Nissan Murano Z50 (2003 year). Manual - part 201

LAN-830

[CAN]

CAN SYSTEM (TYPE 24)

Revision; 2004 April

2003 Murano

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect BCM connector.

2.

Check resistance between BCM harness connector M37 termi-
nals 70 (L) and 71 (Y).

OK or NG

OK

>> Replace BCM. Refer to 

BCS-36, "Removal and Installa-

tion of BCM"

 .

NG

>> Repair harness between BCM and data link connector.

Unified Meter and A/C Amp. Circuit Check

AKS00744

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of unified meter and A/C amp. for damage, bend and loose connection
(meter side and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect unified meter and A/C amp. connector.

2.

Check resistance between unified meter and A/C amp. harness
connector M49 terminals 1 (L) and 11 (Y).

OK or NG

OK

>> Replace unified meter and A/C amp.

NG

>> Repair harness between unified meter and A/C amp.

and data link connector.

Driver Seat Control Unit Circuit Check

AKS00745

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check following terminals and connectors for damage, bend and loose connection (control unit side and
harness side).

●

Driver seat control unit connector

●

Harness connector B301

●

Harness connector B9

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

70 (L) - 71 (Y) 

: Approx. 54 - 66

Ω

LKIA0028E

1 (L) - 11 (Y) 

: Approx. 54 - 66

Ω

PKIA2078E

CAN SYSTEM (TYPE 24)

LAN-831

[CAN]

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2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect driver seat control unit connector.

2.

Check resistance between driver seat control unit harness con-
nector B303 terminals 3 (L/Y) and 19 (BR/W).

OK or NG

OK

>> Replace driver seat control unit.

NG

>> Repair harness between driver seat control unit and har-

ness connector B4.

AWD Control Unit Circuit Check

AKS00746

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of AWD control unit for damage, bend and loose connection (control unit
side and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect AWD control unit connector.

2.

Check resistance between AWD control unit harness connector
E111 terminals 8 (L) and 16 (Y).

OK or NG

OK

>> Replace AWD control unit.

NG

>> Repair harness between AWD control unit and IPDM E/

R.

ABS Actuator and Electric Unit (Control Unit) Circuit Check

AKS00747

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of ABS actuator and electric unit (control unit) for damage, bend and loose
connection (control unit side and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

3 (L/Y) - 19 (BR/W) 

: Approx. 54 - 66

Ω

SKIA5024E

8 (L) - 16 (Y) 

: Approx. 54 - 66

Ω

SKIA5033E

LAN-832

[CAN]

CAN SYSTEM (TYPE 24)

Revision; 2004 April

2003 Murano

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect ABS actuator and electric unit (control unit) connector.

2.

Check resistance between ABS actuator and electric unit (con-
trol unit) harness connector E24 terminals 11 (L) and 15 (Y).

OK or NG

OK

>> Replace ABS actuator and electric unit (control unit).

NG

>> Repair harness between ABS actuator and electric unit

(control unit) and IPDM E/R.

IPDM E/R Circuit Check

AKS00748

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of IPDM E/R for damage, bend and loose connection (control module side
and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

Check resistance between IPDM E/R harness connector E9 ter-
minals 48 (L) and 49 (Y).

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair harness between IPDM E/R and ABS actuator

and electric unit (control unit).

11 (L) - 15 (Y) 

: Approx. 54 - 66

Ω

SKIA5019E

48 (L) - 49 (Y) 

: Approx. 108 - 132

Ω

LKIA0030E

CAN SYSTEM (TYPE 24)

LAN-833

[CAN]

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CAN Communication Circuit Check

AKS00749

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check following terminals and connectors for damage, bend and loose connection (control module side,
control unit side, meter side and harness side).

●

ECM

●

TCM

●

Low tire pressure warning control unit

●

Display control unit

●

BCM

●

Unified meter and A/C amp.

●

Driver seat control unit

●

AWD control unit

●

ABS actuator and electric unit (control unit)

●

IPDM E/R

●

Between ECM and IPDM E/R

●

Between ECM and TCM

●

Between ECM and driver seat control unit

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect following connectors.

–

ECM connector

–

Low tire pressure warning control unit connector

–

Harness connector M82

–

Display control unit connector

–

BCM connector

–

Unified meter and A/C amp. connector

–

Harness connector M9

2.

Check continuity between data link connector M24 terminals 6
(L) and 14 (Y).

OK or NG

OK

>> GO TO 3.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Harness between data link connector and ECM.

