NISSAN X-TRAIL 2003 Service Repair Manual

CAN SYSTEM (TYPE 1)
LAN-23
[CAN]
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2. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect ECM connector and harness connector M75.
2. Check continuity between ECM harness connector M118 termi-
nals 94 (G/R) and 86 (GY/R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness between ECM and harness connector
M75.
3. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector M118 terminals
94 (G/R), 86 (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 ABS actuator and electric unit (control unit) connector.
2. Check continuity between ABS actuator and electric unit (control
unit) harness connector E69 terminals 20 (W) and 23 (R).
OK or NG
OK >> GO TO 5.
NG >> Repair harness between ABS actuator and electric unit
(control unit) and harness connector E116.
5. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) harness connector E69 terminals 20 (W), 23 (R) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness between ABS actuator and electric unit
(control unit) and harness connector E116. 94 (G/R) – 86 (GY/R) : Continuity should not exist.
PKIA9592E
94 (G/R) – Ground : Continuity should not exist.
86 (GY/R) – Ground : Continuity should not exist.
PKIA9593E
20 (W) – 23 (R) : Continuity should not exist.
SKIA9769E
20 (W) – Ground : Continuity should not exist.
23 (R) – Ground : Continuity should not exist.
SKIA9778E

LAN-24
[CAN]
CAN SYSTEM (TYPE 1)

6. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect 4WD control unit connector and combination meter connector.
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 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 harness connector M75
8. CHECK ECM AND COMBINATION METER INTERNAL CIRCUIT
Check components inspection. Refer to LAN-24, "
CHECK ECM AND COMBINATION METER INTERNAL
CIRCUIT" .
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-12, "Work Flow" .
NG >> Replace ECM and/or combination meter.
Component InspectionEKS00F0O
CHECK ECM AND COMBINATION METER INTERNAL CIRCUIT

Remove ECM and combination meter from vehicle.

Check resistance between ECM terminals 94 and 86.

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 94 – 86
108 – 132
Combination meter 22 – 23
PKIA0830E

CAN SYSTEM (TYPE 2)
LAN-25
[CAN]
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CAN SYSTEM (TYPE 2)PFP:23710
System DescriptionEKS00FHZ
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 LocationEKS00FI0
SKIB0084E

LAN-26
[CAN]
CAN SYSTEM (TYPE 2)

Wiring Diagram — CAN —EKS00FI1
TKWB0108E

CAN SYSTEM (TYPE 2)
LAN-27
[CAN]
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TKWB0109E

LAN-28
[CAN]
CAN SYSTEM (TYPE 2)

Work FlowEKS00FIC
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-29, "
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-29, "
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-30, "
CHECK SHEET
RESULTS (EXAMPLE)" .
PKIA8260E
PKIA8343E

CAN SYSTEM (TYPE 2)
LAN-29
[CAN]
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CHECK SHEET
NOTE:
If a check mark is put on “NG” on “INITIAL DIAG (Initial diagnosis)”, replace the control unit.
PKIA9605E

LAN-30
[CAN]
CAN SYSTEM (TYPE 2)

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 ABS actuator and electric unit (control unit). Refer to LAN-37, "Between
TCM and ABS Actuator and Electric Unit (Control Unit) Circuit Inspection" .
PKIA9606E
PKIA6495E

CAN SYSTEM (TYPE 2)
LAN-31
[CAN]
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Case 2
Check harness between ABS actuator and electric unit (control unit) and 4WD control unit. Refer to LAN-39,
"Between ABS Actuator and Electric Unit (Control Unit) and 4WD Control Unit Circuit Inspection" .
PKIA9607E
PKIA6496E

LAN-32
[CAN]
CAN SYSTEM (TYPE 2)

Case 3
Check ECM circuit. Refer to LAN-41, "ECM Circuit Inspection" .
PKIA9608E
PKIA6497E