NISSAN X-TRAIL 2003 Service Repair Manual

CAN SYSTEM (TYPE 4)
LAN-83
[CAN]
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LAN

2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect combination meter connector.
2. Check resistance between combination meter harness connec-
tor M44 terminals 22 (W) and 23 (R).
OK or NG
OK >> Replace combination meter.
NG >> Repair harness between combination meter and 4WD
control unit.
CAN Communication Circuit InspectionEKS00FVP
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect battery cable at negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (control module side,
control unit side, sensor side, meter side, connector side and harness side).
–ECM
–ESP/TCS/ABS control unit
–Steering angle sensor
–4WD control unit
–Combination meter
–Between ECM and combination meter
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect ECM connector and harness connector M75.
2. Check continuity between ECM harness connector M118 termi-
nals 95 (G/R) and 87 (GY/R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness between ECM and harness connector
M75. 22 (W) – 23 (R) : Approx. 108 – 132Ω
SKIA9780E
95 (G/R) – 87 (GY/R) : Continuity should not exist.
SKIB0120E

LAN-84
[CAN]
CAN SYSTEM (TYPE 4)

3. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector M118 terminals
95 (G/R), 87 (GY/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness between ECM and harness connector
M75.
4. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect ESP/TCS/ABS control unit connector.
2. Check continuity between ESP/TCS/ABS control unit harness
connector E122 terminals 61 (W) and 63 (R).
OK or NG
OK >> GO TO 5.
NG >> Repair harness between ESP/TCS/ABS control unit and
harness connector E116.
5. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ESP/TCS/ABS control unit harness con-
nector E122 terminals 61 (W), 63 (R) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness between ESP/TCS/ABS control unit and
harness connector E116. 95 (G/R) – Ground : Continuity should not exist.
87 (GY/R) – Ground : Continuity should not exist.
SKIB0121E
61 (W) – 63 (R) : Continuity should not exist.
PKIA9632E
61 (W) – Ground : Continuity should not exist.
63 (R) – Ground : Continuity should not exist.
PKIA9633E

CAN SYSTEM (TYPE 4)
LAN-85
[CAN]
C
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LAN

6. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect steering angle sensor connector, 4WD control unit connector and combination meter connec-
tor.
2. Check continuity between combination meter harness connector
M44 terminals 22 (W) and 23 (R).
OK or NG
OK >> GO TO 7.
NG >> Check the following harness. If any harness is dam-
aged, repair the harness.

Harness between combination meter and 4WD con-
trol unit

Harness between combination meter and steering
angle sensor

Harness between combination meter and harness connector M75
7. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between combination meter harness connector
M44 terminals 22 (W), 23 (R) and ground.
OK or NO
OK >> GO TO 8.
NG >> Check the following harness. If any harness is dam-
aged, repair the harness.

Harness between combination meter and 4WD con-
trol unit

Harness between combination meter and steering angle sensor

Harness between combination meter and harness connector M75
8. CHECK ECM AND COMBINATION METER INTERNAL CIRCUIT
Check components inspection. Refer to LAN-85, "
CHECK ECM AND COMBINATION METER INTERNAL
CIRCUIT" .
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-71, "Work Flow" .
NG >> Replace ECM and/or combination meter.
Component InspectionEKS00FVQ
CHECK ECM AND COMBINATION METER INTERNAL CIRCUIT

Remove ECM and combination meter from vehicle.

Check resistance between ECM terminals 95 and 87.

Check resistance between combination meter terminals 22 and
23.22 (W) – 23 (R) : Continuity should not exist.
SKIA9780E
22 (W) – Ground : Continuity should not exist.
23 (R) – Ground : Continuity should not exist.
SKIA9980E
Unit TerminalResistance (Ω)
(Approx.)
ECM 95 – 87
108 – 132
Combination meter 22 – 23
PKIA0830E

LAN-86
[CAN]
CAN SYSTEM (TYPE 5)

CAN SYSTEM (TYPE 5)PFP:23710
System DescriptionEKS00FWG
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 LocationEKS00FWH
SKIB0127E

CAN SYSTEM (TYPE 5)
LAN-87
[CAN]
C
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LAN

Wiring Diagram — CAN —EKS00FWI
TKWB0114E

LAN-88
[CAN]
CAN SYSTEM (TYPE 5)

TKWB0115E

CAN SYSTEM (TYPE 5)
LAN-89
[CAN]
C
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LAN

Work FlowEKS00FWJ
1. Print all the data of “SELF-DIAG RESULTS” for “ENGINE”, “A/T”, “ABS” and “ALL MODE AWD/4WD” dis-
played on CONSULT-II.
2. Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “A/T”, “ABS” and “ALL MODE AWD/
4WD” displayed on CONSULT-II.
3. Attach the printed sheet of “SELF-DIAG RESULTS” and “CAN DIAG SUPPORT MNTR” onto the check
sheet. Refer to LAN-90, "
CHECK SHEET" .
4. Based on the “CAN DIAG SUPPORT MNTR” results, put marks “v” onto the items with “NG” or “UNKWN”
in the check sheet table. Refer to LAN-90, "
CHECK SHEET" .
NOTE:

If a check mark is put on “NG” on “INITIAL DIAG (Initial diagnosis)”, replace the control unit.

The “CAN DIAG SUPPORT MNTR” items, which are not in check sheet table, are not related to diag-
nostic procedure on service manual.
So it is not necessary to check the status of the “CAN DIAG SUPPORT MNTR” items not in check
sheet table.
5. According to the check sheet results (example), start inspection. Refer to LAN-91, "
CHECK SHEET
RESULTS (EXAMPLE)" .
PKIA8260E
PKIA8343E

LAN-90
[CAN]
CAN SYSTEM (TYPE 5)

CHECK SHEET
NOTE:
If a check mark is put on “NG” on “INITIAL DIAG (Initial diagnosis)”, replace the control unit.
PKIA9622E

CAN SYSTEM (TYPE 5)
LAN-91
[CAN]
C
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LAN

CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If a check mark is put on “NG” on “INITIAL DIAG (Initial diagnosis)”, replace the control unit.
Case 1
Check harness between TCM and ESP/TCS/ABS control unit. Refer to LAN-99, "Between TCM and ESP/
TCS/ABS Control Unit Circuit Inspection" .
PKIA9623E
PKIA9642E

LAN-92
[CAN]
CAN SYSTEM (TYPE 5)

Case 2
Check harness between ESP/TCS/ABS control unit and 4WD control unit. Refer to LAN-101, "Between ESP/
TCS/ABS Control Unit and 4WD Control Unit Circuit Inspection" .
PKIA9624E
PKIA9643E