●

Harness between data link connector and low tire
pressure warning control unit.

●

Harness between data link connector and harness connector M82.

●

Harness between data link connector and display control unit.

●

Harness between data link connector and BCM.

●

Harness between data link connector and unified meter and A/C amp.

●

Harness between data link connector and harness connector M9.

6 (L) - 14 (Y) 

: Continuity should not exist.

PKIA2077E

LAN-834

[CAN]

CAN SYSTEM (TYPE 24)

Revision; 2004 April

2003 Murano

3. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between data link connector M24 terminals 6 (L),
14 (Y) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Harness between data link connector and ECM.

●

Harness between data link connector and low tire
pressure warning control unit.

●

Harness between data link connector and harness connector M82.

●

Harness between data link connector and display control unit.

●

Harness between data link connector and BCM.

●

Harness between data link connector and unified meter and A/C amp.

●

Harness between data link connector and harness connector M9.

4. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect TCM connector.

2.

Check continuity between TCM harness connector F103 termi-
nals 5 (L) and 6 (Y).

OK or NG

OK

>> GO TO 5.

NG

>> Repair harness between TCM and harness connector

F102.

5. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between TCM harness connector F103 terminals 5
(L), 6 (Y) and ground.

OK or NG

OK

>> GO TO 6.

NG

>> Repair harness between TCM and harness connector

F102.

6 (L) - Ground

: Continuity should not exist.

14 (Y) - Ground

: Continuity should not exist.

PKIA2079E

5 (L) - 6 (Y) 

: Continuity should not exist.

PKIA0817E

5 (L) - Ground

: Continuity should not exist.

6 (Y) - Ground

: Continuity should not exist.

SKIA5020E

CAN SYSTEM (TYPE 24)

LAN-835

[CAN]

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6. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect harness connector B4 and harness connector B9.

2.

Check continuity between harness connector B4 terminals 3 (L)
and 10 (Y).

OK or NG

OK

>> GO TO 7.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Repair harness between harness connector B4 and
harness connector B2.

●

Repair harness between harness connector B4 and
harness connector B9.

7. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between harness connector B4 terminals 3 (L), 10
(Y) and ground.

OK or NG

OK

>> GO TO 8.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Repair harness between harness connector B4 and
harness connector B2.

●

Repair harness between harness connector B4 and harness connector B9.

8. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect driver seat control unit connector.

2.

Check continuity between driver seat control unit harness con-
nector B303 terminals 3 (L/Y) and 19 (BR/W).

OK or NG

OK

>> GO TO 9.

NG

>> Repair harness between driver seat control unit and har-

ness connector B301.

3 (L) - 10 (Y) 

: Continuity should not exist.

SKIA5021E

3 (L) - Ground

: Continuity should not exist.

10 (Y) - Ground

: Continuity should not exist.

SKIA5022E

3 (L/Y) - 19 (BR/W) 

: Continuity should not exist.

SKIA5024E

LAN-836

[CAN]

CAN SYSTEM (TYPE 24)

Revision; 2004 April

2003 Murano

9. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between driver seat control unit harness connector
B303 terminals 3 (L/Y), 19 (BR/W) and ground.

OK or NG

OK

>> GO TO 10.

NG

>> Repair harness between driver seat control unit and har-

ness connector B301.

10. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect AWD control unit connector, ABS actuator and electric unit (control unit) connector and IPDM
E/R connector.

2.

Check continuity between IPDM E/R harness connector E9 ter-
minals 48 (L) and 49 (Y).

OK or NG

OK

>> GO TO 11.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Harness between IPDM E/R and AWD control unit.

●

Harness between IPDM E/R and ABS actuator and
electric unit (control unit).

●

Harness between IPDM E/R and harness connector E105.

11. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between IPDM E/R harness connector E9 termi-
nals 48 (L), 49 (Y) and ground.

OK or NG

OK

>> GO TO 12.

NG

>> Check the following harnesses. If any harness is dam-

aged, repair the harness.

●

Harness between IPDM E/R and AWD control unit.

●

Harness between IPDM E/R and ABS actuator and
electric unit (control unit).

●

Harness between IPDM E/R and harness connector E105.

12. 

ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION

Check components inspection. Refer to 

LAN-837, "ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION"

 .

OK or NG

OK

>> Connect all the connectors and diagnose again. Refer to 

LAN-806, "Work Flow"

 .

NG

>> Replace ECM and/or IPDM E/R.

3 (L/Y) - Ground

: Continuity should not exist.

19 (BR/W) - Ground

: Continuity should not exist.

