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![NISSAN X-TRAIL 2003 Electronic Repair Manual CAN SYSTEM (FOR A/T MODELS)
LAN-9
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CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control un NISSAN X-TRAIL 2003 Electronic Repair Manual CAN SYSTEM (FOR A/T MODELS)
LAN-9
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CHECK SHEET RESULTS (EXAMPLE)
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CAN SYSTEM (FOR A/T MODELS)
LAN-9
[CAN]
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CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
INSPECTION
Proceed trouble diagnosis according to the check sheet results (example).
Case 1:Replace ECM.
Case 2:Replace TCM.
Case 3:Check CAN communication Circuit. Refer toLAN-9, "
CAN Communication Circuit Check"
CAN Communication Circuit CheckEKS002AH
1.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check following terminals and connector for damage, bend and loose connection. (control module-side
and harness-side)
lTCM.
lECM.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2.CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect ECM connector and TCM connector.
2. Check continuity between ECM harness connector F43 termi-
nals 33 (B/W) and 34(L/R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness between ECM and TCM.
SKIA0887E
33(B/W) – 34(L/R) : Continuity should not exist.
SKIA0888E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual LAN-10
[CAN]
CANSYSTEM(FORA/TMODELS)
3.CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector F43 terminals
33(B/W), 34 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair h NISSAN X-TRAIL 2003 Electronic Repair Manual LAN-10
[CAN]
CANSYSTEM(FORA/TMODELS)
3.CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector F43 terminals
33(B/W), 34 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair h](/manual-img/5/57402/w960_57402-2385.png)
LAN-10
[CAN]
CANSYSTEM(FORA/TMODELS)
3.CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector F43 terminals
33(B/W), 34 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness between ECM and TCM.
4.ECM/TCM INTERNAL CIRCUIT INSPECTION
Check components inspection. Refer toLAN-10, "
ECM/TCM INTERNAL CIRCUIT INSPECTION"
OK or NG
OK >> Reconnect all connectors to perform “SELF-DIAG RESULTS” and “DATA MONITOR” for
“ENGINE” and “A/T”. Refer toEC-114, "
DTC U1000 CAN COMMUNICATION LINE"(WITH
EURO-OBD) orEC-460, "
DTC U1000 CAN COMMUNICATION LINE"(WITHOUT EURO-OBD)
for “ENGINE” and Refer toAT-213, "
DTC U1000 CAN COMMUNICATION LINE"(EURO-OBD) or
AT-443, "
CAN CAMMUNICATION LINE"(EXC.F/EURO-OBD) for “A/T”.
NG >> Replace ECM and/or TCM.
Component InspectionEKS002AI
ECM/TCM INTERNAL CIRCUIT INSPECTION
lRemove ECM and TCM from vehicle.
lCheck resistance between ECM terminals 33 and 34.
lCheck resistance between TCM terminals 5 and 6.33(B/W) – ground : Continuity should not exist.
34(L/R) – ground : Continuity should not exist.
SKIA0889E
Unit Terminal Resistance value (W)
ECM 33–34
Approx. 108 - 132
TCM 5 – 6
PKIA0298E
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CAN SYSTEM (FOR M/T MODELS)
LAN-11
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CANSYSTEM(FORM/TMODELS)PFP:23710
System DescriptionEKS002FK
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.
Component Parts and Harness Connector LocationEKS002FL
SKIA0981E
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LAN-12
[CAN]
CAN SYSTEM (FOR M/T MODELS)
Wiring Diagram — CAN —
EKS002FM
T K WA 0 111 E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual CAN SYSTEM (FOR M/T MODELS)
LAN-13
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Work FlowEKS002FN
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL MODE 4WD”,
and NISSAN X-TRAIL 2003 Electronic Repair Manual CAN SYSTEM (FOR M/T MODELS)
LAN-13
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Work FlowEKS002FN
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL MODE 4WD”,
and](/manual-img/5/57402/w960_57402-2388.png)
CAN SYSTEM (FOR M/T MODELS)
LAN-13
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Work FlowEKS002FN
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL MODE 4WD”,
and “ABS” displayed on CONSULT-II. Refer toEC-114, "
DTC U1000 CAN COMMUNICATION LINE"
(WITH EURO-OBD) orEC-460, "DTC U1000 CAN COMMUNICATION LINE"(WITHOUT EURO-OBD)
for“ENGINE”andRefertoTF-53, "
CAN COMMUNICATION SYSTEM"for “ALL MODE 4WD”. Refer to
BRC-108, "
Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steering Angle
Sensor"for “ABS”.
2. Attach the printed sheet of “SELF-DIAG RESULTS” and “DATA MONITOR” onto the check sheet. Refer to
LAN-14, "
CHECK SHEET"
3. Based on the data monitor results, put “v” marks onto the items with “UNKWN” or “NG” in the check sheet
table. Refer toLAN-14, "
CHECK SHEET"
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
4. According to the check sheet results (example), start inspection. Refer toLAN-15, "
CHECK SHEET
RESULTS (EXAMPLE)"
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LAN-14
[CAN]
CAN SYSTEM (FOR M/T MODELS)
CHECK SHEET
SKIA0925E
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CAN SYSTEM (FOR M/T MODELS)
LAN-15
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CHECK SHEET RESULTS (EXAMPLE)
SKIA0926E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual LAN-16
[CAN]
CAN SYSTEM (FOR M/T MODELS)
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
INSPECTION
Proceed trouble diagnosis according to th NISSAN X-TRAIL 2003 Electronic Repair Manual LAN-16
[CAN]
CAN SYSTEM (FOR M/T MODELS)
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
INSPECTION
Proceed trouble diagnosis according to th](/manual-img/5/57402/w960_57402-2391.png)
LAN-16
[CAN]
CAN SYSTEM (FOR M/T MODELS)
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
INSPECTION
Proceed trouble diagnosis according to the check sheet results (example).
Case 1:Replace ECM.
Case 2:Replace ESP/TCS/ABS control unit.
Case 3:Replace 4WD control unit.
Case 4:Check Harness between steering wheel angle sensor and 4WD control unit. Refer toLAN-16, "
Circuit
Check Between Steering Wheel Angle Sensor and 4WD Control Unit"
Case 5:Check ECM Circuit. Refer toLAN-17, "ECM Circuit Check"
Case 6:Check 4WD control unit Circuit. Refer toLAN-18, "4WD Control Unit Circuit Check"
Case 7:Check Steering wheel angle sensor Circuit. Refer toLAN-18, "Steering Wheel Angle Sensor Circuit
Check"
Case 8:Check ESP/TCS/ABS control unit Circuit. Refer toLAN-19, "ESP/TCS/ABS Control Unit Circuit
Check"
Case 9:Check CAN communication Circuit. Refer toLAN-20, "CAN Communication Circuit Check"
Circuit Check Between Steering Wheel Angle Sensor and 4WD Control UnitEKS002FO
1.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check following terminals and connector for damage, bend and loose connection. (control unit-side, sen-
sor-side and harness-side)
l4WD control unit.
lSteering wheel angle sensor.
lBetween 4WD control unit and steering wheel angle sensor.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
SKIA0927E