Nissan Murano Z50 (2003 year). Manual - part 194

LAN-718

[CAN]

CAN SYSTEM (TYPE 21)

Revision; 2004 April

2003 Murano

3. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect harness connector B4.

2.

Check continuity between harness connector B2 terminals 1 (L),
10 (Y) and harness connector B4 terminals 3 (L), 10 (Y).

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness.

4. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

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

2.

Check continuity between harness connector E105 terminals 3
(L), 10 (Y) and ABS actuator and electric unit (control unit) har-
ness connector E24 terminals 11 (L), 15 (Y).

OK or NG

OK

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

LAN-700, "Work Flow"

 .

NG

>> Repair harness.

ECM Circuit Check

AKS00726

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of ECM 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 ECM connector.

2.

Check resistance between ECM harness connector M80 termi-
nals 94 (L) and 86 (Y).

OK or NG

OK

>> Replace ECM.

NG

>> Repair harness between ECM and TCM.

1 (L) - 3 (L)

: Continuity should exist.

10 (Y) - 10 (Y)

: Continuity should exist.

SKIA5016E

3 (L) - 11 (L) 

: Continuity should exist.

10 (Y) - 15 (Y) 

: Continuity should exist.

SKIA5017E

94 (L) - 86 (Y) 

: Approx. 108 - 132

Ω

PKIA0816E

CAN SYSTEM (TYPE 21)

LAN-719

[CAN]

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TCM Circuit Check

AKS00727

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
and harness side).

●

TCM connector

●

Harness connector F102

●

Harness connector M82

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect TCM connector.

2.

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

OK or NG

OK

>> Replace TCM.

NG

>> Repair harness between TCM and low tire pressure

warning control unit.

Low Tire Pressure Warning Control Unit Circuit Check

AKS00728

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of low tire pressure warning control unit for damage, bend and loose con-
nection (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 low tire pressure warning control unit connector.

2.

Check resistance between low tire pressure warning control unit
harness connector M81 terminals 9 (L) and 21 (Y).

OK or NG

OK

>> Replace low tire pressure warning control unit.

NG

>> Repair harness between low tire pressure warning con-

trol unit and TCM.

5 (L) - 6 (Y) 

: Approx. 54 - 66

Ω

PKIA0817E

9 (L) - 21 (Y) 

: Approx. 54 - 66

Ω

PKIA2082E

LAN-720

[CAN]

CAN SYSTEM (TYPE 21)

Revision; 2004 April

2003 Murano

Display Control Unit Circuit Check

AKS00729

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of display 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 display control unit connector.

2.

Check resistance between display control unit harness connec-
tor M43 terminals 25 (L) and 26 (Y).

OK or NG

OK

>> Replace display control unit.

NG

>> Repair harness between display control unit and data

link connector.

Data Link Connector Circuit Check

AKS0072A

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check data link connector and terminals for damage, bend and loose connection (connector side and har-
ness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

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

OK or NG

OK

>> Diagnose again. Refer to 

LAN-700, "Work Flow"

 .

NG

>> Repair harness between data link connector and BCM.

25 (L) - 26 (Y) 

: Approx. 54 - 66

Ω

SKIA5023E

6 (L) - 14 (Y) 

: Approx. 54 - 66

Ω

PKIA2077E

CAN SYSTEM (TYPE 21)

LAN-721

[CAN]

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BCM Circuit Check

AKS0072B

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of BCM 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 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

AKS0072C

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.

70 (L) - 71 (Y) 

: Approx. 54 - 66

Ω

LKIA0028E

1 (L) - 11 (Y) 

: Approx. 54 - 66

Ω

PKIA2078E

LAN-722

[CAN]

CAN SYSTEM (TYPE 21)

Revision; 2004 April

2003 Murano

AWD Control Unit Circuit Check

AKS0072D

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

AKS0072E

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.

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.

8 (L) - 16 (Y) 

: Approx. 54 - 66

Ω

SKIA5033E

11 (L) - 15 (Y) 

: Approx. 54 - 66

Ω

SKIA5019E

CAN SYSTEM (TYPE 21)

LAN-723

[CAN]

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IPDM E/R Circuit Check

AKS0072F

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).

CAN Communication Circuit Check

AKS0072G

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.

●

AWD control unit

●

ABS actuator and electric unit (control unit)

●

IPDM E/R

●

Between ECM and IPDM E/R

●

Between ECM and TCM

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

48 (L) - 49 (Y) 

: Approx. 108 - 132

Ω

LKIA0030E

LAN-724

[CAN]

CAN SYSTEM (TYPE 21)

Revision; 2004 April

2003 Murano

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.

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.

6 (L) - 14 (Y) 

: Continuity should not exist.

PKIA2077E

6 (L) - Ground

: Continuity should not exist.

14 (Y) - Ground

: Continuity should not exist.

PKIA2079E

CAN SYSTEM (TYPE 21)

LAN-725

[CAN]

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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. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect harness connector B4.

2.

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

OK or NG

OK

>> GO TO 7.

NG

>> Repair harness between harness connector B4 and har-

ness connector B2.

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

>> Repair harness between harness connector B4 and har-

ness connector B2.

5 (L) - 6 (Y) 

: Continuity should not exist.

PKIA0817E

5 (L) - Ground

: Continuity should not exist.

6 (Y) - Ground

: Continuity should not exist.

SKIA5020E

3 (L) - 10 (Y) 

: Continuity should not exist.

SKIA5021E

3 (L) - Ground

: Continuity should not exist.

10 (Y) - Ground

: Continuity should not exist.

SKIA5022E

LAN-726

[CAN]

CAN SYSTEM (TYPE 21)

Revision; 2004 April

2003 Murano

8. 

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 9.

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.

9. 

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 10.

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.

10. 

ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION

Check components inspection. Refer to 

LAN-727, "ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION"

 .

OK or NG

OK

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

LAN-700, "Work Flow"

 .

NG

>> Replace ECM and/or IPDM E/R.

IPDM E/R Ignition Relay Circuit Check

AKS0072H

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”"

 .

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 21)

LAN-727

[CAN]

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Component Inspection

AKS0072I

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-728

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

CAN SYSTEM (TYPE 22)

PFP:23710

System Description

AKS0072J

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

AKS0072K

SKIA5858E

CAN SYSTEM (TYPE 22)

LAN-729

[CAN]

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Schematic

AKS0072L

TKWA1007E

LAN-730

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

Wiring Diagram - CAN -

AKS0072M

TKWA1008E

CAN SYSTEM (TYPE 22)

LAN-731

[CAN]

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TKWA1009E

LAN-732

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

TKWA1010E

CAN SYSTEM (TYPE 22)

LAN-733

[CAN]

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Work Flow

AKS00C5N

1.

When there are no indications of “TRANSMISSION”, “AIR PRESSURE MONITOR”, “METER A/C AMP”
or “AUTO DRIVE POS.” on “SELECT SYSTEM” display of CONSULT-II, print the “SELECT SYSTEM”.

2.

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

3.

Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “TRANSMISSION”, “AIR PRESSURE
MONITOR”, “BCM”, “METER A/C AMP”, “AUTO DRIVE POS.”, “ALL MODE AWD/4WD” and “ABS” dis-
played 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-735, "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-

735, "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"

 .

PKIA2093E

PKIA8260E

PKIA8343E