Nissan Murano Z50 (2003 year). Manual - part 196

LAN-750

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

Case 14

Check IPDM E/R circuit. Refer to 

LAN-759, "IPDM E/R Circuit Check"

 .

Case 15

Check CAN communication circuit. Refer to 

LAN-760, "CAN Communication Circuit Check"

 .

PKIB0913E

SKIA5408E

PKIB0914E

CAN SYSTEM (TYPE 22)

LAN-751

[CAN]

C

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Revision; 2004 April

2003 Murano

Case 16

Check IPDM E/R ignition relay circuit continuously sticks “OFF”. Refer to 

LAN-764, "IPDM E/R Ignition Relay

Circuit Check"

 .

Case 17

Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to 

LAN-764, "IPDM E/R Ignition Relay

Circuit Check"

 .

PKIB0915E

PKIB0916E

LAN-752

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

Circuit Check Between TCM and Data Link Connector

AKS0072O

1. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Disconnect ECM connector and harness connector M82.

4.

Check continuity between harness connector M82 terminals 8
(L), 9 (Y) and data link connector M24 terminals 6 (L), 14 (Y).

OK or NG

OK

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

LAN-733, "Work Flow"

 .

NG

>> Repair harness.

Circuit Check Between Data Link Connector and Driver Seat Control Unit

AKS0072P

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 (connector side and
harness side).

●

Harness connector M9

●

Harness connector B2

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect harness connector M9.

2.

Check continuity between data link connector M24 terminals 6
(L), 14 (Y) and harness connector M9 terminals 1 (L), 10 (Y).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness.

8 (L) - 6 (L)

: Continuity should exist.

9 (Y) - 14 (Y)

: Continuity should exist.

SKIA5014E

6 (L) - 1 (L)

: Continuity should exist.

14 (Y) - 10 (Y)

: Continuity should exist.

SKIA5015E

CAN SYSTEM (TYPE 22)

LAN-753

[CAN]

C

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LAN

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

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

LAN-733, "Work Flow"

 .

NG

>> Repair harness.

Circuit Check Between Driver Seat Control Unit and ABS Actuator and Electric 
Unit (Control Unit)

AKS0072Q

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 (connector side and
harness side).

●

Harness connector B4

●

Harness connector E105

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect harness connector B2 and 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 3.

NG

>> Repair harness.

1 (L) - 3 (L)

: Continuity should exist.

10 (Y) - 10 (Y)

: Continuity should exist.

SKIA5016E

1 (L) - 3 (L)

: Continuity should exist.

10 (Y) - 10 (Y)

: Continuity should exist.

SKIA5016E

LAN-754

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

3. 

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-733, "Work Flow"

 .

NG

>> Repair harness.

ECM Circuit Check

AKS0072R

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.

TCM Circuit Check

AKS0072S

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.

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 22)

LAN-755

[CAN]

C

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LAN

Revision; 2004 April

2003 Murano

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

AKS0072T

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.

Display Unit Circuit Check

AKS0072U

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect the negative battery terminal.

3.

Check terminals and connector of display unit for damage, bend and loose connection (unit side and har-
ness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

5 (L) - 6 (Y) 

: Approx. 54 - 66

Ω

PKIA0817E

9 (L) - 21 (Y) 

: Approx. 54 - 66

Ω

PKIA2082E

LAN-756

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect display unit connector.

2.

Check resistance between display unit harness connector M39
terminals 14 (L) and 16 (Y).

OK or NG

OK

>> Replace display unit.

NG

>> Repair harness between display unit and data link con-

nector.

Data Link Connector Circuit Check

AKS0072V

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-733, "Work Flow"

 .

NG

>> Repair harness between data link connector and BCM.

BCM Circuit Check

AKS0072W

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.

14 (L) - 16 (Y) 

: Approx. 54 - 66

Ω

SKIA5018E

6 (L) - 14 (Y) 

: Approx. 54 - 66

Ω

PKIA2077E

CAN SYSTEM (TYPE 22)

LAN-757

[CAN]

C

D

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LAN

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

AKS0072X

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

AKS0072Y

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

LAN-758

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

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

AKS0072Z

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

AKS00730

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

CAN SYSTEM (TYPE 22)

LAN-759

[CAN]

C

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LAN

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

AKS00731

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

LAN-760

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

CAN Communication Circuit Check

AKS00732

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, unit side, meter side and harness side).

●

ECM

●

TCM

●

Low tire pressure warning control unit

●

Display 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 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 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

CAN SYSTEM (TYPE 22)

LAN-761

[CAN]

C

D

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LAN

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 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

LAN-762

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

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

CAN SYSTEM (TYPE 22)

LAN-763

[CAN]

C

D

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F

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LAN

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-764, "ECM/IPDM E/R INTERNAL CIRCUIT INSPECTION"

 .

OK or NG

OK

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

LAN-733, "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

LAN-764

[CAN]

CAN SYSTEM (TYPE 22)

Revision; 2004 April

2003 Murano

IPDM E/R Ignition Relay Circuit Check

AKS00733

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

AKS00734

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

CAN SYSTEM (TYPE 23)

LAN-765

[CAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

Revision; 2004 April

2003 Murano

CAN SYSTEM (TYPE 23)

PFP:23710

System Description

AKS00735

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

AKS00736

SKIA5857E