SKIA5025E

48 (L) - 49 (Y) 

: Continuity should not exist.

LKIA0030E

48 (L) - Ground

: Continuity should not exist.

49 (Y) - Ground

: Continuity should not exist.

LKIA0036E

CAN SYSTEM (TYPE 24)

LAN-837

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IPDM E/R Ignition Relay Circuit Check

AKS0074A

Check the following. If no malfunction is found, replace the IPDM E/R.

●

IPDM E/R power supply circuit. Refer to 

PG-45, "IPDM E/R Power/Ground Circuit Inspection"

 .

●

Ignition power supply circuit. Refer to 

PG-10, "IGNITION POWER SUPPLY - IGNITION SW. IN “ON”

AND/OR “START”"

 .

Component Inspection

AKS0074B

ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION

●

Remove ECM and IPDM E/R from vehicle.

●

Check resistance between ECM terminals 94 and 86.

●

Check resistance between IPDM E/R terminals 48 and 49.

Unit

Terminal

Resistance value (

Ω

)

(Approx.)

ECM

94 - 86

108 - 132

IPDM E/R

48 - 49

LKIA0037E

LAN-838

[CAN]

CAN SYSTEM (TYPE 25)

Revision; 2004 April

2003 Murano

CAN SYSTEM (TYPE 25)

PFP:23710

System Description

AKS0074C

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 Location

AKS0074D

SKIA5863E

CAN SYSTEM (TYPE 25)

LAN-839

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Schematic

AKS0074E

TKWA1019E

LAN-840

[CAN]

CAN SYSTEM (TYPE 25)

Revision; 2004 April

2003 Murano

Wiring Diagram - CAN -

AKS0074F

TKWA1020E

CAN SYSTEM (TYPE 25)

LAN-841

[CAN]

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TKWA1021E

LAN-842

[CAN]

CAN SYSTEM (TYPE 25)

Revision; 2004 April

2003 Murano

TKWA1022E

CAN SYSTEM (TYPE 25)

LAN-843

[CAN]

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Work Flow

AKS00C5Q

1.

When there are no indications of “TRANSMISSION” or “METER A/C AMP” on “SELECT SYSTEM” dis-
play of CONSULT-II, print the “SELECT SYSTEM”.

2.

Print all the data of “SELF-DIAG RESULTS” for “ENGINE”, “TRANSMISSION”, “BCM”, “METER A/C
AMP”, “ALL MODE AWD/4WD” and “ABS” displayed on CONSULT-II.

3.

Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “TRANSMISSION”, “BCM”, “METER A/
C AMP”, “ALL MODE AWD/4WD” and “ABS” displayed on CONSULT-II.

4.

Attach the printed sheet of “SELECT SYSTEM”, “SELF-DIAG RESULTS” and “CAN DIAG SUPPORT
MNTR” onto the check sheet. Refer to 

LAN-845, "CHECK SHEET"

 .

5.

Based on the indications of “SELECT SYSTEM” and the results of “CAN DIAG SUPPORT MNTR”, put
marks “v” onto the items with “No indication”, “NG”, or “UNKWN” in the check sheet table. Refer to 

LAN-

845, "CHECK SHEET"

 .

NOTE:

●

If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” as “CAN DIAG SUPPORT MNTR” for the diag-
nosed control unit, 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 “CAN DIAG SUPPORT MNTR” items which are not indi-
cated in check sheet table.

6.

Check CAN communication line of the integrated display system. Refer to 

AV-110, "CAN Communication

Line Check"

 .

7.

Attach the CAN DIAG MONITOR check sheet onto the check sheet. Refer to 

LAN-845, "CHECK SHEET"

.

PKIA2093E

PKIA8260E

PKIA8343E

LAN-844

[CAN]

CAN SYSTEM (TYPE 25)

Revision; 2004 April

2003 Murano

8.

Mark the “NG” or “UNKWN” item of the check sheet table with “v” from the result of CAN DIAG MONITOR
check sheet. Refer to 

LAN-845, "CHECK SHEET"

 .

NOTE:
If “NG” is displayed on “CAN COMM” as “CAN DIAG MNTR” for the diagnosed control unit, replace the
control unit. Refer to 

AV-110, "CAN Communication Line Check"

 .

9.

According to the check sheet results (example), start inspection. Refer to 

LAN-847, "CHECK SHEET

RESULTS (EXAMPLE)"

 .

CAN SYSTEM (TYPE 25)

LAN-845

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CHECK SHEET

NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.

PKIB0957E