NISSAN X-TRAIL 2001 Service Repair Manual

CAN SYSTEM (FOR A/T MODELS)
LAN-9
[CAN]
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CHECK SHEET RESULTS (EXAMPLE)
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 to LAN-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).
●TCM.
●ECM.
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 the following.
●QR20DE engine models:
Continuity between ECM harness connector F43 terminals 33
(B/W) and 34 (L/R).
●QR25DE engine models:
Continuity between ECM harness connector F43 terminals 33
(W/B) 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)
(QR20DE engine models): Continuity should not
exist.
33 (W/B) – 34 (L/R)
(QR25DE engine models): Continuity should not
exist.
SKIA0888E

LAN-10
[CAN]
CAN SYSTEM (FOR A/T MODELS)
3. CHECK HARNESS FOR SHORT CIRCUIT
1. Check the following.
●QR20DE engine models:
Continuity between ECM harness connector F43 terminals 33
(B/W), 34 (L/R) and ground.
●QR25DE engine models:
Continuity between ECM harness connector F43 terminals 33
(W/B), 34 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness between ECM and TCM.
4. CHECK HARNESS FOR OPEN CIRCUIT
1. Check the following.
●QR20DE engine models:
Continuity between ECM harness connector F43 terminals 33
(B/W), 34 (L/R) and TCM harness connector F46 terminals 5 (B/
W), 6 (L/R).
●QR25DE engine models:
Continuity between ECM harness connector F43 terminals 33
(W/B), 34 (L/R) and TCM harness connector F46 terminals 5
(W/B), 6 (L/R).
OK or NG
OK >> GO TO 5.
NG >> Repair harness.33 (B/W) – ground
(QR20DE engine models): Continuity should not
exist.
34 (L/R) – ground
(QR20DE engine models): Continuity should not
exist.
33 (W/B) – ground
(QR25DE engine models): Continuity should not
exist.
34 (L/R) – ground
(QR25DE engine models): Continuity should not
exist.
SKIA0889E
33 (B/W) – 5 (B/W)
(QR20DE engine models): Continuity should exist.
34 (L/R) – 6 (L/R)
(QR20DE engine models): Continuity should exist.
33 (W/B) – 5 (W/B)
(QR25DE engine models): Continuity should exist.
34 (L/R) – 6 (L/R)
(QR25DE engine models): Continuity should exist.
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CAN SYSTEM (FOR A/T MODELS)
LAN-11
[CAN]
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5.ECM/TCM INTERNAL CIRCUIT INSPECTION
Check components inspection. Refer to LAN-11, "
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 to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for
“ENGINE”
●EC-122, "DTC U1000 CAN COMMUNICATION LINE" (QR25 WITH EURO-OBD) for “ENGINE”
●EC-513, "DTC U1000 CAN COMMUNICATION LINE" (QR25 WITHOUT EURO-OBD) for
“ENGINE”
●AT-190, "DTC U1000 CAN COMMUNICATION LINE" (EURO-OBD) for “A/T”
●AT-403, "CAN COMMUNICATION LINE" (ALL) for “A/T”
NG >> Replace ECM and/or TCM.
Component InspectionEKS002AI
ECM/TCM INTERNAL CIRCUIT INSPECTION
●Remove ECM and TCM from vehicle.
●Check resistance between ECM terminals 33 and 34.
●Check resistance between TCM terminals 5 and 6.
Unit Terminal Resistance value (Ω)
ECM 33 – 34
Approx. 108 - 132
TCM 5 – 6
PKIA0298E

LAN-12
[CAN]
CAN SYSTEM (FOR M/T MODELS)
CAN SYSTEM (FOR M/T MODELS)
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
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CAN SYSTEM (FOR M/T MODELS)
LAN-13
[CAN]
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Wiring Diagram — CAN —EKS002FM
TKWA0729E

LAN-14
[CAN]
CAN SYSTEM (FOR M/T MODELS)
Work Flow
EKS002FN
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL MODE 4WD”,
and “ABS” displayed on CONSULT-II. Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for “ENGINE”
●EC-1448, "DTC U1000 CAN COMMUNICATION LINE" (YD) for “ENGINE”
●TF-53, "CAN COMMUNICATION SYSTEM" for “ALL MODE 4WD”
●BRC-110, "Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steering Wheel
Angle Sensor" for “ABS”
2. Attach the printed sheet of “SELF-DIAG RESULTS” and “DATA MONITOR” onto the check sheet. Refer to
LAN-15, "
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 to LAN-15, "
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 to LAN-16, "
CHECK SHEET
RESULTS (EXAMPLE)" .

CAN SYSTEM (FOR M/T MODELS)
LAN-15
[CAN]
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CHECK SHEET
SKIA0925E

LAN-16
[CAN]
CAN SYSTEM (FOR M/T MODELS)
CHECK SHEET RESULTS (EXAMPLE)
SKIA0926E

CAN SYSTEM (FOR M/T MODELS)
LAN-17
[CAN]
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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 to LAN-17, "
Circuit
Check Between Steering Wheel Angle Sensor and 4WD Control Unit" .
Case 5: Check ECM circuit. Refer to LAN-18, "
ECM Circuit Check" .
Case 6: Check 4WD control unit circuit. Refer to LAN-19, "
4WD Control Unit Circuit Check" .
Case 7: Check Steering wheel angle sensor circuit. Refer to LAN-20, "
Steering Wheel Angle Sensor Circuit
Check" .
Case 8: Check ESP/TCS/ABS control unit circuit. Refer to LAN-20, "
ESP/TCS/ABS Control Unit Circuit
Check" .
Case 9: Check CAN communication circuit. Refer to LAN-21, "
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).
●4WD control unit.
●Steering wheel angle sensor.
●Between 4WD control unit and steering wheel angle sensor.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
SKIA0927E

LAN-18
[CAN]
CAN SYSTEM (FOR M/T MODELS)
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect steering wheel angle sensor connector and harness connector M75.
2. Check continuity between steering wheel angle sensor harness
connector M81 terminals 4 (W), 5 (R) and harness connector
M75 terminals 8 (W), 19 (R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect 4WD control unit connector.
2. Check continuity between harness connector E116 terminals 8
(W), 19 (R) and 4WD control unit harness connector E122 termi-
nals 48 (W), 39 (R).
OK or NG
OK >> Reconnect all connectors to perform “SELF-DIAG
RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL
MODE 4WD” and “ABS” displayed on CONSULT-II.
Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE"
(QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for
“ENGINE”
●EC-1448, "DTC U1000 CAN COMMUNICATION LINE" (YD) for “ENGINE”
●TF-53, "CAN COMMUNICATION SYSTEM" for “ALL MODE 4WD”
●BRC-110, "Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steer-
ing Wheel Angle Sensor" for “ABS”
NG >> Repair harness.
ECM Circuit CheckEKS002FQ
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).
●ECM.
●Harness connector F41 (QR20DE engine models).
●Harness connector M61 (QR20DE engine models).
●Harness connector F29 (YD22DDTi engine models).
●Harness connector M64 (YD22DDTi engine models).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.4 (W) – 8 (W) : Continuity should exist.
5 (R) – 19 (R) : Continuity should exist.
SKIA0928E
8 (W) – 48 (W) : Continuity should exist.
19 (R) – 39 (R) : Continuity should exist.
SKIA0929E