
(Trouble diagnosis content)
Malfunction detected condition
U1000
CAN COMM CIRCUIT
(CAN communication circuit)
EPS control unit is not transmitting/receiving CAN communi-
cation signal for 2 seconds or more.
U1010 CONTROL UNIT (CAN)
STC-35
< DTC/CIRCUIT DIAGNOSIS >
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STC
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U1010 CONTROL UNIT (CAN)
DTC Description
INFOID:0000000010688428
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
2communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wir-
ing. Each control unit communicate data but selectively reads required data only.
DTC DETECTION LOGIC
POSSIBLE CAUSE
• EPS control unit (steering column assembly)
FAIL-SAFE
System continue normal control.
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.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS/DAST 3” self-diagnosis.
Is DTC “U1010” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010688429
1.
CHECK SELF-DIAGNOSIS RESULTS
Check that there is no malfunction in EPS control unit harness connector or disconnection.
Is the inspection result normal?
YES
>> Replace steering column assembly. Refer to
ST-13, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC
Display item
(Trouble diagnosis content)
Malfunction detected condition
U1010
CONTROL UNIT (CAN)
(Control unit [CAN communication])
When detecting error during the initial diagnosis of CAN control-
ler to EPS control unit.
STC-36
< DTC/CIRCUIT DIAGNOSIS >
U1970 AROUND VIEW MONITOR SYSTEM
U1970 AROUND VIEW MONITOR SYSTEM
DTC Description
INFOID:0000000010688430
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connector
(CAN communication line)
• EPS control unit (steering column assembly)
• Around view monitor control unit
FAIL-SAFE
Around view monitor with park assist function stops (controlled by around view monitor).
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.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS/DAST 3” self-diagnosis.
Is DTC “U1970” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010688431
1.
CHECK AROUND VIEW MONITOR CONTROL UNIT
1.
Turn ignition switch OFF.
2.
Disconnect around view monitor control unit harness connector.
3.
Check the around view monitor control unit pin terminals (CAN communication lines) for damage or loose
connection with harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Recheck terminals for damage or loose connection. Refer to
LAN-7, "Precautions for Harness
2.
PERFORM SELF-DIAGNOSIS (AROUND VIEW MONITOR CONTROL UNIT)
With CONSULT
1.
Connect around view monitor control unit harness connector.
2.
Connect EPS control unit harness connector.
3.
Erase self-diagnostic results for “AVM”.
4.
Turn the ignition switch OFF, and then wait 10 seconds and more.
5.
Turn the ignition switch ON.
6.
Perform self-diagnosis for “AVM”.
Is any DTC detected?
DTC
Display item
(Trouble diagnosis content)
Malfunction detected condition
U1970
AROUND VIEW MONITOR
(Around view monitor)
CAN communication signal of around view monitor control unit is abnormal for
2 consecutive seconds or more.
U1970 AROUND VIEW MONITOR SYSTEM
STC-37
< DTC/CIRCUIT DIAGNOSIS >
C
D
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STC
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YES
>> Check the DTC. Refer to
NO
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS
With CONSULT
1.
Erase self-diagnostic results for “EPS/DAST 3”.
2.
Turn the ignition switch OFF, and then wait 10 seconds and more.
3.
Turn the ignition switch ON.
4.
Perform the self-diagnosis of all systems.
Is DTC “U1000”,“U1970” or other DTC detected?
LAN-17, "Trouble Diagnosis Flow Chart"
.
YES (“U1970”)>>Replace around view monitor control unit. Refer to
AV-268, "Removal and Installation"
.
YES (Other DTC)>>Check the DTC.
NO
>> INSPECTION END
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